I/O modules

Technical Overview

The GE IC697ALG440 is a 16-channel high-level analog input expander module for the Series 90-70 programmable logic controller platform. This unit adds current loop input capacity when paired with a base converter module like the IC697ALG230 . You can daisy-chain up to seven expander modules per base converter, reaching a total of 120 analog input channels in a single subsystem . Each expander module requires a removable terminal board for field wiring and mechanical keying ensures correct replacement with similar module types .

This module converts 4 to 20 mA current signals into digital data for the CPU, presenting converted values as 16-bit 2’s complement data . The IC697ALG440 uses an analog multiplexer to connect inputs to the analog-to-digital converter one at a time . You must place this expander in the same rack and adjacent to the base converter . Configuration takes place through software, eliminating the need for any jumpers or DIP switches on the module . You can configure individual scaling factors per input channel using Windows or MS-DOS software .

Technical Specifications

Key Features

High-Channel-Density Expansion – This module supports 16 analog inputs, letting you scale the system up to 120 channels with multiple modules per base converter.

Software-Based Configuration – The module eliminates DIP switches and jumpers, simplifying setup and reducing configuration errors .

Individual Channel Scaling – You can configure per-module scaling factors for each expander, providing flexibility for different signal types and measurement ranges .

Built-In Diagnostics – The module offers error detection facilities, expander channel response detection, and module health monitoring for reliable operation .

Removable Terminal Board – Field wiring connects to a detachable terminal board, making installation and maintenance more efficient .

Applications

The GE IC697ALG440 suits process control, manufacturing automation, and monitoring systems requiring high-density analog current inputs. It performs reliably in chemical processing, power generation, and material handling applications where precise 4-20 mA signal acquisition is essential.

Details