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The GE IC697CPX772, also cataloged as the IC697CPX772 CPU module, operates as a dedicated hardware component for logic calculation and network processing within Series 90-70 PLC platforms. The unit relies on an internal 80486DX4 microprocessor to execute instruction routines across digital and analog I/O mappings over three front-panel serial connections.

Hardware Specifications

Parameter Specification
Model IC697CPX772
Brand GE Fanuc Emerson
Origin USA
Weight 0.74 kg (1.63 lbs)
Dimensions Single-slot rack width
Operating Temp 0 to 60 deg Celsius
Power Consumption 15.5 W (3.1 A @ 5 VDC)
Processor 80486DX4 Microprocessor
Clock Speed 96 MHz
Volatile Memory 512 KB User RAM
Non-Volatile Memory 256 KB Flash Memory
Boolean Execution Speed 0.4 microseconds per instruction
I/O Limits 2 K Discrete I/O (any combination), 8 K Words Analog I/O
Communication Ports 1x RS-232 (6-pin RJ-11), 2x RS-485 (including 1x optocoupler isolated)
Supported Protocols SNP Slave, Break-Free SNP (Slave), SNPX, RTU Serial
Backup Power Source IC697ACC701 Lithium Battery

Industrial Control and Network Determinism

The IC697CPX772 leverages dedicated backplane bus communication velocity capacities to manage real-world floating-point math calculations without degrading scan-time integrity. Through standard firmware flash compatibility, the processor schedules independent scan segments to process up to 8 K Words of analog data while enforcing deterministic protocol execution on the physical serial interfaces. This separate bus handling model regulates system response time and sustains high-density I/O scaling profiles.

Frequently Asked Questions

Q: What are the electrical isolation differences between the onboard RS-485 communication ports?

A: Port 2 provides embedded optocoupler electrical isolation to safeguard internal CPU logic against high common-mode voltages and external line faults on the RS-485 network. Port 3 operates as a non-isolated serial interface intended for localized programming or localized node connections.

Q: Can the IC697CPX772 CPU module be unseated or replaced while the rack power supply is energized?

A: No. Hot-swapping is not permitted on the Series 90-70 backplane. Upstream power sources feeding the 5 VDC rail must be fully isolated before module removal or insertion to protect memory arrays and physical connector pins.

Field Installation Guidelines

  • Enclosure Fan Matching Requirements: Due to the 3.1 A internal logic current draw, the hosting chassis must be paired with an active fan assembly layer (available in 120 VAC, 240 VAC, or 24 VDC variants) to guarantee stable convection and prevent localized heat stratification inside the enclosure.
  • Shielding and Grounding Infrastructure: Connect all incoming RS-232 and RS-485 data cables using fully shielded connectors. Land the external drain wire straight to the primary enclosure ground plane to minimize data block corruptions from induced electromagnetic transients.
  • Battery Maintenance Cycle: Ensure the IC697ACC701 lithium cell is verified periodically. When operating at baseline temperatures around 20 deg Celsius, the cell provides a 5-year shelf life and acts as the sole mechanism for retaining the 512 KB user RAM space during prolonged external power dropouts.

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