Reliance Electric 61C350 AutoMate 50 CPU Module

Description

Key Technical Specifications

Product Introduction & Supply Chain Strategy

The Reliance Electric 61C350 is the central processing unit (CPU) module for the legacy Reliance AutoMate 50 programmable logic controller system. Responsible for executing application ladder logic, processing real-time I/O scan routines, and handling system communications, this module serves as the primary intelligence hub for the AutoMate 50 chassis.

Stocking the 61C350 as New Surplus is a vital risk-mitigation strategy for steel plants, paper mills, and manufacturing facilities relying on legacy AutoMate 50 control systems. Because Rockwell Automation/Reliance has long discontinued this platform, acquiring a factory-fresh, unused CPU module prevents complete plant paralysis without requiring an emergency multi-hundred-thousand-dollar PLC retrofit. Sourcing genuine New Surplus avoids the severe risks of dried-out onboard capacitors, dead memory backup batteries, and degraded logic chips common in second-hand or refurbished boards.

Installation & Configuration Guide

1.Pre-Installation (Prep & Safety):LOTO, memory backup, and ESD preparation.

Isolate primary power to the AutoMate 50 chassis using lock-out/tag-out (LOTO) procedures. Put on a grounded ESD wrist strap before handling the CPU module. If replacing an existing unit that is still partially functional, upload and back up the current application program to avoid loss of ladder logic and configuration parameters.

2.Removal:Removing the failing CPU module.

Disconnect any front-panel communication cables or programming interface harnesses. Loosen top and bottom card cage retaining screws securing the 61C350 module in the chassis slot. Carefully disengage the module from the rear backplane connector using the card ejector tabs and pull the module straight out along the chassis guide rails.

3.Installation (Clone & Seat):Inserting memory, DIP switches, and seating.

Inspect the rear edge connector on the new 61C350 for clean gold contact surfaces. If applicable, transfer the program memory chip/module (EPROM/RAM) or set onboard configuration DIP switches/jumpers to match the original CPU exactly. Install a fresh lithium memory backup battery. Slide the module into the designated CPU chassis slot and push firmly until fully seated, then tighten retaining screws.

4.Power-On & Testing:Power-on, logic download, and execution check.

Re-energize the AutoMate 50 chassis power supply. Observe the front-panel diagnostic LEDs: confirm the READY LED turns solid green and the CPU FAULT LED remains unlit. Download the application logic file via the programming terminal if using RAM memory, place the key switch or software mode into RUN, and verify normal I/O scan cycling across all connected racks.

61C350

61C350

61C350

Firmware/Software Versions & Upgrade Notes

• Software Compatibility: Programmed using Reliance AutoMate Executive / AutoMate Programming Software routines.
• Battery Maintenance: The 61C350 utilizes an onboard lithium backup battery to retain RAM application memory during power outages. Always install a fresh, tested battery prior to downloading application programs.
• Compatibility Caution: Never insert or pull the 61C350 CPU module while power is applied to the AutoMate 50 rack chassis. Performing a live card swap will create backplane voltage spikes that can permanently damage the CPU microprocessor and corrupt system memory.

Frequently Asked Questions (FAQ)

This product is a Brand New Surplus unit. It is not used, not pulled from a decommissioned plant, and not refurbished. All modules undergo rigorous quality verification to ensure OEM-level reliability.

Why choose New Surplus over a refurbished Reliance 61C350 CPU module?

CPU processor boards contain delicate microprocessors, bus transceivers, and electrolytic filter capacitors that degrade under years of continuous thermal stress. Refurbished or pulled cards often suffer from intermittent logic glitches, degraded trace solder joints, or failed memory retention circuits. Our New Surplus 61C350 modules offer factory-fresh components, pristine backplane contacts, and uncompromised operating life.

How do you verify the condition of the 61C350?

Our technical specialists conduct strict inbound inspections on every unit. We confirm zero insertion wear on the backplane gold edge connectors, check for pristine solder joints, verify clean faceplate plastics, and store all units in static-safe, climate-controlled packaging.

What function does the 61C350 serve in an AutoMate 50 system?

The 61C350 acts as the main brain of the system. It executes user ladder logic, manages internal flags and timers, coordinates data movement across I/O expansion racks, and interfaces with local operator terminals or programming devices.

Is the 61C350 still supported by Rockwell Automation / Reliance Electric?

No. The entire Reliance AutoMate product line is obsolete and no longer manufactured. Sourcing genuine New Surplus inventory is the primary method to keep existing lines running smoothly without incurring major migration costs.

What warranty is provided with this New Surplus CPU module?

We support this New Surplus Reliance Electric 61C350 module with a complete 1-year replacement warranty. If any functional or electrical defect arises under standard operating conditions within 12 months, we replace the unit directly from our stock.