GE Fanuc Series 90-70 IC697ALG320 4-Channel Analog Output Module

Technical Overview

The IC697ALG320 is a high-precision analog output module designed for the GE Fanuc Series 90-70 PLC ecosystem. This single-slot module provides four independent channels capable of converting digital data from the CPU into standardized voltage or current signals for controlling actuators, variable speed drives, and other process control instrumentation. It features a high-density design allowing for up to seven modules per rack, providing a maximum of 28 outputs per local chassis.

Hardware Specifications

Engineered for industrial reliability, the IC697ALG320 (Part Number: IC697ALG320) utilizes an onboard EEPROM to store factory calibration constants, eliminating the need for manual trimpot adjustments.

• Output Channels: 4 isolated channels

• Resolution: 16-bit hardware capability (14-bit monotonicity)

• Voltage Output Range: -10 VDC to +10 VDC (Default)

• Current Output Range: 4 to 20 mA (Default), 0 to 20 mA, or 0 to 22.5 mA

• Conversion Rate: 2.0 milliseconds for all channels

• Accuracy (Voltage): ±2.5 mV at full scale (10V)

• Accuracy (Current): ±5 µA at 4.0 mA and 20.0 mA

• Internal Power Consumption: 1.66 Amps at +5 VDC (8.3 Watts)

• External Power Requirement: 10 to 30 VDC (24 VDC nominal) for field-side current loops

• Module Width: Single slot in IC697 rack

Operational Characteristics

The IC697ALG320 offers flexible configuration via the MS-DOS or Windows-based programming software, removing the requirement for physical jumpers. Each channel is independently configurable for either voltage or current mode. The 16-bit resolution provides a step size of approximately 312.5 microvolts per LSB in voltage mode, ensuring smooth control transitions for sensitive applications. To maintain signal integrity in electrically noisy environments, it is recommended to use shielded twisted-pair cabling and ensure the module is seated in a properly grounded Series 90-70 rack.

Application Compatibility

This module is primarily utilized in heavy industrial sectors such as power generation and water treatment where the Series 90-70 backplane’s high-speed VME-based architecture is required. While the product is currently classified as discontinued by the manufacturer, it remains a critical component for maintaining legacy automated systems.