I/O modules

Reliable Analog Input Acquisition for Series Six Systems

The GE IC600BF842 and IC600BF841 analog input modules serve as core signal acquisition components for the GE Fanuc Series Six PLC platform. These modules convert analog field signals into digital values for the CPU, enabling precise process monitoring and control. Industrial applications in manufacturing and energy management depend on these modules for accurate data acquisition.

Technical Specifications and Signal Ranges

The IC600BF842 module supports 8 input channels with a voltage range of -10 V to +10 V DC . The IC600BF841 module also provides 8 input channels but operates in a unipolar 0 V to +10 V DC range . Both modules achieve a 12-bit conversion resolution, ensuring reliable data representation . The modules accept current signals of 4 to 20 mA through front-panel connection adjustments .

Module Architecture and Circuit Design

The GE IC600BF842 and IC600BF841 incorporate multiple functional components within their circuit design. Each module includes an eight-to-one analog multiplexer, A/D conversion circuitry, and an opto-isolator for signal isolation . An address decoder and data-bus drivers manage communication with the CPU input status table . The modules support sequential and repetitive channel access for flexible data sampling .

Protective Features and Diagnostics

These modules integrate multiple protective and diagnostic mechanisms for reliable operation. Overrange and underrange detection circuitry monitors signal integrity continuously . Open-wire detection identifies broken sensor connections before they affect system performance . A “Board OK” LED provides visual status indication, with the LED remaining lit during normal operation and turning off upon A/D converter malfunction or power issues .

Installation and System Integration

You can install these analog input modules in I/O racks designed for Model 60 CPU racks or Series Six Plus CPU racks . The modules require DIP switch configuration to reserve 32 consecutive bits in the CPU input status table . Regular calibration every 90 days maintains performance accuracy . The circuit board measures 8.15 x 11 x 1.2 inches with an open enclosure design .

Accuracy and Environmental Ratings

The modules provide an accuracy rating of ±0.025% of full scale at 25°C . The common mode voltage operating range reaches 11 V maximum from inputs to SHD . The modules operate reliably at temperatures from 0°C to 60°C with relative humidity of 5% to 95% (non-condensing) . These specifications make the modules suitable for demanding industrial environments.

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