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The GE IC694ALG442, also cataloged as the IC694ALG442 Analog Combination Module, operates as a dedicated hardware component for 4-channel analog signal input acquisition and 2-channel analog signal output control within PACSystems RX3i platforms.

Hardware Specifications

Parameter Specification
Model IC694ALG442
Brand GE Fanuc / Emerson Automation
Origin USA
Weight 0.45 kg (1.00 lbs)
Dimensions Standard single-slot PACSystems RX3i format
Operating Temp 0 to 60 deg C
Power Consumption 95 mA @ 5 VDC backplane; 150 mA @ 24 VDC external supply
External Supply Voltage 20 to 30 VDC (24 VDC nominal, max 10% ripple)
Analog Inputs 4 differential channels
Analog Outputs 2 single-ended channels
Input Impedance 250 Ohms (current mode)
Resolution 12-bit digital resolution
Channel Update Rate 2 ms per channel
Overall Module Update Rate 3 ms
Input Accuracy +/- 0.25% of full scale @ 25 deg C
Output Accuracy +/- 0.1% of full scale @ 25 deg C (typical)
Enclosure Rating IP20

Backplane Bus Communication Velocity & I/O Density Scaling

The module executes high-density analog conversions across the RX3i backplane bus, maintaining deterministic bus communication velocity and continuous channel updates. Firmware flash compatibility supports seamless software configuration via Machine Edition software, providing individual channel parameter scaling, open-wire detection, and user-configurable output behavior (Hold last state or Downscale to minimum range) during host CPU stop conditions.

Frequently Asked Questions

Q: What are the dual power supply current demands for the IC694ALG442 module?

A: The module draws 95 mA from the internal +5 VDC backplane bus and 150 mA from an external 24 VDC user power supply.

Q: How do the output channels react when the controller enters Stop mode?

A: Each output channel can be configured in Proficy Machine Edition to either Hold its last state or Downscale to the lowest value in the selected signal range.

Q: Is the IC694ALG442 compatible with legacy Series 90-30 system backplanes?

A: Yes, the module can be installed in Series 90-30 PLC backplanes, drawing its required power from the 5 VDC supply rail.

Field Installation Guidelines

  • Backplane Insertion: De-energize system power before inserting the module into any available RX3i or Series 90-30 backplane slot, ensuring rear edge connectors lock completely into the backplane bus socket.
  • External Power Wiring: Connect an external 24 VDC power supply (20 to 30 VDC operating range) with less than 10% voltage ripple to the designated terminal block terminals.
  • Signal Cable Shielding: Use twisted, shielded pair wiring for all 4-20 mA and 0-10 VDC field loops. Terminate cable drain wires to the system ground bus bar to prevent high-frequency noise interference.
  • Inductive Load Routing: Route low-level analog input and output cables through separate wiring conduits away from AC power lines and motor drive outputs to avoid electromagnetic coupling.

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