GE Fanuc IC697ALG440 Current Expander Module

The GE Fanuc IC697ALG440 is a high-density current expansion module designed for the Series 90-70 Programmable Logic Controller platform. This module functions as an extension for analog output systems, specifically providing additional current-driven channels to manage field devices. It integrates seamlessly into the IC697 VME-based backplane, allowing the controller to drive actuators, recorders, and other analog instrumentation with high precision. By using this expander, engineers can significantly increase the I/O density of a single rack without occupying excessive space.

Versatile Current Output Functionality

The IC697ALG440 provides 16 differential current output channels. Each channel supports standard industrial ranges, typically operating between 4 to 20 mA or 0 to 20 mA. Because the module utilizes advanced digital-to-analog conversion technology, it maintains consistent signal integrity even in electrically noisy environments. This expander requires an external power supply to drive the current loops, ensuring that the PLC backplane remains protected from field-side electrical surges.

Technical Performance Data

• Module Type: Current Output Expander
• Number of Channels: 16 (Differential)
• Output Current Range: 4 to 20 mA / 0 to 20 mA
• Resolution: 12-bit
• Backplane Current Draw: 1.1 Amps (at 5V DC)
• External Power Required: +24V DC
• Isolation: 1500V Peak (between field and backplane)
• Calibration: Factory calibrated with software-based fine-tuning

Professional Installation and Compatibility

The IC697ALG440 occupies a single slot in any IC697 chassis. It interfaces with the CPU via the standard Series 90-70 VME bus architecture. For wiring, the module utilizes a removable terminal board, which allows technicians to replace hardware without disconnecting individual field wires. This design simplifies maintenance and reduces the risk of wiring errors during field service. Its rugged construction ensures long-term reliability in demanding industrial settings ranging from 0°C to 60°C.