SLC 500 Platform (Legacy) — Available Products
Allen-Bradley 1747-L531 SLC 500
$557.00
Allen-Bradley 1747-L542
$539.00
Allen-Bradley 1747-DPS2
$1,881.00
Allen-Bradley 1747-BA
$62.00
Allen-Bradley 1746-IM16/C
$171.00
Allen-Bradley 1746-IO8
$358.99
Allen-Bradley 1746-IV32
$157.00
Allen-Bradley 1747-L553 SLC 5/05
$3,577.00
Allen-Bradley 1747-SDN
$296.99
Allen-Bradley 1747-L514
$425.00
Allen-Bradley 1747-L552/C
$3,584.00
Allen-Bradley 1746-IB32
$182.00
Allen-Bradley 1746-HSCE
$303.99
Allen-Bradley 1746-NIO4I
$822.99
Allen-Bradley 1746-IA4
$375.99
Allen-Bradley 1746-HSCE2
$639.99
Allen-Bradley 1746-BAS
$3,454.99
Allen-Bradley 1746-FIO4V
$1,258.99
Allen-Bradley 1747-UIC
$2,076.00
Allen-Bradley 1747-M13
$152.99
Allen-Bradley 1747-SN
$183.99
Allen-Bradley 1747-M11
$132.99
Allen-Bradley 1746-OV32
$222.99
Allen-Bradley 1746-P2
$368.00
Allen-Bradley 1746-OW16
$407.99
Allen-Bradley 1746-OB16E
$228.99
Allen-Bradley 1747-L551
$2,096.99
Allen-Bradley 1746-NT8
$1,051.00
Allen-Bradley 1747-L543
$984.00
Allen-Bradley 1746-P4
$474.00
Allen-Bradley 1747-ASB
$321.99
Allen-Bradley 1747-L532
$779.99
Allen-Bradley 1747-L524
$419.99
Allen-Bradley 1747-L541
$683.99
Allen-Bradley 1746-OB32E
$877.00
Allen-Bradley 1746-P1
$275.00
Allen-Bradley 1746-OB16
$176.00
Allen-Bradley 1746-OB32
$279.00
Allen-Bradley 1746-OA8
$276.00
Allen-Bradley 1746-NI4
$240.99
Allen-Bradley 1746-NI8
$419.00
Allen-Bradley 1746-OA16
$242.99
Allen-Bradley 1746-NT4
$389.00
Allen-Bradley 1746-NIO4V
$271.99
Allen-Bradley 1746-A4
$312.00
Allen-Bradley 1746-IA8
$196.00
Allen-Bradley 1746-IA16
$182.99
Allen-Bradley 1746-IB16
$152.99
Allen-Bradley 1746-A7
$377.00
Allen-Bradley 1746-A13
$587.99
Allen Bradley 1746-OW8
$285.00
Allen-Bradley 1746-NI16I
$575.99
Allen-Bradley 1746-HSTP1
$285.99
Allen-Bradley 1746-OB8/A
$192.99
Allen-Bradley 1747-M2
$199.99
Allen-Bradley 1747-C13
$158.99
Allen-Bradley 1747-AIC
$343.99
Allen-Bradley 1747-CP3
$336.99
Allen-Bradley 1747-C10
$311.99
Allen-Bradley 1747-AENTR
$3,062.00
Allen-Bradley 1746-P3
$422.99
Allen-Bradley 1747-L511
$392.00
Allen-Bradley 1746-NR4
$424.00
Allen-Bradley 1746-NO4V
$562.99
Allen-Bradley 1746-NO4I
$647.99
Allen-Bradley 1746-NO8I
$3,133.99
Allen-Bradley 1746-NR8
$825.00
Allen-Bradley 1746-ITB16
$266.00
Allen-Bradley 1746-IV16
$157.99
Allen-Bradley 1746-IB8
$194.99
Allen-Bradley 1746-ITV16
$384.00
Allen-Bradley 1746-NI16V
$1,676.00
Allen-Bradley 1746-A10
$392.00
Allen-Bradley 1747-PIC
$516.00
Allen-Bradley 1746-OX8/A
$181.00
Allen-Bradley 1746-C9
$520.99
Allen-Bradley 1747-KE
$482.00
Allen-Bradley 1746-NO8V
$1,980.00
Allen-Bradley 1746-BTM
$1,180.99
Allen-Bradley 1747-DCM
$919.99
Allen-Bradley 1746-OG16
$1,074.99
Allen-Bradley 1746-OBP16
$293.00
Overview
The SLC 500 was Allen-Bradley's workhorse modular small-to-mid PLC platform for over two decades. Although officially discontinued, SLC 500 systems remain in service in countless plants. PALM stocks 1746 I/O modules, 1747 processors and accessories for sustaining maintenance and like-for-like replacement.
Machine down? We ship SLC 500 Platform (Legacy) parts the same day.
New, surplus, and refurbished Allen-Bradley inventory in stock. Request a quote or speak directly with an automation specialist for emergency sourcing.
Common Applications
- Sustaining maintenance of installed SLC 500 systems
- Spare/critical inventory programs
- Bridge installations during ControlLogix migrations
Common Faults
- CPU faults S:6 — code 0020 (math overflow), 0034 (BTW timeout)
- 1746 I/O module bad LED — backplane connector dirty or seated wrong
- Power supply 1746-P2/P4 — capacitor bulge after 15+ years
- DH+ network errors — terminator missing or duplicate node
- Channel 0 (DF1) cannot connect — wrong cable (1747-CP3 vs PM02)
Troubleshooting Basics
- RSLogix 500 → online → S2:6 (major fault code) and S2:11 (minor).
- Cross-reference fault code in pub 1747-RM001.
- Inspect 1746 I/O module seating — toggle each card and watch backplane LEDs.
- Test 1746-P2 power supply — DC outputs should read 5.1V and 24V at idle.
- For DH+ comms, verify terminators (150Ω) at both ends.
Replacement Options
PALM Parts Solution sources every SLC 500 Platform (Legacy) part in three conditions:
- New — sealed, factory-fresh stock
- Surplus — never installed, original packaging, full warranty
- Refurbished — bench-tested to OEM spec, 12-month warranty
Most orders ship same day from US warehouse stock. Critical machine-down requests can be expedited worldwide.
Migration Recommendations
Discontinued. See our SLC 500 Migration Guide. Recommended target: CompactLogix 5380 with 1492 wiring adapters.
Compatibility
- 1746 I/O modules in 1746-A4/A7/A10/A13 chassis
- 1747-CP3 / 1761-CBL-PM02 programming cables
- RSLogix 500 software
Advantages
- Drop-in replacement modules
- Tested with 30-day warranty
- RSLogix 500 program compatibility
Series in this family
1747-L20 through 1747-L55 SLC 500 processors.
1746 I/O — digital, analog, RTD, thermocouple, specialty.
Frequently Ordered Together
- 1746-P2 / P4 power supply
- 1746-IB16 / OB16 I/O modules
- 1746-A7 / A10 chassis
- 1747-CP3 programming cable
Compatible & related families
Why Buy From PALM Parts Solution
DHL, FedEx, UPS — door-to-door in 1-4 business days.
In-stock orders placed before 3pm ET ship the same day.
New, surplus and refurbished Allen-Bradley inventory ready to ship.
24/7 emergency sourcing for production-critical failures.
Custom pricing on volume, repair, and hard-to-find SKUs.
Talk to engineers, not call-center agents.
We hunt down discontinued and obsolete parts globally.
Lifecycle-end Allen-Bradley parts — sourced, tested, warrantied.
Buying guides & technical resources
Frequently asked questions
Is SLC 500 end-of-life?
Yes — SLC 500 reached EOL in 2017. PALM stocks refurbished 1746/1747 modules for sustaining maintenance.
Which software programs SLC 500?
RSLogix 500.
How do I migrate SLC 500 to Logix?
SLC 500 to CompactLogix/ControlLogix using Logix Designer's import tool plus 1492 wiring-system conversion modules to keep field wiring in place.