Allen-Bradley SLC 500 Parts
PLC • 42 parts available
SLC 500 remains widely installed in North American plants. This category covers 1746/1747 processors, I/O, and chassis components for maintenance and retrofit. Need repair? We offer PLC repair services.
Featured SLC 500 in stock
High-value Milwaukee inventory matched to this product line.
| Part Number | Description |
|---|---|
| 1747-L531 | Allen Bradley 1747-L531 /D SLC 500 5/03 CPU Processor 1747L531 · Used · $129.99 USD |
| 1747-L551 | Allen Bradley 1747-L551 SER C Rev C SLC500 Processor Unit (Genuine AB) - Refurb · Seller refurbished · $1,149.99 USD |
| 1747-L551 | Allen Bradley 1747-L551 /C SLC 500 Processor Unit OS501/C 1747L551 · Used · $1,099.99 USD |
| 1747-L552 | Allen Bradley 1747-L552 /C SLC 500 5/05 Processor 32K 1747L552 Ethernet Ser C · Used · $1,299.99 USD |
| 1747-L532 | Allen Bradley 1747-L532 SLC 500 5/03 CPU Processor 16K Memory 1747L532 Module · Used · $149.99 USD |
| 1747-L542 | Allen Bradley 1747-L542 /C SLC 500 Processor Module OS401/C + 1747-M12/A · Used · $149.99 USD |
| 1747-L542 | Allen Bradley 1747-L542 /C Proc. Rev 7 SLC 500 Processor Module OS401/C FRN 4 · Used · $149.99 USD |
| 1746-IV16 | Allen Bradley 1746-IV16 /C SLC 500 Input Module 459020-0211 - Open Box · New – Open box · $149.99 USD |
| 1747-L551 | Allen Bradley 1747-L551 /C SLC 500 5/05 CPU Processor 16K Memory 1747L551 Ser C · Used · $1,199.99 USD |
| 1747-L552 | Allen Bradley 1747-L552 /B SLC 500 Processor Unit + Key 1747L552 · Used · $1,199.99 USD |
| 1747-L551 | Allen Bradley 1747-L551 /B SLC 500 Processor Unit 1747-OS501 /C FRN 6 · Used · $1,249.99 USD |
| 1747-L553 | Allen Bradley 1747-L553 Ser B SLC 500 5/05 CPU Processor 64K Memory 1747L553 · Used · $1,299.99 USD |
| 1747-L553 | Allen Bradley 1747-L553 /C Rev B SLC 500 Processor Unit 64K 1747L553 SLC500 5/05 · Used · $1,539.99 USD |
| 1747-L552 | Allen Bradley 1747-L552 /D SLC 5/05 CPU Processor 32K Memory - Refurbished · Seller refurbished · $2,799.99 USD |
| 1746- FIO4V | SLC 500 Fast Analog Combination Module with TWO Fast Analog Inputs & TWO Analog Voltage Outputs |
| 1746-A7 | PLC Module I/O Chassis 7 Slot 1746 I/O Modules |
| 1746-IA16 | Allen Bradley SLC500 Input Module 1746-IA16 Series C /C |
| 1746-IA16-C | 1746-IA16/C 1746IA16C Allen Bradley 115V AC Digital Input SLC500 - USED+WARRANTY |
| 1746-IA8 | SLC 500 8-Channel General-Purpose 120V AC Digital Input Module |
| 1746-IA8K | 1746-IA8K: SLC 500 Digital Input Module, 8 Inputs, 120V AC |
| 1746-IA8KK | 1746-IA8KK: SLC 500 Digital Input Module, 8 Inputs, 120V AC, Conformal Coated |
| 1746-IB16 | 1746-IB16 /C Allen Bradley SLC 500 DC Input Module 1746IB16 |
| 1746-IO12 | 1746-IO12 SLC 500 Module 6-Inputs 120VAC 6-Relay N.O Outputs |
| 1746-IV16K | 1746-IV16K: SLC 500 Digital Input Module, 16 Inputs, 24V DC |
| 1746-IV16KK | 1746-IV16KK: SLC 500 Digital Input Module, 16 Inputs, 24V DC, Conformal Coated |
| 1746-IV32 | PLC Digital DC Input Module SLCT 500 ON=3 ms OFF=3 ms |
| 1746-NI8 | PLC Analog Input Module Voltage-Current 8 Inputs Input |
| 1746-NIO4I | PLC Analog I/O Module Voltage-Current 2 Inputs Input |
| 1746-NO4I | 1746-NO4I SLC 500 Analog Current Output Module, 4-Ch, Non-isolated |
| 1746-NO8I | 1746-NO8I SLC 500 Analog Current Output Module 8 Points |
| 1746-NR4 | PLC Analog Input Module RTD 4 Inputs Input |
| 1746-NT8 | Allen Bradley 1746-NT8 Thermocouple.SLC 8 Analogue Input Module Thermocouple |
| 1746-OA16 | PLC Digital AC Output Module SLCT 500 ON=1 ms OFF=11 ms |
| 1746-OB16 | PLC Digital DC Output Module SLCT 500 ON=0.1 ms OFF=1 ms |
| 1746-OBP16 | PLC Digital DC Output Module SLCT 500 ON=0.1 ms OFF=1 ms |
| 1746-OW16 | PLC Digital AC/DC Output Module SLCT 500 ON=10 ms OFF=10 ms |
| 1746-OX8 | PLC Digital AC/DC Output Module SLCT 500 ON=10 ms OFF=10 ms |
| 1746-P4 | SLC 500 Power Supply - 120/240V AC - 10 Amps With User Power, 70 Watt Max. |
| 1746-R14 | Rockwell Automation - 1746-R14 |
| 1746A13 | Allen-Bradley 1746-A13 Ser B SLC 500 PLC Chassis Rack |
| 1747-AENTR | Communication Interface Module 1 Ethernet RJ45 Category 5 |
| 1747-ASB | Allen Bradley 1747-ASB Ser A SLC 500 Remote I/O Adapter Module |
| 1747-BA | Lithium Battery Assembly For Ram Memory Retention 1747BA |
| 1747-L40C | Programmable Logic Controller 40 I/O 120/240VAC |
| 1747-L511 | Plc Processor 1 DH-485 1 Kb |
| 1747-L514 | SLC 500 SLC 5/01 Processor, 4K Memory, DH-485 Communication |
| 1747-L524 | Plc Processor 1 DH-485 4 Kb |
| 1747-L541 | SLC 500 SLC 5/04 CPU Processor, 16K Memory, DH+ & RS-232 Communication Ports |
| 1747-L543 | SLC 500 SLC 5/04 CPU Processor, 64K Memory, DH+ & RS-232 Communication Ports |
SLC 500 buying & repair guidance
Use the catalog string from the nameplate when ordering or quoting. Need a hand? Contact us or request a quote.
Common SLC 500 failures
- Processor memory or EEPROM faults
- 1747 communication module failures
- Power supply capacitor aging
- I/O module channel damage
Seeing these symptoms? PLC repair or search in-stock replacements.
Series & revision differences
5/03, 5/04, and 5/05 processors differ in memory and networking. Chassis size and slot count must match when swapping racks.
Confirm the full catalog and series before you buy. Condition & authenticity · Quote a specific series
Repair vs replace
Repair is common for SLC CPUs and I/O. Replace when migrating to CompactLogix/ControlLogix or when DH+ infrastructure is being retired.
Start a repair quote · Request a replacement quote · Search all inventory
Still have questions?
Find answers to shipping, warranties, repairs, and more.
Frequently Asked Questions
Do you stock Allen-Bradley SLC 500 parts?
Yes. NJT Automation maintains surplus and refurbished SLC 500 inventory in Milwaukee, with additional sourcing when a specific catalog number is not on the shelf. In-stock items above can ship the same business day when ordered by the cutoff.
Can you repair SLC 500 PLC hardware?
In most cases, yes. We offer mail-in repair with testing and a warranty. Send photos and the catalog/series from the nameplate for a repair quote, often faster than waiting on obsolete new stock.
What if my exact series letter is not listed?
Request a quote with the full catalog string and series from the nameplate. We can confirm whether a nearby series is compatible or source the exact revision you need.
How fast can SLC 500 parts ship?
In-stock Milwaukee inventory typically ships the same business day when ordered before the cutoff, with ground and expedited options. Local pickup can be arranged. Contact us to schedule.