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IC693CPU374
IC693CPU374
IC693CPU374-GU
IC693CPU374-GU

GE IC693CPU374-GV 90-30 PLC CPU Module Dual Ethernet

  • Model: IC693CPU374-GV
  • Brand: GE Fanuc (Emerson legacy)
  • Series: Series 90-30 PLC
  • Core Function: High-speed PLC logic + Ethernet control CPU
  • Product Type: CPU Module
  • Key Specs: 133 MHz CPU, 240 KB memory, dual Ethernet 10/100 Mbps
  • Condition: New Surplus / Tested Refurbished (varies by stock)
  • ⚠️ Note: Requires Series 90-30 rack + compatible PSU and firmware alignment
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Description

3. Key Technical Specifications

  • Processor: AMD SC520 / 586-class embedded CPU
  • Clock Speed: 133 MHz
  • User Memory: 240 KB (RAM + Flash configuration dependent)
  • Program Storage: Flash + battery-backed RAM
  • Ethernet Ports: 2 × RJ-45 (10/100 Mbps, auto-sensing)
  • Ethernet Architecture: Built-in switch (single IP handling)
  • Protocols: SRTP, Ethernet Global Data (EGD), Modbus TCP/IP
  • Serial Communication: RS-485 via power supply port (SNP/SNPX)
  • I/O Capacity: Up to 2048 discrete points (system dependent)
  • Scan Time: ~0.15 ms per 1K Boolean logic
  • Power Consumption: ~7.4 W @ 5 VDC
  • Baseplates Supported: Up to 8 (1 CPU + 7 expansion/remote)
  • Operating Temperature: 0°C to 60°C
  • Storage Temperature: -40°C to 85°C
  • Mounting: Single-slot Series 90-30 rack CPU slot
  • Diagnostics: RUN/STOP switch + LED status indicators
  • Battery Backup: Internal + optional external battery support

 

4. Product Introduction

The GE IC693CPU374-GV is a high-performance CPU module for the Series 90-30 PLC platform, designed for industrial automation systems requiring fast logic execution and integrated Ethernet communication. It functions as the central controller for distributed I/O architectures in manufacturing and process control environments.

This model integrates a 133 MHz processor with 240 KB memory and dual 10/100 Mbps Ethernet ports, enabling SCADA connectivity, peer-to-peer PLC communication, and real-time control without additional communication modules.

IC693CPU374
IC693CPU374-GV

 

5. Installation & Configuration Guide

 

Stage 1: Pre-Installation Preparation

⚠️ Safety First: Perform full system shutdown, apply LOTO, and confirm zero voltage on rack backplane and field circuits. Allow 5–10 minutes for capacitor discharge.

Tools Required: ESD wrist strap, PH1 screwdriver, multimeter, labeling tags, camera for configuration capture.

Data Backup:

  • Upload PLC program via Proficy Machine Edition
  • Record IP address, Ethernet settings, and serial parameters
  • Photograph rack layout, CPU slot, and wiring configuration

 

Stage 2: Removing the Old Module

  1. Disconnect Ethernet and RS-485 connections
  2. Label all communication cables
  3. Release rack locking mechanism
  4. Pull CPU straight out of backplane (no tilting)
  5. Inspect connector pins for oxidation or damage
  6. Verify rack power stability before replacement

⚠️ Note: Lateral force can damage the 90-30 backplane connector permanently.

 

Stage 3: Installing the New Module

  1. Confirm exact match: IC693CPU374-GV (firmware-critical revision)
  2. Apply ESD protection
  3. Insert CPU into Slot 1 of Series 90-30 rack
  4. Push until latch fully engages
  5. Reconnect Ethernet (dual RJ-45 ports)
  6. Restore RS-485 wiring via PSU interface

Self-Checklist:

  • CPU fully seated in Slot 1
  • Ethernet link LEDs active
  • IP configuration verified
  • Serial wiring polarity confirmed

 

Stage 4: Power-On & Testing

  1. Energize PLC rack (field devices isolated)
  2. Observe LED sequence (RUN / OK / FAULT)
  3. Connect engineering workstation (Proficy Machine Edition)
  4. Verify Ethernet communication (ping / SRTP session)
  5. Confirm firmware compatibility
  6. Download PLC program if required
  7. Perform full I/O scan test

⚠️ Troubleshooting Note:

  • Solid FAULT LED → firmware mismatch or corrupted memory image
  • No Ethernet link → IP conflict or port hardware failure
  • Intermittent comms → backplane voltage instability or grounding issue

Estimated commissioning time: 20–35 minutes (documented system)

 

6. Frequently Asked Questions (FAQ)

Is the IC693CPU374-GV hot-swappable?

No. The Series 90-30 CPU architecture does not support safe hot swapping. Removing it under power can crash the entire rack and corrupt memory.

What does the “-GV” suffix mean?

It typically indicates a manufacturing or firmware revision variant. Electrically compatible with CPU374 family, but firmware alignment must be verified before deployment.

Does this CPU support Ethernet programming?

Yes. It includes dual 10/100 Mbps Ethernet ports supporting SRTP and EGD protocols for SCADA, HMI, and engineering access.

Will I lose my program when replacing this CPU?

Yes, unless the logic is backed up externally or stored in non-volatile memory. Always perform a full upload before replacement.

What is the difference between CPU374 and CPU364?

CPU374 generally provides dual Ethernet ports and higher processing capability, while CPU364 typically includes a single Ethernet interface.

Is this still supported by GE/Emerson?

Hardware support is limited due to platform obsolescence. Most units are maintained through industrial surplus supply chains and third-party repair services.

What is the most common failure mode?

Field failures typically come from:

  • Battery-backed RAM loss
  • Ethernet PHY degradation
  • Backplane connector wear
  • Firmware mismatch after replacement

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