IC694ALG391 GE Fanuc PACSystems RX3i Analog Output Module

Product Overview

Configured for precise voltage and current signal generation in PACSystems RX3i networks, the GE Fanuc IC694ALG391 (IC694ALG391 Analog Output Module) provides direct physical/electrical execution. The hardware translates digital values written to internal processor registers into 2 independent channels of analog control output. Each channel operates autonomously to drive proportional field control mechanisms, including variable control valves, speed governors, and actuator loop inputs.

Hardware Specifications

I/O Density Scaling and Backplane Bus Communications

The structural design optimizes single-slot footprint efficiency to allow dense I/O density scaling inside standard RX3i chassis configurations. Digital-to-analog converter updates are driven via high-speed backplane bus communication velocity limits, updating field signal loops within millisecond execution brackets. The module configuration integrates comprehensive firmware flash compatibility profiles, guaranteeing data mapping stability across the primary controller architecture during dynamic multi-channel processing tasks.

Frequently Asked Questions

Q: How does the module handle output signal states when the central processing unit transitions to a STOP state?

A: The module can be programmed via the configuration software to execute one of two behaviors: either hold the last valid output value or force the analog signal channels to a predetermined default user-specified safety value.

Q: Is an external power source necessary to generate the 4-20 mA current loops?

A: Yes. While the internal backplane supplies the 5 VDC logic current, a separate external 24 VDC power supply must be wired to the module terminal block to drive the active current loop circuits and field loads.

Field Installation Guidelines

• Terminal Wiring Precision: Terminate analog signal wires using shielded twisted pairs to prevent electrical noise introduction. Route the field wires through the removable terminal block mechanism.
• Shield Grounding Regulations: Connect the cable drain wires to an external ground bar located within the enclosure. Do not ground the cable shield at both physical ends to avoid creating ground loops.
• Backplane Insertion: Slide the housing directly into the chassis slots along the guide rails. Secure the bottom faceplate screw to verify structural ground grounding continuity between the card shield and the backplane assembly.