Allen-Bradley 1785-L40B PLC-5 Processor – Obsolete PLC-5 Spare Part

Name: Allen-Bradley 1785-L40B PLC-5 Processor – Obsolete PLC-5 Spare Part
Brand: Allen-Bradley

Model: 1785-L40B

Brand Allen-Bradley

Series PLC-5

Model 1785-L40B

RFQ-ready model route Obsolete and surplus sourcing Export follow-up by model list

Product Overview

Commercial availability is handled through direct RFQ, model verification and export-oriented follow-up rather than public cart checkout.

Submit RFQ Email This Model

Datasheet Preview

Use attached product manuals when available. If the manual is not public yet, request the full file directly through RFQ.

Request Full Manual

Commercial Path

Use This Page To Confirm The Model, Then Move To RFQ

Product pages on DRIVEKNMS are designed to verify model, brand and series first, then move the buyer into one clean quotation path.

Technical Dossier

Product Details And Specifications

Allen-Bradley 1785-L40B PLC-5 Processor – Obsolete PLC-5 Spare Part

RFQ support for obsolete parts: Send the model number, required quantity and destination so DriveKNMS can confirm sourcing options before quotation.

Technical Specifications

Parameter	Value
Manufacturer	Allen-Bradley (Rockwell Automation)
Part Number	1785-L40B
Series	PLC-5
Product Type	Programmable Logic Controller Processor
Discontinuation Status	End of Life (EOL) – No longer manufactured or supported by Rockwell Automation
Country of Origin	United States
Compatible Chassis	1771-series I/O chassis
Communication	DH+ (Data Highway Plus)
Compatible Software	RSLogix 5, 6200 Series Programming Software

Note: Electrical parameters such as memory size, scan time, and I/O capacity vary by firmware revision. DriveKNMS will confirm exact specifications against your system requirements upon inquiry. No parameters are stated here that cannot be verified against the physical unit.

Solving the Discontinued Hardware Crisis

The consequence is straightforward: every facility still running a PLC-5 system is operating on borrowed time. The processor is the single point of failure that cannot be worked around. When it fails, the entire controlled process stops — not a section of it, the entire process. There is no firmware patch, no software workaround, and no partial fix. The only options are a verified replacement 1785-L40B or a full system migration.

Condition & Reliability Assurance

DriveKNMS applies a 5-step quality assurance process to all obsolete processor units before dispatch review:

Units are shipped in anti-static packaging with desiccant. Condition grade (New, Refurbished-Grade-A, or Tested-Used) is disclosed on the invoice and confirmed before payment.

Continue The Model Path

Use system, brand and series routes to compare related published models.

Move from this exact model into the matching system hub, brand archive, model-family archive or lifecycle sourcing route before sending a final RFQ list.