Highlight:
                                                                                                                                                                                                                                                            Allen-Bradley SLC 500 processor module, 1746 1747 logic control board, PCB control board with warranty
                      

System Class:	SLC 500 / MicroLogix	Condition:	Grade-A Refurbished / Tested Used
Warranty:	6-12 Months	Memory Size:	16K / 32K / 64K
Comm Protocol:	DH+ / Ethernet / DH-485	Hardware Rev:	Ser A / B / C Available
Lead Time:	24-48 Hours Express	Shipping Term:	International Express（DHL/FEDEX/TNT/UPS/ARAMEX）/Sea Freight / Air Freight / International Special Line
Freight Charge:	For Industrial Equipment (E.G., PLC Modules, Inverters..), Shipping Cost Varies By Package Weight/Volume And Delivery Location. Contact Our Sales Team For A Customized Shipping Solution And Quote

System Class:	SLC 500 / MicroLogix
Condition:	Grade-A Refurbished / Tested Used
Warranty:	6-12 Months
Memory Size:	16K / 32K / 64K
Comm Protocol:	DH+ / Ethernet / DH-485
Hardware Rev:	Ser A / B / C Available
Lead Time:	24-48 Hours Express
Shipping Term:	International Express（DHL/FEDEX/TNT/UPS/ARAMEX）/Sea Freight / Air Freight / International Special Line
Freight Charge:	For Industrial Equipment (E.G., PLC Modules, Inverters..), Shipping Cost Varies By Package Weight/Volume And Delivery Location. Contact Our Sales Team For A Customized Shipping Solution And Quote

Original Allen-Bradley SLC 500 1746 1747 Processor Module Logic Board

Avoid catastrophic production stops with our certified spare boards for the discontinued Allen-Bradley SLC 500 and MicroLogix families. We specialize in hard-to-find 1746 and 1747 series CPU boards and internal PCBs. These legacy controllers are still vital for thousands of aging but functional industrial systems across North America. Our bench-tested components allow you to keep your legacy lines running reliably without the extreme cost of a full system migration.

Product Highlights

Critical Downtime Solution: Immediate stock of hard-to-find legacy processor boards.
Bench Tested: Every SLC board is verified using RSLogix 500 on original chassis.
Plug-in Replacement: Direct hardware swap for failed 1747-L54x and L55x modules.
Restored Logic: Cleared memory and updated internal capacitors for longevity.

Selection Table

Part Number	Description	Series	Comm Protocol
1747-L541	SLC 5/04 Processor 16K	1747	DH+ / RS-232
1747-L552	SLC 5/05 Processor 32K	1747	Ethernet / RS-232
1747-L532	SLC 5/03 Processor 16K	1747	DH-485 / RS-232
1746-A10	SLC 500 10-Slot Chassis Board	1746	Backplane Bus
1764-28BXB	MicroLogix 1500 LRP Board	1764	RS-232 / Channel 1

Application Fields

Old Manufacturing Lines: Maintaining 10-20 year old legacy factory automation.
Water Treatment: Supporting distributed PLC clusters using DH+ or DH-485.
Textile & Plastic: Repairing existing legacy extruders and looms.
Wood Processing: Managing simple logic for legacy sawmills and kilns.

Frequently Asked Questions

Is the internal battery new? Yes, we install fresh 1747-BA batteries on all SLC units.
Can you test my program? If you send the .RSS file, we can verify it on our test rig.
Refurbished or Used? Grade-A Refurbished: cleaned, tested, and components verified.
Support DH+ Protocol? Yes, 1747-L54x series modules are fully verified for DH+.
Packaging? Sealed in specialized static-dissipative boxes for air freight.
Is there a return policy? 30-day money-back if the hardware doesn't boot.