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57C435
57C435
57C435

Reliance Electric 57C435 AutoMax 7010 Processor Module

  • Model: 57C435
  • Brand: Reliance Electric
  • Series: AutoMax PLC
  • Core Function: Executes AutoMax control application programs
  • Product Type: Processor Module
  • Processor: Motorola 68020, 32-bit
  • CPU Speed: 25 MHz
  • Memory: 512K parity RAM
  • Serial Ports: 2 × RS-232C
  • Battery: 3.6 V lithium AA
  • Power Dissipation: 15 W maximum average
  • Lifecycle: Legacy / discontinued
  • Condition: New Surplus / Refurbished, depending on inventory

Rockwell Automation’s AutoMax documentation identifies 57C435 as the AutoMax 7010 Processor, with a 25 MHz Motorola 68020 processor and 512K parity RAM.

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Description

Key Technical Specifications

Parameter Value
Manufacturer Reliance Electric
Model 57C435
Product Family AutoMax
Product Type 7010 Processor Module
CPU Motorola 68020, 32-bit
CPU Speed 25 MHz
RAM 512K parity RAM
Programming Languages BASIC, Control Block, Ladder Logic
Serial Interface 2 × RS-232C
RS-232 Isolation 450 V
RS-232 Voltage ±12 V
Maximum Serial Current ±30 mA per channel
Battery 3.6 V lithium AA
Battery Capacity 2.0 Ah
Memory Retention with Battery 186 days minimum; 8.2 years typical
Memory Retention without Battery 10 minutes minimum; 10 hours typical
Maximum Power Dissipation 15 W average
Operating Temperature 0 to 60 °C
Storage Temperature −40 to 85 °C
Humidity 5–90% non-condensing
Dimensions 11.75 × 1.25 × 7.375 in
Instruction Manual J-3650

The original AutoMax processor manual confirms that the 57C435 is the 7010 processor, using a Motorola 68020 CPU at 25 MHz with 512K parity RAM. It also documents the battery-backed memory retention characteristics and RS-232 interfaces.

Rockwell’s AutoMax documentation also lists 57C435 as an AutoMax Processor and specifies approximately 3.0 A at 5 V, 0.1 A at −12 V, and 0.1 A at +12 V for power-supply sizing.

Product Introduction

The Reliance Electric 57C435 is an AutoMax 7010 Processor Module used in AutoMax control systems. It executes application programs written in BASIC, Control Block, or Ladder Logic and uses a 25 MHz Motorola 68020 processor with 512K parity RAM.

The module also provides two RS-232C serial ports for programming and peripheral communications. Its battery-backed RAM is critical to maintenance planning: the documentation specifies a minimum 186-day retention period with a healthy battery and only 10 minutes minimum without battery backup.

Installation & Configuration Guide

Stage 1: Pre-Installation Preparation

Estimated time: 20–30 minutes

⚠️ Safety First: Place the AutoMax system in the approved maintenance state. Follow site LOTO procedures before removing the processor from the rack.

Tools Required:

  • ESD wrist strap
  • Digital multimeter
  • Appropriate screwdriver
  • Smartphone/camera
  • AutoMax programming workstation
  • Current application backup
  • Replacement 3.6 V lithium AA battery if required

Data Backup:

  1. Record the complete 57C435 identification.
  2. Photograph the processor front panel and connectors.
  3. Record the rack and slot position.
  4. Back up the AutoMax application.
  5. Record processor configuration and communications settings.
  6. Document the RS-232 cable connections.
  7. Check and record battery status.

⚠️ Battery condition deserves special attention. The processor retains application memory through its battery-backed RAM. Do not remove the battery from a live system unless the applicable procedure specifically permits it.

Stage 2: Removing the Old Module

Estimated time: 10–20 minutes

  1. Place the controlled process in a safe state.
  2. Power down the AutoMax rack according to the maintenance procedure.
  3. Verify the rack supply has discharged.
  4. Record the processor’s exact slot.
  5. Label the two RS-232 connections.
  6. Disconnect communication cables carefully.
  7. Release the module retention hardware.
  8. Pull the processor straight out of the rack.
  9. Inspect the backplane connector.
  10. Keep the removed processor until the replacement has completed commissioning.

Stage 3: Installing the 57C435

Estimated time: 15–25 minutes

  1. Verify the replacement part number is 57C435.
  2. Compare the replacement hardware with the original.
  3. Check the battery installation and condition.
  4. Inspect the edge connector.
  5. Align the module with the rack guides.
  6. Insert the processor straight into the backplane.
  7. Fully seat the module.
  8. Secure the retention mechanism.
  9. Reconnect the RS-232 cables to their documented ports.

Self-Checklist:

  • 57C435 verified
  • Correct rack slot confirmed
  • Battery checked
  • Backplane connector inspected
  • Processor fully seated
  • RS-232 cables correctly identified
  • Retention mechanism secured

Stage 4: Power-On & Testing

Estimated time: 30–60 minutes

  1. Verify the rack before applying power.
  2. Restore power.
  3. Observe processor status and fault indicators.
  4. Allow the processor to complete its startup sequence.
  5. Connect the AutoMax programming workstation.
  6. Verify processor recognition.
  7. Check application memory.
  8. Load or restore the approved application if required.
  9. Verify RS-232 communications.
  10. Check processor diagnostics.
  11. Run the application under controlled conditions.
  12. Confirm communication with associated AutoMax modules.
  13. Verify machine operation before returning to production.

⚠️ Do not assume a replacement processor contains the customer’s application program. Hardware replacement and application restoration are separate tasks. Confirm the program backup before starting the swap.

57C435

57C435

57C435

57C435

Frequently Asked Questions (FAQ)

What is Reliance Electric 57C435?

The 57C435 is a Reliance Electric AutoMax 7010 Processor Module. It uses a 25 MHz Motorola 68020 processor and 512K parity RAM to execute AutoMax application programs.

What CPU does the 57C435 use?

The module uses a Motorola 68020 32-bit processor running at 25 MHz. The original AutoMax documentation distinguishes it from the 57C430A and 57C431 processors, which use the Motorola 68010 at 8 MHz.

How much memory does the 57C435 have?

The 57C435 has 512K of parity RAM.

How long does the 57C435 retain memory if power is removed?

With a functioning battery, the documentation specifies 186 days minimum and 8.2 years typical memory retention. Without the battery, the specified minimum is 10 minutes, with 10 hours typical. Battery condition therefore matters when storing or transporting the processor.

Does the 57C435 have serial ports?

Yes. It provides two RS-232C serial ports. The documentation specifies 450 V electrical isolation and ±12 V signaling.

Can I replace a 57C435 with a 57C431?

Do not treat them as drop-in equivalents. Both are AutoMax processors with 512K RAM, but the 57C431 is an 8 MHz 6011 processor, while the 57C435 is a 25 MHz 7010 processor based on the Motorola 68020. Verify application and system compatibility before substitution.

Is 57C435 obsolete?

It is a legacy AutoMax component and is no longer supported as a current-generation automation product. Secondary-market suppliers continue to list new-surplus and refurbished units. For example, current industrial inventory records identify 57C435 as a Reliance Electric AutoMax 7010 processor.

What should procurement verify before buying?

Specify the complete 57C435 part number and verify:

  • AutoMax 7010 processor designation
  • 25 MHz CPU
  • 512K parity RAM
  • Battery condition
  • RS-232 ports
  • Hardware revision
  • New Original / New Surplus / Refurbished condition
  • Functional test report
  • Warranty terms

For an operating AutoMax system, battery condition and application-program availability should be treated as separate procurement checks.

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