GE IC697CPM790 Touch Panel

The GE IC697CPM790 is a Series 90-70 PLC power supply module developed by GE Fanuc (now part of Emerson Automation). It is designed to provide stable DC power and sequencing control signals for GE Series 90-70 programmable logic controller racks. The module installs directly into the leftmost power supply slot of the PLC rack and supplies power to the system backplane.

Core Functions

• Converts external AC/DC input power into regulated DC power for PLC modules.
• Provides +5 VDC power for CPU, I/O modules, and communication modules.
• Supplies logic-level sequencing signals required for proper PLC startup and operation.
• Supports single-rack operation and can also supply power to an additional expansion rack when system load requirements permit.

Technical Specifications

Design Features

• Wide-range AC/DC input capability
  Accepts both industrial AC sources and 125 VDC control power systems, making it suitable for various industrial environments.
• High reliability rack-mounted design
  Uses a slide-in module structure for easy installation and replacement within the Series 90-70 chassis.
• Integrated protection functions
  Includes electronic protection against output overvoltage and overcurrent conditions to protect PLC components.
• Power-fail ride-through capability
  Maintains stable output during short-duration input interruptions, helping prevent unnecessary PLC shutdowns.

Hardware Composition

The  IC697CPM790 mainly consists of:

• AC/DC input conversion section
  Handles incoming industrial power and performs power conditioning.
• Switch-mode power conversion circuit
  Generates regulated low-voltage DC output.
• Backplane power interface
  Provides +5 VDC supply and control sequencing signals through the rack connector.
• Protection and monitoring circuitry
  Includes voltage/current protection and status indication functions.
• Rack mounting enclosure
  Provides mechanical support and electrical connection inside the Series 90-70 PLC rack.

Typical Applications

The GE IC697CPM790 is commonly used in:

• Industrial automation control systems
• Manufacturing production lines
• Process control equipment
• Power generation and utility automation
• Transportation control systems
• Legacy GE Series 90-70 PLC installations

It is especially suitable for applications where existing Series 90-70 PLC hardware must be maintained or upgraded without replacing the complete control platform.

Maintenance Considerations

• Verify input voltage compatibility before installation.
• Monitor the +5 VDC output level to prevent PLC communication or CPU faults.
• Check cooling conditions and cabinet ventilation in high-temperature environments.
• When replacing a failed module, confirm rack power requirements and total load capacity.
• Because the Series 90-70 platform is a legacy control system, maintaining spare power supply modules is recommended for critical installations.

Overall Evaluation

The GE IC697CPM790 is a reliable industrial PLC power supply module designed for the GE Series 90-70 automation platform. With flexible AC/DC input support, stable 5 VDC output, and built-in protection functions, it provides dependable power for legacy PLC systems. Although it belongs to an older generation of automation hardware, it remains valuable in industrial facilities that continue operating Series 90-70 control systems and require compatible replacement components.