Service Manuals


Manual Number Manual #TitleRev. DateStatusCountry Cnty
Manual Number Manual #TitleRev. DateStatusCountry Cnty
SM 6A5.0001 Electronic Circuit Controller (ECC) Test BoxECC Test Box 11/11/2013 Rev. 1 USA
SM 6495 Model 95 Highway Crossing (HC) Gate MechanismModel 95 HC Gate Mechanism 02/07/2012 Rev. 8 USA
SM 9080 PN-250F Relay - Plug-in Replacement for the PF-256 Flasher RelayPN-250F Relay - Replacement for the PF-256 Flasher Relay 07/19/2011 Rev. 1 USA
SM 7A1.0001 Light Emitting Diode (LED) Colorlight Signal Installation, Operation, & MaintenanceLED Colorlight SIG Inst., Oper., & Maint. 03/10/2010 Rev. 2 USA
SM 4516 U-5 Switch Circuit Controller 01/01/2010 Rev. 6 USA
SM 9411 Rod-In-Tie Layout SystemRod-In-Tie Layout Sys. 12/22/2009 Rev. 1 USA
SM 9237 Installation Instructions for ASTS USA Contact Replacement KitInst. Instr. for ASTS USA Contact Replacement Kit 09/17/2009 Rev. 2 USA
SM 6498 PN-150EVT Vital Timer Relay 09/11/2009 Rev. 4 USA
SM 5730 EM-1 Automatic Train Stop (ATS)EM-1 ATS 02/17/2009 Rev. 8 USA
SM 5C3.0001 Electronic Highway Crossing (HC) BellElectronic HC Bell 02/16/2009 Rev. 1 USA
SM 6495E Model 95 Gate Arm Light Fuse Retrofit Kit - Installation InstructionsModel 95 Gate Arm Light Fuse Retrofit Kit - Inst. Instr. 06/07/2007 Rev. 1 USA
SM 5434 Style "S" Electro-Pneumatic (EP) Train Stop (TS)Style "S" EP TS 02/20/2007 Rev. 3 USA
SM 8567 Solid State Code Transmitter (SSCT) CCE Compliance KitSSCT CCE Compliance Kit 12/08/2006 Rev. 2 USA
SM 9268 PC-250B Solid State (SS) Vital Biased Code Following Track Relay (TR)PC-250B SS Vital Biased Code Following TR 11/16/2006 Rev. 1 USA
SM 5041 A-10 Electro-Pneumatic (EP) Switch & Lock Movement & CP Switch ValveA-10 EP Switch & Lock Movement. & CP Switch Valve 07/13/2006 Rev. 3 USA
SM 4568 Solid State Code Transmitter (SSCT) Upgrade for GRS Type B Size 2 Mechanical Code Transmitter (Tx)SSCT Upgrade for GRS Type B Size 2 Mechanical Code Transmitter 03/28/2006 Rev. 2 USA
SM 8524A Shelf-Mounted Style Solid State Code Transmitter (SSCT)Shelf-Mounted Style SSCT 08/12/2005 Original USA
SM 9194 M-3E Switch & Lock Movement with Electronic Circuit Controller (ECC)M-3E Switch & Lock Movement with ECC 10/01/2004 Original USA
SM 4595 General Purpose Plug-In Relay LP-100 08/13/2004 Rev. 3 USA
SM 9082 PN-150SST Solid State Timer (SST)PN-150SST 02/01/2004 Original USA
SM 6486 Accutect Lightning Protection Networks 05/01/2001 Rev. 1 USA
SM 4597 PN-250 Style Relays DC Biased Vital Plug-In Relays 01/01/2001 Rev. 2 USA
SM 4596 PN-150B DC Biased Vital Line Relays 09/01/2000 Original USA
SM 2666N DN-22B Special Biased Relays for Third Rail Indicator 03/01/2000 Original USA
SM 4560 Cleaning of Relay Contacts (Common for All Relays) 09/01/1999 Rev. 1 USA
SM 5711 DA-10 Direct-Acting Switch Machine & Retrofit Valve HeadDA-10 Sw. Mach. & Retrofit Valve Head 12/01/1998 Original USA
SM 7080 Transit Color Light Signal (6 & 3/8" Outer Lens Diameter) - Installation, Operation, & MaintenanceTransit Color Light SIG (6 & 3/8" Lens) - Inst., Oper., & Maint. 11/01/1997 Original USA
SM 6495A Model 95 Gate Mechanism Pedestrian Arm Upgrade Option 08/01/1997 Original USA
SM 4599 New Mounting Bases for PN-150 & PN-25 Relays 07/01/1997 Original USA
SM 3151 FN-16, FN-16A Flasher Relay 04/01/1997 Original USA
SM 6122 Impedance & Mini Bonds 03/01/1996 Original USA
SM 6324 Accutect Electronic Wheel Detector 03/01/1996 Original USA
SM 6122B Untuned Impedance Bond N451003-3001 09/01/1995 Original USA
SM 4570 PC-250B Vital Code Following Relay 02/01/1995 Rev. 1 USA
SM 6406 Flexikron Solid-State (SS) Adjustable TimerFlexikron SS Adjustable Timer 10/01/1994 Rev. 1 USA
SM 4574 PV-250 2-Element AC Vane Relay 12/01/1993 Rev. 1 USA
SM 7052 Digitair - Front & Rear Unit Test Sets - Operator's Manual (special for Soo-Line)Digitair - Front & Rear Unit Test Sets – Oper. Manual (special for Soo-Line) 12/01/1993 Original USA
SM 6435 CP Switch Valve Assembly & AdjustmentCP Switch Valve Assembly & Adj. 08/01/1993 Original USA
SM 6474B PD-1 Style Vital Plug-in Relays - Shop MaintenancePD-1 Style Vital Plug-in Relays - Shop Maint. 04/01/1993 Original USA
SM 6473 Programmable System Status Monitor - Installation & OperationProgrammable Sys. Status Monitor - Inst. & Oper. 07/01/1992 Original USA
SM 5419 W-7 Decoding Transformer 06/01/1992 Retired USA
SM 6468 PD-1 Style Vital Plug-In Relays 06/01/1992 Original USA
SM 6474A PD-1 Style Vital Plug-in Relays - Field MaintenancePD-1 Style Vital Plug-in Relays - Field Maint. 06/01/1992 Original USA
SM 6466 Dwarf Transit SignalsDwarf Transit SIG 03/01/1992 Original USA
SM 6059A EC-10 Electronic Code Generator, Field MaintenanceEC-10 Electronic Code Generator, Field Maint. 02/01/1992 Original USA
SM 6059B EC-10 Electronic Code Generator, Shop MaintenanceEC-10 Electronic Code Generator, Shop Maint. 02/01/1992 Original USA
SM 6465 Impedance Bond Adapter Kit (Including Theory & Application of Impedance Bonds) X451486-3201Impedance Bond Adapter Kit X451486-3201 02/01/1992 Original USA
SM 5466 SL-25 & SL-26 Electric Switch LocksSL-25 & SL-26 Elect. 01/01/1992 Original USA
SM 5415 PL-3 (Position Light) SignalPL-3 SIG 08/01/1991 Original USA
SM 5453 Point Detector (PD) Gage: All SwitchesPD Gage: All Switches 08/01/1991 Original USA
SM 6438-1 DL-1A Data LoggerDL-1A 10/01/1990 Original USA
SM 6405 Yardmaster Dual Control Electric Switch MachineYardmaster Dual Cntrl Elec. Sw. Mach. 08/01/1990 Retired USA
SM 6203 Eventrak Digital Event Recording (ER) System Monitor Unit- Field MaintenanceEventrak Digital ER Sys. Monitor Unit- Field Maint. 07/01/1990 Rev. 1 USA
SM 6203A Eventrak Digital Event Recording (ER) System Monitor Unit - Shop MaintenanceEventrak Digital ER Sys. Monitor Unit - Shop Maint. 07/01/1990 Rev. 1 USA
SM 4551R DC Biased High Dropaway Track Relay (TR) PN-150BHDC Biased High Dropaway TR PN-150BH 03/01/1990 Original USA
SM 4558 PD-63AC AC Plug-In Ground Detector SystemPD-63AC AC Plug-In Ground Detector Sys. 01/01/1990 Rev. 1 USA
SM 6289A DT470B Very High Frequency (VHF) Transmitter (Tx) for LSR-500 - Locomotive Speed Regulation SystemDT470B VHF Tx for LSR-500 - Sys. 01/01/1990 Original USA
SM 6289B DR470 Very High Frequency (VHF) Receiver for LSR-500DR470 VHF Receiver for LSR-500 01/01/1990 Original USA
SM 6437A Base Assembly Procedure M-23A & M-23B Switch MachinesBase Assembly Procedure M-23A & M-23B Sw. Mach. 08/01/1989 Original USA
SM 6437B Wire Harness Assembly Procedure for M-23A & M-23B Switch MachinesWire Harness Assembly Procedure for M-23A & M-23B Sw. Mach. 08/01/1989 Original USA
SM 6108 USG-A Lightning Arresters 05/01/1989 Rev. 1 USA
SM 3225 SL-20, SL-21, SL-21A Electric Switch LocksSL-20, SL-21, SL-21A Elect. 04/01/1989 Original USA
SM 5034 H2 Searchlight SignalsH2 Searchlight SIG 04/01/1989 Original USA
SM 6265 Surge Ripple Filter 02/01/1989 Rev. 1 USA
SM 4565 DC Flasher Vital Relay PF-256 01/01/1989 Original USA
SM 5410 CP Switch Valves 10/01/1988 Original USA
SM 6256 Electro-Pneumatic (EP) Car Retarder Model 81EP Car Retarder Model 81 08/01/1988 Original USA
SM 5311 HS-2, HS-2A, HS-2B Retarder Control ValvesHS-2, HS-2A, HS-2B Retarder Cntrl Valves 07/01/1988 Rev. 1 USA
SM 5495 NA-15 Switch MachineNA-15 Sw. Mach. 04/01/1988 Original USA
SM 4571 D.C. Switch Overload Vital Relay - PN-150SO 03/01/1988 Original USA
SM 6239A Solid State (SS) Ground Detector - ShopSS Ground Detector - Shop 12/01/1987 Original USA
SM 6309 Eventrak Digital Event Recorder (ER) System Interpreter UnitEventrak Digital ER Sys. Interpreter Unit 11/01/1987 Retired USA
SM 6026 ATT-10 Audio Track TransceiverATT-10 10/01/1987 Retired USA
SM 6179 Vital Plug-In Relays -Field MaintenanceVital Plug-In Relays -Field Maint. 10/01/1987 Rev. 1 USA
SM 6308 5-Second Timer 10/01/1987 Original USA
SM 6352 AF-500 Tuned Minibond PN N451486-0701 N451486-0702 07/01/1987 Original USA
SM 3584 PT-55 Time Element (TE) RelayPT-55 TE Relay 04/01/1987 Original USA
SM 4554 DC Plug-in Coded Ground Detector Unit (GDU) Combination - PD-63DCDC Plug-in Coded GDU Combination - PD-63DC 04/01/1987 Original USA
SM 6043 Model 75 Grade Crossing Gate Mechanism 03/01/1987 Original USA
SM 6144 Light-Out Relays PN-150BL (2nd Generation)Light-Out Relays PN-150BL (2nd Gen) 03/01/1987 Original USA
SM 4570A Magnetic Stick, Code Following Vital Relay - PC-250P 01/01/1987 Original USA
SM 6231 YM-4 Electric Switch Machine, Dual Control, TrailableYM-4 Elect. Sw. Mach., Dual Control, Trailable 01/01/1987 Original USA
SM 4563A PN-250BE Relay for Time Code Control SystemPN-250BE Relay for Time Code Cntrl Sys. 12/01/1986 Retired USA
SM 4574C PV-250 Vital Plug-In AC Vane Relay for Track Circuit (TC) ApplicationsPV-250 Vital Plug-In AC Vane Relay for TC App. 11/01/1986 Rev. 1 USA
SM 6204 Eventrak Digital Event Recorder (ER) System - Interpreter UnitEventrak Digital ER Sys. - Interpreter Unit 11/01/1986 Rev. 1 USA
SM 4596F Power Transfer Vital Relay - PN-150P 08/01/1986 Original USA
SM 5796A Model 50B Retarder 08/01/1986 Retired USA
SM 6306 F-85 Inverter/Driver - Field MaintenanceF-85 Inverter/Driver - Field Maint. 05/01/1986 Original USA
SM 6307 F-85 Inverter/Driver - Shop MaintenanceF-85 Inverter/Driver - Shop Maint. 05/01/1986 Original USA
SM 5624B DC Neutral Plug-in Relay - Ordinary Acting - PN-59 04/01/1986 Original USA
SM 6128 F-81 Inverter 04/01/1986 Rev. 1 USA
SM 4563D PN-259BSR Biased Slow Drop-Away Relay 03/01/1986 Retired USA
SM 5312 X-2 Exhaust Valve 02/01/1986 Original USA
SM 5313 Model 67 Electro-Pneumatic (EP) Car RetarderModel 67 EP Car Retarder 02/01/1986 Retired USA
SM 4551D PN-150BD DC Biased 3-Position Relay 01/01/1986 Retired USA
SM 6360 Relay Test Stand PN-150/PM-250 Relays 11/01/1985 Original USA
SM 4596B DC Slow Dropaway Vital Relay (2nd Generation) PN-150BSRDC Slow Dropaway Vital Relay (2nd Gen.) PN-150BSR 09/01/1985 Original USA
SM 6337 HC-33 Marker Light Unit 08/01/1985 Original USA
SM 4596A DC Biased Neutral (BN) Track Relays (TR) (2nd Generation) PN-150BTRDC BN TR (2nd Gen.) PN-150BTR 07/01/1985 Original USA
SM 6349 Tuned Minibond (N451003-18xx) 06/01/1985 Original USA
SM 3623 KP Relay 05/01/1985 Original USA
SM 4574L PV-250 Line Relay 03/01/1985 Original USA
SM 4574N Vital Plug-in AC Vane Relay PV-250 03/01/1985 Original USA
SM 5958 Grade Crossing Warning SystemGrade Crossing Warning Sys. 03/01/1985 Original USA
SM 6289 Locomotive Speed Regulation System LSR-500Sys. LSR-500 03/01/1985 Retired USA
SM 6334 ES-20 Color Light SignalES-20 Color Light SIG 02/01/1985 Original USA
SM 6326 Flashing Light Assembly 01/01/1985 Original USA
SM 5030 Double Acting Oil Buffer for Spring Switches 08/01/1984 Original USA
SM 4596X PN-150N DC Neutral Relay (2nd Generation)PN-150N DC Neutral Relay (2nd Gen.) 06/01/1984 Original USA
SM 4551A PN-150B DC Biased Neutral (BN) Plug-in Track Relay (TR)PN-150B DC BN Plug-in TR 02/01/1984 Retired USA
SM 5952 Constant Potential Rectifier (CPR) RectifiersCPR Rectifiers 02/01/1984 Original USA
SM 2666B DN-22A Slow Release Relays with Low Voltage (LV) ContactsDN-22A Slow Release Relays with LV Contacts 01/01/1984 Original USA
SM 6047 HC-120 Signal UnitsHC-120 SIG Units 09/01/1983 Original USA
SM 2666D DN-22P Power Transfer Relays 07/01/1983 Retired USA
SM 4547 RD Relays 07/01/1983 Original USA
SM 4574M PV-250 Track Relay (TR)PV-250 TR 07/01/1983 Original USA
SM 6252 MM-25 Motion Monitor 06/01/1983 Original USA
SM 4563 PN-250BE D.C. High Efficiency Biased Plug-In Relay 05/01/1983 Original USA
SM 4563C PN-258B Biased Slow Pick-up, Ordinary Drop-Away Relays 05/01/1983 Retired USA
SM 5782A YM-2 Electric Yard Switch MachineYM-2 Elect. Yard Sw. Mach. 05/01/1983 Retired USA
SM 5400C CD Code Following Relay for Coded Wayside Signal System & Code Cab Signal ControlCD Code Following Relay for Coded Wayside SIG Sys. & Code Cab SIG Cntrl 03/01/1983 Original USA
SM 6262 Transit Color Light Signals 3-Color TypeTransit Color Light SIG 3-Color Type 03/01/1983 Original USA
SM 6232 Modular Color Lights MCL-100MCL-100 02/01/1983 Retired USA
SM 4582 VE-9 Neutral DC Relays 01/01/1983 Retired USA
SM 4582A VE-9S Neutral DC Relays 01/01/1983 Retired USA
SM 6216 PI-150 DC Plug-In Relay 01/01/1983 Original USA
SM 5431 Type "G" Air Compressor Unit 12/01/1982 Retired USA
SM 5782 YM-2 Electric Yard Switch MachineYM-2 Elect. Yard Sw. Mach. 12/01/1982 Retired USA
SM 5624A PN-59 Slow Drop Away, Plug-In DC Neutral Relays (PN N273665, N386090, N436928)PN-59 Slow Drop Away Relays 10/01/1982 Original USA
SM 5961 Presence Monitor - Model PM-10Model PM-10 10/01/1982 Retired USA
SM 2666K DN-22BH High Release Biased Track RelayDN-22BH High Release Biased TR 09/01/1982 Original USA
SM 4551Q PN-150BE D.C. Biased Neutral (BN) Plug-In High Efficiency Line Relay for Use with UT Timing UnitPN-150BE D.C. Line Relay for Use with UT Timing Unit 09/01/1982 Retired USA
SM 4578 PT-150 Plug-In Thermal Relay with Snap-Action Back Contact 09/01/1982 Original USA
SM 5465C Conversion of CD Code Following Relay to CDP Code Following Relay & Conversion of Plug CouplerConversion of CD Code Following Relay & Plug Coupler to CDPr 09/01/1982 Original USA
SM 5903 WD-30 & WD-30D Electronic Wheel DetectorWD-30 & WD-30D Elect. Wheel Detector 09/01/1982 Retired USA
SM 3079 H-5 D.C. Searchlight Signal Operating UnitH-5 D.C. Searchlight SIG Oper. Unit 08/01/1982 Original USA
SM 6225 CIE Pulse Filler Unit 07/01/1982 Retired USA
SM 6253 No Motion Detector 07/01/1982 Retired USA
SM 6048 Junction Box Cross Arms XA-120 04/01/1982 Retired USA
SM 6076 HC-100 Signal Unit Alignment & MaintenanceHC-100 SIG Unit Alignment & Maint. 04/01/1982 Original USA
SM 4551L PN-150BE Relay 01/01/1982 Original USA
SM 6094 BA-10 Aluminum DC Crossing Bell (with Steel Gong) 01/01/1982 Original USA
SM 2444 DN-11 Neutral Relays 11/01/1981 Original USA
SM 6215 Broken Joint & Overrun Detector (BJORD-10)BJORD-10 11/01/1981 Original USA
SM 5465 CDP Code Following Relay 06/01/1981 Original USA
SM 6137 F-82 Inverter (PN N451033-4101) 06/01/1981 Original USA
SM 5962 CCR-A Rectifier 05/01/1981 Retired USA
SM 4551B PN-150N DC Neutral Plug-In Relay 02/01/1981 Retired USA
SM 4551E PN-150HD Plug-In Relay with Heavy Duty Contacts 02/01/1981 Retired USA
SM 4587 PN-150T Time Element (TE) Relay with 2F ContactsPN-150T TE Relay with 2F Contacts 02/01/1981 Original USA
SM 5626A Style GR Track Receivers for Automatic Train Control (TC) SystemStyle GR Track Receivers for ATC Sys. 02/01/1981 Original USA
SM 4551F PN-150P Plug-In Power Transfer Relays (4-Point) 11/01/1980 Retired USA
SM 4551F1 PN-150P Plug-in Power Transfer Relays (4-Point) 11/01/1980 Original USA
SM 4551G PP-151 Magnetic Stick DC Plug-In Relay 10/01/1980 Retired USA
SM 4551J PN-150BL Plug-In Light Out Relay 10/01/1980 Retired USA
SM 6172 100 Hz Band Pass Filter 10/01/1980 Original USA
SM 5862 Surge-Ripple Filter N451036-0702 (2.5 Amp) 07/01/1980 Retired USA
SM 5951 CCR Rectifier 07/01/1980 Original USA
SM 5966 FR-HI Shunt Track Unit 07/01/1980 Original USA
SM 6007 W-800 Transformers 07/01/1980 Original USA
SM 5011 R-2 Color Light SignalsR-2 Color Light SIG 06/01/1980 Original USA
SM 4501 KP Relays for Locomotive Control Service 04/01/1980 Retired USA
SM 4551H PV-250 Power Off Relay 04/01/1980 Original USA
SM 4563B PN-258BSR Slow Pick Up, Slow Drop Away Relay 04/01/1980 Retired USA
SM 5032 P-5 & TP-5 Color Light SignalsP-5 & TP-5 Color Light SIG 03/01/1980 Original USA
SM 2377 Style "H" & "H-2" DC Searchlight Signal Operating Unit with Alnico Permanent MagnetsStyle "H" & "H-2" DC Searchlight with Alnico Permanent Magnets 01/01/1980 Original USA
SM 5048 H-5 Searchlight SignalsH-5 Searchlight SIG 10/01/1979 Original USA
SM 5762 M-4 Electric Switch MachineM-4 Elect. Sw. Mach. 10/01/1979 Retired USA
SM 5796B Model 50B Retarders with Pneumatic Pilot Check Valves 10/01/1979 Retired USA
SM 6015 DR-40 Radar 09/01/1979 Retired USA
SM 2444A DN-11 Relays, Ordinary Acting 06/01/1979 Original USA
SM 2666G DN-22 Relays with High Voltage (HV) ContactsDN-22 Relays with HV Contacts 06/01/1979 Original USA
SM 5406 Y-10 & Y-20 Decoding Units for Coded Wayside Signal System & Cab Signal ControlY-10 & Y-20 Decoding Units for Coded Wayside SIG Sys. & Cab SIG Cntrl 06/01/1979 Retired USA
SM 4551C PN-150BSR Slow Drop Away Relay 05/01/1979 Retired USA
SM 4575 PC-250BE, -250PE, 2-Contact Plug-In Code Following Relays 05/01/1979 Retired USA
SM 5796 Model 50B Retarder 05/01/1979 Retired USA
SM 2365 DT-10 Time Element (TE) RelaysDT-10 TE Relays 04/01/1979 Original USA
SM 3011 SL-6, & SL-6A Outlying Switch LockSL-6, & SL-6A Outlying 04/01/1979 Original USA
SM 5893 HC-100 Signal - MaintenanceHC-100 SIG - Maint. 04/01/1979 Original USA
SM 5926 DCS-601 Digital Carrier SystemDCS-601 04/01/1979 Retired USA
SM 3623A1 Calibration Tables & Service Instructions for Overhaul of KP Relays, Stick TypeCalibration Tables & Service Instr. for Overhaul of KP Relays, Stick Type 03/01/1979 Original USA
SM 4551 PN-150B DC Plug-In. Line Relays 03/01/1979 Retired USA
SM 5455 Magnet Charger for Permanent Magnets for Style CD, P-4 & KP Relays & F-10 Tuned AlternatorMagnet Charger for CD, P-4 & KP Relays & F-10 Alternator 03/01/1979 Retired USA
SM 5708 Style DA-10 Switch MachineStyle DA-10 Sw. Mach. 03/01/1979 Original USA
SM 6127 61-2/3 Hz Filter Unit 02/01/1979 Original USA
SM 5815 AL-70 Aluminum Crossing Gate Installation & MaintenanceAL-70 Aluminum Crossing Gate Inst. & Maint. 01/01/1979 Retired USA
SM 6035 F-80 Solid State (SS) InverterF-80 SS Inverter 10/01/1978 Original USA
SM 2666 DN-22 Neutral Relays 09/01/1978 Original USA
SM 4551-Z5 PN-150BL Light-Out Biased Neutral (BN) DC RelayPN-150BL Light-Out BN DC Relay 09/01/1978 Retired USA
SM 5143 DC Repeater 08/01/1978 Retired USA
SM 6089 MM-21 Motion MonitorMM-21 07/01/1978 Original USA
SM 4564 PT-250 Plug-In Time Element (TE) RelayPT-250 Plug-In TE Relay 05/01/1978 Retired USA
SM 5022 P-4 Color Light SignalsP-4 Color Light SIG 05/01/1978 Retired USA
SM 4580A PC-250BAE One Front Contact Biased Plug-In Code Following Relay 04/01/1978 Original USA
SM 3611 PC-57 Plug-In Code Transmitter (Tx) for DC OperationPC-57 Plug-In Code Tx for DC Oper. 01/01/1978 Original USA
SM 6037 MM-20 Motion MonitorMM-20 10/01/1977 Retired USA
SM 6080 USG Lightning Arresters 07/01/1977 Original USA
SM 6083 Auto Route Selection & Retarder Speed ControlAuto Route Selection & Retarder Speed Cntrl 07/01/1977 Original USA
SM 4574H PV-250 Power Off Relay 06/01/1977 Retired USA
SM 4574J PV-250 60 Hz Track Relay (TR) with 115 Volt Local 500 Turn Track Coil 06/01/1977 Original USA
SM 4588A F50-1 Inverter Follower- Input Stage 05/01/1977 Retired USA
SM 4588B F50-2 Inverter Follower 05/01/1977 Original USA
SM 5485 SRD-5 Self-Restoring Dragging Equipment DetectorSRD-5 Self-Restoring Dragging Equip. Detector 04/01/1977 Retired USA
SM 4519 FN-27 Flasher Relay 03/01/1977 Original USA
SM 4589 F-70 Inverter Driver 03/01/1977 Original USA
SM 6059 EC-10 Code Generator 03/01/1977 Retired USA
SM 5425 M-22A, M-22B Electric Switch & Lock Movement Dual ControlM-22A, M-22B Elect. Switch & Lock Movement Dual Cntrl 01/01/1977 Retired USA
SM 4551S PN-150NE Plug-In D.C. Neutral Ordinary Acting High Efficiency Line RelaysPN-150NE Plug-In D.C. Neutral Ordinary Acting High Efficiency Relays 11/01/1976 Retired USA
SM 5793 Type IV Weigh Rail 09/01/1975 Original USA
SM 4596C PN-150BC Decoding Relays & PN-150BCT Transmitting Relays 08/01/1975 Retired USA
SM 5967 VRG-10 Voltage Regulator 08/01/1975 Retired USA
SM 5407 Style "R" Roller Bearings for Switches 07/01/1975 Original USA
SM 5856 Tachometer Generator Single Channel (N451124-0101) Dual Channel (N451124-0102)Tachometer Generator Single Channel Dual Channel 07/01/1975 Retired USA
SM 4591 GJ Relays 05/01/1975 Retired USA
SM 4563E PN-250B, D. C. Biased Relay 03/01/1975 Original USA
SM 5921 Motion Monitor MM-10MM-10 12/01/1974 Original USA
SM 4580 PC-250BE-1FB Contact Biased Plug-In Code Following Relay 08/01/1974 Retired USA
SM 4598 GX Relays 03/01/1974 Retired USA
SM 5889 YM-3B Electric Yard Switch MachineYM-3B Elect. Yard Sw. Mach. 01/01/1974 Retired USA
SM 4551K PN-150BC D.C. Biased Plug-In Decoding Relays 10/01/1973 Retired USA
SM 5801 HC-100 Highway Crossing SignalsHC-100 SIG 08/01/1973 Retired USA
SM 5963 CPR-A Rectifier (Constant Potential Rectifier)CPR-A Rectifier 07/01/1973 Retired USA
SM 5953 CCRP Rectifier 02/01/1973 Retired USA
SM 5954 CCRX Rectifier 02/01/1973 Retired USA
SM 5715 F-20 Inverter 01/01/1973 Retired USA
SM 4514D PN-50BH High Drop-Away Track Relay (TR)PN-50BH High Drop-Away TR 06/01/1971 Retired USA
SM 4518 PC-56A Special Plug-In D.C. Code Transmitter (Tx)PC-56A Special Plug-In D.C. Code Tx 06/01/1971 Retired USA
SM 5733 F-30 Inverter 02/01/1971 Retired USA
SM 5931 Analog Speedometer 02/01/1971 Retired USA
SM 5400B CD Code Following Relay for Coded Wayside Signal System & Coded Cab Signal ControlCD Code Following Relay for Coded Wayside SIG Sys. & Coded Cab SIG Cntrl 06/01/1970 Original USA
SM 5430 Phankill Units: N, N-2 Color Light SignalsPhankill Units: N, N-2 Color Light SIG 06/01/1970 Original USA
SM 5909 Gate Arm Adapter Assembly for Model GS Crossing Gate Mechanism 06/01/1970 Original USA
SM 2336B Model 15A DC Grade Crossing Bell for Highway Crossing (HC) SignalsModel 15A DC Grade Crossing Bell for HC SIG 05/01/1970 Original USA
SM 2336C Style AH-10 AC Grade Crossing Bell for Highway Crossing (HC) SignalsStyle AH-10 AC Grade Crossing Bell for HC SIG 05/01/1970 Original USA
SM 2444Z4 Plug Couplers for DN-11, DN-11B, DN-11L, & DN-11P Relays - Parts List 05/01/1970 Original USA
SM 4551Z3 Parts List, PN-150BD Biased Three-Position DC Relays 05/01/1970 Retired USA
SM 4551Z4 Parts List, PN-150P Power Transfer Relay 05/01/1970 Retired USA
SM 5899 Parts List- Rods & Spring Type Ball Socket Connections for Switch Circuit ControllersParts List- Rods & Ball Socket For Switch Circuit Controllers 05/01/1970 Original USA
SM 5900A Parts List - Pedestal Mounted Junction Boxes 05/01/1970 Retired USA
SM 5900B Parts List - Combined Base & Junction Boxes (for 4" & 5" pipe) 05/01/1970 Retired USA
SM 5900C Parts List - Junct. Box for Mounting on Socket Bases - 6" Pipe 05/01/1970 Retired USA
SM 5900D Parts List - Junct. Box for Mounting on Side of 3" to 8" Pipe Post 05/01/1970 Retired USA
SM 5901 Parts List - HC-9 Illuminated Sign for Highway Crossing (HC) SignalsParts List - HC-9 Illuminated Sign for HC SIG 05/01/1970 Retired USA
SM 4563H PN-259SRA Slow Drop Away Relay 04/01/1970 Original USA
SM 5307 HS-1 Retarder Control Valve 04/01/1970 Retired USA
SM 2444Z1 DN-11 DC Neutral Relays - Parts List 03/01/1970 Original USA
SM 2444Z2 DN-11B Biased Neutral (BN) DC Relays - Parts ListDN-11B BN DC Relays - Parts List 03/01/1970 Original USA
SM 2444Z3 DN-11P Power Transfer Neutral DC Relay 03/01/1970 Original USA
SM 4519A Parts List - FN-27 Flasher Relays 03/01/1970 Original USA
SM 4551Z1 Parts List: PN-150B, PN-150BSR, & PN-150HD Biased Neutral (BN) DC RelaysParts List: PN-150B, PN-150BSR, & PN-150HD BN DC Relays 03/01/1970 Retired USA
SM 4551Z2 Parts List, PN-150N Neutral DC Relays 03/01/1970 Retired USA
SM 2378N Conversion of DP-25 Polarized Relay, 1 M.H.D. Contact to 2 M.H.D. Contacts 01/01/1970 Original USA
SM 5400B1 CD-F Code Following Relays for Coded Wayside Signal System & Code Cab Signal ControlCD-F Code Following Relays Coded Wayside SIG Sys. & Code Cab SIG Cntrl 01/01/1970 Original USA
SM 5886 Digital Speedometer 01/01/1970 Retired USA
SM 2666A DN-22A Neutral Relays 07/01/1969 Original USA
SM 5882 Analog Speedometer 07/01/1969 Retired USA
SM 2444D DN-11 Quick-Acting Relays with Low Voltage (LV) ContactsDN-11 Quick-Acting Relays with LV Contacts 04/01/1969 Original USA
SM 2585 DP-17 Polarized Relays 04/01/1969 Original USA
SM 5863 Type V Weigh Rail 11/01/1968 Retired USA
SM 4551T PN-150BH DC Biased Neutral (BN) Plug-in Quick Shunting Track Relay (TR)PN-150BH DC BN Plug-in Quick Shunting TR 08/01/1967 Retired USA
SM 4551V PN-150BH DC Biased Neutral (BN) Plug-In High Drop-Away A.C. Immune Track Relay (TR)PN-150BH DC BN Plug-In High Drop-Away A.C. Immune TR 08/01/1967 Retired USA
SM 4549 PL-59 Relay Groups for Automatic Train Control (ATC)PL-59 Relay Groups for ATC 07/01/1967 Original USA
SM 4593 PN-156 2-Rate Charge Relay 07/01/1967 Retired USA
SM 2745 DP-20 Retained Neutral Armature Polarized Relay 05/01/1967 Original USA
SM 4592 GJS Relays 05/01/1967 Retired USA
SM 5816 General Purpose Electronic Wheel Detector Installation & MaintentanceGeneral Purpose Electronic Wheel Detector Inst. & Maint. 05/01/1967 Retired USA
SM 5819 AC Electronic Wheel Detector 05/01/1967 Original USA
SM 2444B DN-11 Ordinary Acting Relays with High Voltage (HV) ContactsDN-11 Ordinary Acting Relays with HV Contacts 04/01/1967 Original USA
SM 4583 F-50 Inverter Follower 04/01/1967 Retired USA
SM 4586 F-70 Inverter - Driver 04/01/1967 Retired USA
SM 2390C Style DN-18C Relay 02/01/1967 Original USA
SM 4581 Reconditioning Model 32 Car Retarder 09/01/1966 Retired USA
SM 3167 PP-51 Plug-In Type Polar Relay Supplemental Service SpecificationsPP-51 Plug-In Type Polar Relay Supplemental Service Spec. 08/01/1966 Retired USA
SM 3167A Special PP-51 D.C. Plug-In Type Polar Relay 08/01/1966 Retired USA
SM 2390B DN-19 Slow Drop-Away Relays 11/01/1965 Original USA
SM 2390E Style Dn-19A Special Slow Drop-Away Relays 11/01/1965 Original USA
SM 4522A ORP-66 Plug-In DC Switch Overload Relay 10/01/1965 Retired USA
SM 4551U PN-150BM Relay with 2-Front & 2-Back Magnetic Heavy Duty ContactsPN-150BM Relay 2-Front & 2-Back Magnetic HD Contacts 10/01/1965 Retired USA
SM 2444E DN-12 Neutral Relays 07/01/1965 Original USA
SM 2666J DN-22B Standard Biased Relay 07/01/1965 Original USA
SM 2685 DN-22C Relays for Coded Wayside Signaling SystemDN-22C Relays for Coded Wayside SIG Sys. 07/01/1965 Original USA
SM 5724 Weigh Rail Type III 06/01/1965 Retired USA
SM 4579 FL-28 Flasher Relay 12/01/1964 Original USA
SM 5743 Union Transistorized Unit Carrier 03/01/1964 Retired USA
SM 2390 DN-18 Slow Pick-Up, Slow Drop-Away Relays 06/01/1963 Original USA
SM 2666S DN-22 Slow Drop-Away Relays, Low Voltage (LV) ContactsDN-22 Slow Drop-Away Relays, LV Contacts 06/01/1963 Original USA
SM 3557C PNP-69 Polarized Relays for Switch Machine ControlPNP-69 Polarized Relays for Switch Cntrl 06/01/1963 Retired USA
SM 5461 Installing Conical Red Roundels in Searchlight SignalsInst. Conical Red Roundels in Searchlight SIG 06/01/1963 Original USA
SM 2666T DN-22R Slow Pick-up Relay 05/01/1963 Retired USA
SM 4511 DN-22E Special Neutral Relay 09/01/1962 Original USA
SM 4573 Replacements for Obsolete Style M Code Transmitters (Tx)Replacements for Obsolete Style M Code Tx 09/01/1962 Original USA
SM 4507 Electro-Pneumatic (EP) Control Valve for Car Retarder ServiceEP Control Valve for Car Retarder Service 04/01/1962 Retired USA
SM 2445A DX-13 Slow Release Interlocking Relays - Low Voltage (LV) Contacts - CalibrationDX-13 Slow Release Interlocking Relays - LV Contacts 02/01/1962 Original USA
SM 2445B DX-13 Quick Acting Interlocking Relays with Low Voltage (LV) ContactsDX-13 Quick Acting Interlocking Relays with LV Contacts 02/01/1962 Original USA
SM 2445D DX-13 Interlocking Relays with High Voltage (HV) ContactsDX-13 Interlocking Relays with HV Contacts 02/01/1962 Original USA
SM 4512 PC-56 Plug-In Type Code Transmitter (Tx) for D.C. OperationPC-56 Plug-In Type Code Tx for D.C. Oper. 02/01/1962 Retired USA
SM 1862A DN-10 Train Control (TC) Special Slow Drop-Away RelaysDN-10 TC Special Slow Drop-Away Relays 01/01/1962 Original USA
SM 3623A KP Relays 08/01/1961 Original USA
SM 3623A2 Calibration Tables & Service Instructions for Overhaul of KP Relays, Standard Biased TypeCalibration & Service Instr. for Overhaul of KP Relays 08/01/1961 Original USA
SM 2444C DN-11 Slow Drop-Away Relays with Low Voltage (LV) ContactsDN-11 Slow Drop-Away Relays with LV Contacts 04/01/1961 Original USA
SM 4566 Modernization of Early PN-150 Type Relays 01/01/1961 Retired USA
SM 3628 Style KN DC Neutral Plug-Connected Relay 07/01/1960 Original USA
SM 3659 Model 31 & Model 31-A Car Retarders, Reconditioning 04/01/1960 Original USA
SM 5309 Model 32 Electro-Pneumatic (EP) Car RetarderModel 32 EP Car Retarder 03/01/1960 Original USA
SM 2597 Style L-10 Relays 01/01/1960 Original USA
SM 2444H DN-11P Power Transfer Relays 11/01/1959 Original USA
SM 3168 PT-52 Plug-in Type Thermal Relay with Plain Back Contact 11/01/1959 Retired USA
SM 4514 PN-50B D.C. Biased Neutral (BN) Plug-In Line RelayPN-50B D.C. BN Plug-In Line Relay 11/01/1959 Retired USA
SM 4514C PN-50B DC Track Relay (TR)PN-50B DC TR 10/01/1959 Retired USA
SM 2444F DN-11 Slow Drop-Away Relay - High Voltage (HV) ContactsDN-11 Slow Drop-Away Relay - HV Contacts 08/01/1959 Original USA
SM 4528 ORP-60 Switch Overload Relay 08/01/1959 Retired USA
SM 2378 DP-14 Polarized Relays 07/01/1959 Original USA
SM 4514B PN-50B Slow Drop Away Relay 07/01/1959 Retired USA
SM 4500 PN-50E DC Plug -In Neutral Relays for Locomotive Control Service 05/01/1959 Retired USA
SM 2666M DN-22 & DN-22A DC Neutral Relays for Single Coil OperationDN-22 & DN-22A DC Neutral Relays for Single Coil Oper. 04/01/1959 Original USA
SM 4524B PN-67R Retained Neut. DC Relay 03/01/1959 Retired USA
SM 4559 PP-64 Plug-in Code Following Relay for Approach Control Service 01/01/1959 Retired USA
SM 5411 Mechanism Facing Point Lock for Spring Switches - S-20, S-21 01/01/1959 Original USA
SM 3573P PTV-42 Track Relay (TR)PTV-42 TR 12/01/1958 Retired USA
SM 2635 DC Switch Indicators 09/01/1958 Retired USA
SM 3573C PTV-42 Track Relay (TR) - Operating ValuesPTV-42 TR - Oper. Values 09/01/1958 Retired USA
SM 2791 OR-20 AC Overload Relay 08/01/1958 Retired USA
SM 3166C PN-50, Plug-In Type High Release Track Relay (TR)PN-50, Plug-In Type High Release TR 08/01/1958 Retired USA
SM 3388 ANL-30 Relays 08/01/1958 Retired USA
SM 3573 PTV-42 Plug-in AC Relay 08/01/1958 Retired USA
SM 3573A 60 Cycle PTV-42 Track Relay (TR)- Operating Values60 Cycle PTV-42 TR- Oper. Values 08/01/1958 Retired USA
SM 3573D PTV-42 Track Relay (TR) - Operating ValuesPTV-42 TR - Oper. Values 08/01/1958 Retired USA
SM 3573F PTV-42 Track Relay (TR)PTV-42 TR 08/01/1958 Retired USA
SM 3573G PTV-42 Power-Off Relay 08/01/1958 Retired USA
SM 5038 Union Rust Protective Coatings for Pole Faces & Other Relay Parts 05/01/1958 Retired USA
SM 3557B Conversion of PNP-54, PNP-61 to PNP-54A, PNP-61A Relays 05/23/1957 Retired USA
SM 2666P DN-22A Partial Slow-Drop Away Relay 03/01/1957 Original USA
SM 5135A Code Filter UN238836 01/15/1957 Retired USA
SM 4514A PN-50 BL & PN 50 BL-2 DC Light-Out Relay 12/06/1956 Retired USA
SM 5459 E.P. Direct-Acting Switch MachineE.P. Direct-Acting Sw. Mach. 11/01/1956 Original USA
SM 4514E PN-50B Biased Neutral (BN) Ordinary-Acting Plug-In RelayPN-50B BN Ordinary-Acting Plug-in Relay 10/29/1956 Retired USA
SM 4514F PN-50BA Biased Neutral (BN) Slow-Drop Away Plug-In RelayPN-50BA BN Slow-Drop Away Plug-In Relay 10/29/1956 Retired USA
SM 2722 TH-10 Thermal Relay 10/12/1956 Original USA
SM 3573M PTV-42 Track Relay (TR)PTV-42 TR 07/25/1956 Retired USA
SM 3573N PTV-42 Track Relay (TR)PTV-42 TR 07/25/1956 Retired USA
SM 2378B Quick-Acting DP-14 Polarized Relays 08/30/1955 Original USA
SM 5432 Testing of Permanent Magnets: P-4 & Style P-10 Relays 08/30/1955 Original USA
SM 2390D DN-18A Slow Pick-Up, Ordinary Drop-Away Relays 03/28/1955 Original USA
SM 5467 A-20, A-21 Electro-Pneumatic (EP) Switch MachinesA-20, A-21 EP Sw. Mach. 03/01/1955 Retired USA
SM 2390A DN-18 Slow Pick-Up, Ordinary Drop-Away Relays 02/01/1955 Original USA
SM 3573L PTV-42 Track Relay (TR) Spec. 4166PTV-42 TR Spec. 4166 11/23/1954 Retired USA
SM 5499 Terminal Arrangement & Special Wiring for Plug-In Relay Mounting Bases, Except LP TypesTerminal Arrangement & Wiring Plug-In Relay Bases, No LP 11/05/1954 Original USA
SM 2666E DN-22L Lightout Relays 09/03/1954 Original USA
SM 1862 DN-10 Train Control (TC) RelaysDN-10 TC Relays 04/20/1954 Original USA
SM 2444P Special DN-11 Neutral Relay for Low Voltage (LV) Switch ControlSpecial DN-11 Neutral Relay for LV Switch Cntrl 02/16/1954 Original USA
SM 3573K PSV-43 Track Relay (TR)PSV-43 TR 12/23/1953 Retired USA
SM 2378G DP-14 Ordinary Acting & Slow Acting Polar Relays (No Neutral Contacts)DP-14 Ordinary Acting & Slow Acting Polar Relays (No Neutral) 10/01/1953 Original USA
SM 3623A3 KP Relays - Special Biased Type, One Front Contact Only 10/01/1953 Original USA
SM 5135 Code Filters PC. 237446, 235112, & 235113 07/20/1953 Retired USA
SM 5474 CDD Three Position Code Following Relay 08/14/1952 Retired USA
SM 5421 F-10 Tuned Alternator 07/23/1952 Original USA
SM 4525 Indexing of Plug-In D.C. Relays 07/01/1952 Retired USA
SM 2745A DP-21 Retained Neutral Armature Polarized Relays 05/23/1952 Original USA
SM 3166F Conversion of PN-50 & PN-50L Relays to PN-50B & PN-50BL Relays 05/01/1952 Retired USA
SM 5452 Alignment of Color Light Signals on CurvesAlignment of Color Light SIG on Curves 05/01/1952 Original USA
SM 3167B Conversion of PP-51 Relays to PP-51A Relays 03/13/1952 Retired USA
SM 5650 Electro-Pneumatic (EP) Cut-Out Relay for Car-Carried EquipmentEP Cut-Out Relay for Car-Carried Equip. Feb 21, 1952 Original USA
SM 4524 PN-67B D.C. Biased Neutral (BN) Plug-In RelayPN-67B D.C. BN Plug-In Relay 02/13/1952 Retired USA
SM 5473 P-4 Special Single-Point Relay for Approach Control ServiceP-4 Special Single-Point Relay for Approach Cntrl Service 02/01/1952 Original USA
SM 2823 P-3 Polar Relay 01/22/1952 Retired USA
SM 3557A PNP-61 & "PNP-61A" Polarized Relays for Switch Machine ControlPNP-61 & "PNP-61A" Polarized Relays for Sw. Mach. Cntrl 12/28/1951 Retired USA
SM 3557 PNP-54 & PNP-54A Plug-In Polarized Relays 12/20/1951 Retired USA
SM 4524A PN-68B Slow Pick Up, Ordinary Drop-Away Relay 12/20/1951 Retired USA
SM 3287 OR-10, & "OR-11" Overload Relays 10/01/1951 Original USA
SM 5047 DNL-46L 2-Rate Charge Relay for Lead Storage Cells 09/01/1951 Retired USA
SM 4523 PP-51-A Plug-In Polar Relay 08/13/1951 Retired USA
SM 5029 Style TP Time Release 08/01/1951 Retired USA
SM 4522 ORP-66 Switch Overload Relay 07/01/1951 Retired USA
SM 2684 Special DN-11C Relays for Coded Wayside SignalingSpecial DN-11C Relays for Coded Wayside SIG 02/08/1951 Retired USA
SM 3573J PTV-42 Power-Off Relay 02/08/1951 Retired USA
SM 4521 DNL-43 Relay 11/15/1950 Retired USA
SM 2444M Special DN-11 D.C. Relay for Time Code Control SystemSpecial DN-11 D.C. Relay for Time Code Control Sys. 10/16/1950 Original USA
SM 2444N DN-11 D.C. Neutral Relay with Armature Hold-Down Springs 10/16/1950 Original USA
SM 2444J DN-11 D.C. Neutral Relays with Magnetic Heavy Duty Contacts 10/01/1950 Original USA
SM 3573H PTV-42 Track Relay (TR) - Operating ValuesPTV-42 TR - Oper. Values 09/28/1950 Retired USA
SM 4517 Model 16 AC Interlocking Relay 09/15/1950 Retired USA
SM 5036 Adjustment & Tests of AC RelaysAdj. & Tests of AC Relays 09/01/1950 Original USA
SM 5454 DM - Code Transmitter (Tx) with Cast Brass BracketDM - Code Tx with Cast Brass Bracket 08/18/1950 Rev. 1 USA
SM 3602 RCD-5 Rectifier for Use with PP51-1 & PP51-2 Relay Combinations 07/02/1950 Rev. 1 USA
SM 5470 A-20 & A-21 Point Detector Gage 07/01/1950 Retired USA
SM 4513 DN-26 Retained Neutral Relay 06/09/1950 Retired USA
SM 3166E PN-50BL Biased Neutral Plug-In Light-out Relays 06/07/1950 Retired USA
SM 3166B PN-50 Slow Release Plug-In Relays 06/01/1950 Retired USA
SM 3166D PN-50B D.C. Biased Neutral (BN) Plug-in RelayPN-50B D.C. Biased Neutral (BN) Plug-in Relay 05/08/1950 Retired USA
SM 5622E LVE-10 AmplifierLVE-10 Amp. 04/27/1950 Original USA
SM 3657 Style LP-58 Plug-In Relays 02/08/1950 Rev. 3 USA
SM 2872 Style Z-1 DC Impedance Bond for DC Propulsion (1000 Amps per Rail)Style Z-1 DC Impedance Bond for DC Propulsion (1000 Amps) 12/21/1949 Original USA
SM 3573B PTV-42 Power-Off Relay 12/01/1949 Retired USA
SM 3573E PTV-42 Line Relay 12/01/1949 Retired USA
SM 2745B DP-20 & DP-21 Polarized Track Relays (TR)DP-20 & DP-21 Polarized TR 08/08/1949 Original USA
SM 2378C DP-14 Slow Release Relays 04/14/1949 Original USA
SM 2444L DN-11 D.C. Neutral Relay for Single Coil Operation 04/01/1949 Original USA
SM 2440 D.C. Propulsion Impedance Bond (2500 Amperes per Rail)D.C. Propulsion Impedance Bond (2500 Amp per Rail) 12/01/1948 Original USA
SM 2450 D.C. Propulsion Impedance Bond (1500 Amperes per Rail)D.C. Propulsion Impedance Bond (1500 Amp per Rail) 12/01/1948 Original USA
SM 2501 D.C. Propulsion Impedance Bond Resonant Type - 2500 Amperes per RailD.C. Propulsion Impedance Bond Resonant Type - 2500 Amp per Rail 12/01/1948 Original USA
SM 2666L DN-22A Special Relay 10/25/1948 Retired USA
SM 2444K DN-11B Standard Biased Neutral (BN) RelaysDN-11B Standard BN Relays 10/01/1948 Original USA
SM 1108D Model 12 DC Polarized Slow Release Relays with Low Voltage (LV) Switch & Lock Movement Control ContactsModel 12 DC Slow Release Relay with LV Control Contacts 08/17/1948 Original USA
SM 5472 SL-7 Mechanical Time Switch LockSL-7 Mechanical Time 07/01/1948 Retired USA
SM 2378D DP-14 Ordinary Acting Switch & Lock Movement Control RelaysDP-14 Ordinary Acting Switch & Lock Movement Cntrl Relays 03/19/1948 Original USA
SM 4569 PC-250TR Vital Code Generating Vital Relay 03/03/1948 Rev. 1 USA
SM 4506 DNL-41 Undervoltage Relay 02/10/1948 Retired USA
SM 2378J DP-25 Polarized Relay without Magnetic Blowout Contacts 12/09/1947 Original USA
SM 1706 NF & NF-2 Flasher Relays 04/21/1947 Original USA
SM 5423 P-4 Single Point Code-Following Relay 04/01/1947 Original USA
SM 5464 P-10 2-Point Code Following Relay 06/05/1946 Retired USA
SM 5447 P-4 Single Point Code Following Relay for Centralized Traff Control (CTC) SystemP-4 Single Point Code Following Relay for CTC Sys. 11/14/1945 Rev. 1 USA
SM 2666F DN-22 Track Relay (TR) for Primary-Secondary Relay CombinationDN-22 TR for Primary-Secondary Relay Combination 09/14/1945 Original USA
SM 3269 DNL-46L, DNL-46E 2-Rate Charge Relays 09/12/1945 Retired USA
SM 2666H DN-22 & DN-22A Relays with Heavy Duty Front Contacts 09/04/1945 Original USA
SM 3166A PN-50L Plug-In Type Lightout Relay 09/04/1945 Retired USA
SM 5026 M-2 Electric Switch & Lock MovementM-2 Elect. Switch & Lock Movement 09/01/1945 Retired USA
SM 1108 Model 12 Polarized Relays 08/27/1945 Original USA
SM 1188 Model 12 Interlocking Relay 08/27/1945 Original USA
SM 1706A NF & NF-2 Flasher Relays with Only Two Lamp Contacts in the Deenergized PositionNF & NF-2 Flasher Relays with Only Two Lamp Contacts Deenergized 08/22/1945 Original USA
SM 1188C Model 12 Interlocking Relay with Heavy Duty Back Contacts & Locking - Pawl - Operating SpringsModel 12 Relay with Heavy Duty Back Contacts & Locking - Pawl - Springs 08/10/1945 Original USA
SM 1109B Model 13 Quick Acting Relays 08/09/1945 Original USA
SM 1108A Model 12 DC Polarized Relay with High Voltage (HV) ContactsModel 12 DC Polarized Relay with HV Contacts 08/08/1945 Original USA
SM 2666C DN-22 Quick Acting Relays with Low Voltage (LV) ContactsDN-22 Quick Acting Relays with LV Contacts 08/08/1945 Original USA
SM 1109 Model 13 DC Neutral Relays 08/07/1945 Rev. 8 USA
SM 1109A Model 13 DC Neutral Relays 08/07/1945 Original USA
SM 1109C Model 13 DC Neutral Relay with High Voltage (HV) ContactsModel 13 DC Neutral Relay with HV Contacts 08/07/1945 Original USA
SM 1107 9-C Type Relays 08/06/1945 Original USA
SM 1108B Model 12 DC Polarized Relay with Low Voltage (LV) Switch & Lock Movement Control ContactsModel 12 DC Relay with LV Switch & Lock Movement Cntrl Contacts 08/06/1945 Original USA
SM 1188A Model 12 Interlocking Relays with Pawl Returning Springs on Locking ArmsModel 12 Inter. Relays with Pawl Returning Springs on Locking Arms 08/06/1945 Original USA
SM 1188B Model 12 Interlocking Relay with High Voltage (HV) ContactsModel 12 Inter. Relay with HV Contacts 08/06/1945 Original USA
SM 2723 DNL-4 DC Approach Lighting Relay 08/01/1945 Original USA
SM 5457 P-4 Single Point Code Following Relay for Centralized Traffic Control (CTC)P-4 Single Point Code Following Relay for CTC 06/25/1945 Original USA
SM 3177A LP-53 Relays Special for W.A.B.Co. Decelostat ControlLP-53 Relays Special for W.A.B.Co. Decelostat Cntrl 07/11/1944 Retired USA
SM 5019 Style S AC & DC SignalsStyle S AC & DC SIG 06/01/1944 Retired USA
SM 5416 ML-10 Electric LockML-10 Elect. Lock 06/01/1944 Retired USA
SM 5417 T-20, T-21 Hand-Operated Switch MachinesT-20, T-21 Hand-Operated Sw. Mach. 03/30/2019 Rev. 4 USA
SM 3177B LP-53 Plug-in Relays Special for Indication CircuitsLP-53 Plug-in Relays Special for Indic. Circuits 04/04/1944 Retired USA
SM 1106 Direct Current Relays 11/23/1943 Original USA
SM 5065 Service Testing & Contact Adjustment of TV-20 RelayService Testing & Contact Adj. of TV-20 Relay 09/02/1943 Retired USA
SM 2666R DN-22A Neutral Relays (Russian) 07/17/1943 Retired USA
SM 2904 DC & TC Table Interlockers 05/06/1943 Retired USA
SM 1109D Model 13 DC Neutral Relays with Knife-Edge Back Contacts 01/12/1943 Original USA
SM 5035 M-22 & M-25 Electric Switch & Lock MovementM-22 & M-25 Elect. Switch & Lock Movement 01/01/1943 Retired USA
SM 2829A DD-24A DC Ground Detector Relay 09/24/1942 Retired USA
SM 5442 Timing Unit 05/21/1942 Retired USA
SM 3480 VT-10 Reactor (Substitute for DN-22L Relay) 05/06/1942 Original USA
SM 2351 Model 12 Electric LockModel 12 Elect. Lock 02/10/1942 Original USA
SM 2451 D.C. Propulsion Impedance Bond (2000 Amperes per Rail)D.C. Propulsion Impedance Bond (2000 Amp per Rail) 01/27/1942 Original USA
SM 3444 DC Switch Indicators Catalog Plates 12/22/1941 Retired USA
SM 2354 Gill Selectors 10/14/1941 Original USA
SM 2354A Timing Gill Selector Telegraph Type Calling Key 10/14/1941 Original USA
SM 5426 Code Meter PC 103402 08/15/1941 Retired USA
SM 2378E DP-14 Slow Release Switch & Lock Movement Control RelaysDP-14 Slow Release Switch & Lock Movement Cntrl Relays 07/03/1941 Original USA
SM 5420 Heavy Duty Circuit Controller with Point Detector for T-20, T-21 Switch MechanismsHeavy Duty Circuit Cntrl with Point Det. for T-20, T-21 Switches 07/01/1941 Original USA
SM 2536 Clockwork Time Releases 02/18/1941 Original USA
SM 1640 Style B Signal MotorsStyle B SIG Motors 10/28/1940 Original USA
SM 3131 Model 13 DC & Model 16 AC Indication MagnetsModel 13 DC & Model 16 AC Indic. Magnets 10/22/1940 Retired USA
SM 2374 ML-10 Electric Lock (Forced Drop Type)ML-10 Elect. Lock (Forced Drop Type) 10/16/1940 Original USA
SM 3132 Model 13 DC & Model 16 AC Indication Magnets using Adjustable Back Stop ScrewModel 13 DC & Model 16 AC Indic. Magnets Using Adj. Back Stop Screw 10/01/1940 Retired USA
SM 3292 Hall DC Motor Relay 06/05/1940 Retired USA
SM 3280 13.5 Volt, 1.1 Amp, RT-21 Union Rectifier with Micrometer Adjustment of Output Down to ZeroRT-21 Union Rectifier with Micrometer Adj. of Output 05/06/1940 Retired USA
SM 2822 E-P Train Stop (TS)E-P TS 04/24/1940 Original USA
SM 2735 TH Thermal Relay 04/08/1940 Retired USA
SM 1670 Model 13 Train Control (TC) Relay with Armature Hold-Down SpringsModel 13 TC Relay with Armature Hold-Down Springs 04/01/1940 Original USA
SM 3264 30 Volt, 3.0 Ampere Union Rectifier RP-2130 V, 3.0 Amp. Union Rectifier RP-21 03/01/1940 Retired USA
SM 3257 14 Volt, 1.5 Amp, Union Rectifier R3Q-20814 V, 1.5 Amp. Union Rectifier R3Q-208 02/08/1940 Retired USA
SM 3196 FN-16 Flasher Relay with 3N-3R Contacts 08/10/1939 Original USA
SM 3166 PN-50 Plug-In Type Neutral Relay 07/03/1939 Retired USA
SM 2444G DN-11L Lightout Relays 02/01/1939 Original USA
SM 2829 DD-24 DC Ground Detector Relay 01/18/1939 Retired USA
SM 2535 DN-10 Neutral Relays 12/06/1938 Original USA
SM 3018 RS-2 Rectifier 11/15/1937 Retired USA
SM 2925 DC Oscillating Code Transmitter (Tx)DC Oscillating Code Tx 09/02/1937 Retired USA
SM 2903 Z Impedance Bond for DC Propulsion 12/01/1936 Retired USA
SM 2864 12 Volt, 0.50 Amp. RQ-12 Union Recitifier12 Volt, 0.50 Amp. RQ-12 Union Recitifier 09/10/1936 Retired USA
SM 2865 Union Rectifier Style RV-10 for Operating ANL-2 Lightout Relay 09/10/1936 Retired USA
SM 2725 200 V.A. W-10 Track Transformer 08/14/1936 Retired USA
SM 2853 17.5 Volt, 1.2 Amp. Union Rectifier Style RQ-21 08/14/1936 Retired USA
SM 2842 300 VA Style W-10 Track Transformer 07/01/1936 Retired USA
SM 2798 AC Induction Motor-Driven Type "F" Circuit Controller 02/27/1936 Retired USA
SM 2418A Slot Magnet Assembly of T-2 D.C. SignalsSlot Magnet Assembly of T-2 D.C. SIG 08/01/1935 Original USA
SM 2683 AC Induction Motor Type "F" Circuit Controller 07/18/1935 Retired USA
SM 2753 120 Volt, 3.0 Amp, Style RP-81 Union Rectifier120 V, 3.0 Amp. Style RP-81 Union Rectifier 07/11/1935 Retired USA
SM 2736 24V Contactor Controller & TA-2 Thermal Relay 07/02/1935 Retired USA
SM 1819 Die Cast Armature Bracket Replacements 06/18/1935 Original USA
SM 2724 Union Rectifier Style RN-14 04/02/1935 Retired USA
SM 2714 24V Contactor Controller & OR-10 Overload Relay 02/20/1935 Retired USA
SM 2710 120 Volt, 2.25 Amp. Style RP-61 Union Rectifier120 V, 2.25 Amp. Style RP-61 Union Rectifier 02/01/1935 Retired USA
SM 2701 120 Volt, 1.25 Ampere Union Rectifier for Charging 110 Volt Battery. Style RP-41120 V, 1.25 Amp. Union Rectifier for Charging 110 V Battery. Style RP-41 01/11/1935 Retired USA
SM 2811 Z Impedance Bond for DC Propulsion 12/29/1934 Retired USA
SM 2181 Model 13 Slow Release Relay 08/13/1934 Original USA
SM 2806 DC Electro-Pneumatic (EP) RelayDC EP Relay 03/20/1934 Retired USA
SM 2790 25 V. A. Style NL-10 Transformer 220 Volts, 25 Cycle Primary 12 Volt, Secondary25 V. A. Style NL-10 Transformer 01/14/1934 Retired USA
SM 5016 Style M Electric Switch & Lock Movement (Installation & Maintentance)Style M Elect. Switch & Lock Movement (Inst. & Maint.) 01/01/1934 Retired USA
SM 2378A DP-14 Ordinary-Acting Relays with High Voltage (HV) Neutral ContactsDP-14 Ordinary-Acting Relays with HV Neutral Contacts 10/31/1933 Original USA
SM 5042 Inspection & Adjustment of the Normally Deenergized DC Switch Circuit ControllerInspect. & Adj. of Normally Deenergized DC Switch Circuit Cntrl 03/01/1933 Original USA
SM 2526 13.5 Volts, 1.1 Ampere Union Rectifier Style RT-2113.5 V, 1.1 Amp. Union Rectifier Style RT-21 01/12/1933 Original USA
SM 2096 3 Volt, 1.4 Amp Style RX-10 Rectifier (Spec 1591)3 V, 1.4 Amp. Style RX-10 Rectifier (Spec 1591) 01/11/1933 Original USA
SM 2369 3 Volts, 1.4 Amps Union Rectifier, Style RX-10 (New)3 V, 1.4 Amps Union Rectifier, Style RX-10 (New) 01/11/1933 Original USA
SM 2507 13.5 Volts, 1.1 Ampere Union Rectifier Style RX-2113.5 V, 1.1 Amp. Union Rectifier Style RX-21 01/11/1933 Original USA
SM 2428 D.C. Iron Clad Indication MagnetsD.C. Iron Clad Indic. Magnets 10/21/1932 Original USA
SM 1760 DNL-3 Relays 08/08/1932 Original USA
SM 2419 Hall Solenoid D.C. Electric Lock, Universal TypeHall Solenoid D.C. Elect. Lock, Universal Type 03/24/1932 Original USA
SM 5039 Style G Color Position Light SignalStyle G Color Position Light SIG 12/01/1931 Retired USA
SM 5084 Service Specification for Code Transmitter (Tx) & DistributorService Spec. for Code Tx & Distributor 09/23/1931 Retired USA
SM 2336 Model 15A Crossing Bell 05/08/1931 Original USA
SM 5015 Model 15 Vane Relay 04/01/1930 Original USA
SM 1970 Push Button Indicator (Multiple Unit Type)Push Button Indic. (Multiple Unit Type) 05/22/1929 Original USA
SM 5013 Maintenance of Style B AC & DC SignalsMaint. of Style B AC & DC SIG 05/01/1929 Retired USA
SM 5024 Application of Oil Buffers to Spring SwitchesApp. of Oil Buffers to Spring Switch 02/01/1929 Original USA
SM 5014 A-1 Electro-Pneumatic (EP) Switch & Lock Movement. & Style C Switch ValveA-1 EP Switch & Lock Movement. & Style C Switch Valve 11/01/1928 Retired USA
SM 5028 Searchlight Type Color Light Signals (Installation & Maintenance)Searchlight Type Color Light SIG (Inst. & Maint.) 10/01/1928 Retired USA
SM 1887 0.5 Second Model 13 DC Slow Acting Relay for AC Track Circuit (TC)0.5 Second Model 13 DC Slow Acting Relay for AC TC 05/19/1928 Original USA
SM 1870 Model 13 DC Quick Acting Neutral Relay with Magnetic Armature LockModel 13 DC Quick Acting Neutral Relay - Magnetic Armature Lock 04/16/1928 Original USA
SM 5008 T-2 DC SignalT-2 DC SIG 04/01/1928 Retired USA
SM 5020A Style RT Rectifier 03/02/1928 Retired USA
SM 1644 Hall Style K Single Coil D.C. Neutral Relay Low Voltage (LV) ContactsHall Style K Single Coil D.C. Neutral Relay LV Contacts 02/23/1928 Original USA
SM 5020 Union Style RT-10, RT-11, RT-22 Rectifiers 02/01/1928 Retired USA
SM 1823 Specification for Applying Hardened Stop Screws & Anvil Plates to "NF" Flasher RelaysSpec. for Applying Stop Screws & Anvil Plates to "NF" Relays 12/13/1927 Rev. 1 USA
SM 1779 Remodeling Model 14 Interlocking Machine to Eliminate Quick Switches from Switch LeversRemodeling Model 14 Inter. Machine 08/08/1927 Original USA
SM 1761 DNL & DNL-2 Relays 06/15/1927 Original USA
SM 5002 T-2 AC SignalT-2 AC SIG 04/01/1927 Retired USA
SM 1504 TV-20 Vane Type Relay - Service Testing & Contact AdjustmentTV-20 Vane Type Relay - Service Testing & Contact Adj. 06/01/1926 Rev. 1 USA
SM 1501 TV-21 Vane Type Relay - Service Testing & Contact AdjustmentTV-21 Vane Type Relay - Service Testing & Contact Adj. 05/26/1926 Rev. 1 USA
SM 5010 Style C Electro-Pneumatic (EP) Switch ValveStyle C EP Switch Valve 07/01/1923 Retired USA
SM 9020 Test Unit for the Electronic Circuit Controller (ECC)Test Unit for the ECC 09/01/2002 Original USA
SM 5044 A-5 Electro-Pneumatic Switch MachineA-5 Electro-Pneumatic Sw. Mach. 05/01/1984 Original USA
SM 6229 Classification Yard Alcohol Feed SystemClassification Yard Alcohol Feed Sys. 02/01/1984 Original USA
SM 6090 Calibration Procedures for Master-Group Yards 10/01/1977 Original USA
SM 5308 X-1 Exhaust Valve 12/01/1957 Retired USA
SM 5702 Chronograph 05/19/1955 Original USA
SM 5456 Testing of Large "ALNICO" Permanent Magnets 06/06/1949 Original USA
TM 10202 LED Transit Signals, Two Aspect, Part Number N44630103LED Transit Signals, Two Aspect 02/24/2016 Rev. 0 USA
SM 5481 M-3 & M-23A, M-23B Electric Switch Machine with Field-Wound Motor (Black Housing)M-3 & M-23A, M-23B Sw. Mach. with Field-Wound Motor (Black) 07/07/2009 Rev. 1 USA
SM 5929 PN-152SO Switch Overload Relay 11/01/2003 Rev. 2 USA
SM 5994 W-400 Transformers 05/07/2014 Rev. 3 USA
SM 6145 US & S Secondary Surge Suppressors (USSP)USSP 04/17/2012 Rev. 2 USA
SM 6239 Solid State (SS) Ground DetectorSS Ground Detector 09/01/2000 Rev. 3 USA
SM 6263 M-3, M-23A, M-23B Electric Switch Machines with Permanent Magnet MotorM-3, M-23A, M-23B Elect. Sw. Mach. with Permanent Magnet Motor 07/31/2014 Rev. 8 USA
SM 6299 ATT-20 Audio Track TransceiverATT-20 06/30/2008 Rev. 1 USA
SM 6348 DC Flasher Relay PN-150F 11/17/2003 Original USA
SM 6444 M-3 Electric Switch Machine Standard Low ProfileM-3 Elect. Sw. Mach. Standard Low Profile 12/16/2014 Rev. 3 USA
SM 7100 M-23E Switch & Lock Movement with Electronic Circuit Controller (ECC)M-23E Switch & Lock Movement with ECC 11/01/2001 Original USA
SM 8525 AC Lamp Driver, Hot Filament Checker (optional), Redundancy Printed Circuit Board (PCB) (optional)AC Lamp Driver, Hot Filament Checker, Redundancy PCB 04/23/2010 Rev. 3 USA
SM 9025 Solid State (SS) General Railway Signal (GRS)/Alstom Style Biased Code Responsive RelaySS GRS/Alstom Style Biased Code Responsive Relay 10/30/2013 Rev. 4 USA
SM 9027 Solid State (SS) Polar Stick General Railway Signal (GRS)/Alstom Style Code Responsive RelaySS Polar Stick GRS/Alstom Style Code Responsive Relay 04/26/2004 Rev. 2 USA
SM 9028 PC 250B Solid State (SS) Biased Code Following RelayPC 250B SS Biased Code Following Relay 06/16/2010 Rev. 3 USA
SM 9029 PC-250P Solid State (SS) Polar Stick Code Responsive RelayPC-250P SS Polar Stick Code Responsive Relay 09/01/2004 Rev. 2 USA
SM 9270 Electronic Biased Neutral Controller (EBNC)EBNC 11/01/2004 Original USA
SM 9412 PV-250E Electronic Vane Relay 08/04/2010 Rev. 1 USA
SM 9428 M-23E Switch Machine with Electronic Circuit Controller (ECC)M-23E Sw. Mach. with ECC 5/14/2014 Rev. 5 USA
SM 9488 Electronic Circuit Controllers (ECC) Chaining Modules - Input Isolation Module & Bipolar Output Isolation ModuleECC Chaining Modules - Input Iso. Module & Bipolar Output Iso. Module 06/01/2006 Original USA
SM 9662 M-3, M-23A, M-23B Electric Switch Machines with Permanent Magnet Motor & (ECC) & (MCU) or (EBNC)M-3, M-23A, M-23B with Permanent Magnet Motor & (ECC) & (MCU) or (EBNC) 04/08/2015 Rev. 3 USA
SM 9671 M-3, M-23A, M-23B Electric Switch Machine with Independent Point DetectionM-3, M-23A, M-23B Elect. Sw. Mach. with Independent Point Detection 01/24/2008 Original USA
SM 1D2.0004 Serial Link Isolator Units 04/09/2014 Rev. 1 USA
SM 4551M DC Magnetic Blowout, Heavy Duty Contact Relay PN-150BM 09/01/2000 Original USA
SM 4568A Solid State (SS) Replacement for the GRS/Alstom Type B, Size 2 Mechanical Code Transmitter (Tx)SS Replacement for the GRS/Alstom Type B, Size 2 Mechanical Code Tx 03/01/2003 Rev. 1 USA
SM 4568B PN-250CG Code Generator Description & InstallationPN-250CG Code Generator Descrip. & Inst. 07/10/2006 Rev. 1 USA
SM 4574A Vital Plug-In AC Vane Relay PV-250 11/01/2007 Rev. 1 USA
SM 4574B PV-250 2-element AC Vane Relay 01/01/1999 Original USA
SM 4574D Vital Plug-In AC Vane Relay PV-250 03/09/2009 Rev. 2 USA
SM 4574E PV-250 Vital Plug-In AC Vane Relay 03/01/2000 Original USA
SM 4574F PV-250 Track Relay (TR) (60 Hz, 115-Volt Local)PV-250 TR (60 Hz, 115-V Local) 04/07/2005 Rev. 3 USA
SM 4574G PV-250 2-Element AC Vane Relay 11/16/2004 Rev. 5 USA
SM 4596D D.C. Biased, 3-Position Vital Relay PN-150BD 05/01/2008 Rev. 1 USA
SM 4596E DC Biased Relay with Heavy Duty Contacts (2nd Gen) PN-150HD 05/01/2008 Rev. 1 USA
SM 4596G Magnetic Stick, D.C. Plug-In Relay PP-151 05/01/2008 Rev. 1 USA
SM 5A1.0001 Model 95 Highway Crossing (HC) Gate Mechanism with Electronic Gate Arm ControllerModel 95 HC Gate Mechanism with Electronic Gate Arm Controller 08/22/2012 Rev. 2 USA
SM 5A1.0002 Model 95 Electronic Gate Controller Retrofit KitModel 95 Electronic Gate Controller Retrofit Kit 03/22/2010 Rev. 1 USA
SM 6263-1 M-3 Switch Machine with Permanent Magnet Motor, European UseM-3 Sw. Mach. with Permanent Magnet Motor, European Use 03/01/2013 Rev. 4 USA
SM 6263A Electronic Circuit Controller (ECC) Upgrade KitECC Upgrade Kit 12/14/2012 Rev. 4 USA
SM 6495B Model 95 Highway Crossing (HC) Exit Gate Mechanism for QuadGate ApplicationModel 95 HC Exit Gate Mechanism for QuadGate App. 05/01/2006 Rev. 5 USA
SM 6495C Model 95 Maintenance Switch Retrofit Kit Installation/OperationModel 95 Maint. Switch Retrofit Kit Inst./Oper. 05/01/2006 Rev. 3 USA
SM 6495D Model 95 Power-Down (PD) Module Installation KitModel 95 PD Module Inst. Kit 07/26/2005 Original USA
SM 6498A PN-150EVT Vital Timer Relay with Test Jack 09/11/2009 Rev. 3 USA
SM 6498B PN-150EVT Slow Drop (SD) & PN-150EVT Delayed Pick Slow Drop (DPSD) Time Element (TE) RelayPN-150EVT SD & PN-150EVT DPSD TE Relay 09/11/2009 Rev. 6 USA
SM 6498C PN-150EVT Vital Timer Relay 07/16/2009 Rev. 2 USA
SM 6800N MicroLok II LED Signal System with the US & S LED12 Printed Circuit Board (PCB) (PN 4620440xx)MLK II LED SIG Sys. with the US & S LED12 PCB (PN 4620440xx) 06/01/2007 Original USA
SM 6810A Switch Machine Lock SML-24, Switch Machine Controller (SMC), Biased Neutral Switch Machine Controller SMC-BNSML-24, SMC, SMC-BN 03/23/2009 Rev. 6 USA
SM 6810B SML-110 Switch Machine Lock, PN-150SSR Solid State (SS) Relay PackageSML-110, PN-150SSR Package 08/19/2013 Rev. 2 USA
SM 6810C Switch Machine Lock SML-24, SML-24/36, 110/36, & Motor Reversing UnitSML-24, SML-24/36, 110/36, & Motor Reversing Unit 01/01/2002 Original USA
SM 6A2.0001 M-3 IPD, M-23A IPD Electric Switch Machines using ECC, & MCU or EBNCM-3 IPD, M-23A IPD Elect. Sw. Mach. using ECC, & MCU or EBNC 04/21/2015 Rev. 1 USA
SM 6A3.0001 Electronic Biased Neutral Controller (EBNC) Bipolar Driver ModuleEBNC Bipolar Driver Module 10/14/2009 Rev. 1 USA
SM 8A1.0001 Reset Module for Electronic Vane Relay 10/14/2009 Rev. 1 USA