GE Fanuc IC600BF940 Local I/O Transmitter Module

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Product Overview

The IC600BF940 is a GE Fanuc Series Six local I/O transmitter module. It carries I/O bus signals from a Series Six rack to a downstream local I/O station, allowing I/O racks to be distributed across a control system rather than grouped at the CPU. The Series Six transmitter link uses a parallel I/O connection with a documented maximum of 500 ft (150 m) per link. A distinguishing feature of the IC600BF940 is its selectable status-byte generation. GE Fanuc documents this function for Series Six systems using an RPU, where the transmitter’s status byte can otherwise conflict with register assignments. The module also provides chain, parity, isolated-power and fault-enable status indications.

Technical Specifications

Key Highlights

• Local I/O transmitter for GE Fanuc Series Six systems
• Parallel I/O link supporting up to 500 ft (150 m) per connection
• Selectable normal or expanded I/O operation
• Isolated signal path with a DC-to-DC converter
• Configurable status-byte generation on the IC600BF940

Model Benefits

• Distributed I/O layout: Connects the rack I/O bus to a downstream local I/O station.
• Status visibility: Front-panel indicators show chain continuity, parity, isolated power and fault-enable status.
• Configuration flexibility: Normal and expanded modes accommodate different Series Six I/O-chain arrangements.
• RPU-specific control: The IC600BF940’s status-byte selection addresses a register conflict documented by GE Fanuc for certain RPU configurations.

Frequently Asked Questions

Q1. What is the IC600BF940’s primary function?
A1. It transmits Series Six rack I/O bus signals to a downstream local I/O station; it is not an analog input or output module.
Q2. How far can one local I/O transmitter link extend?
A2. The GE Fanuc Series Six manual specifies a maximum of 500 ft (150 m) for an individual parallel I/O transmitter link.
Q3. What is distinctive about the IC600BF940 in an RPU system?
A3. GE Fanuc documents a jumper that enables or disables status-byte generation to address a potential register conflict in certain RPU configurations.
Q4. Which operating modes does the Series Six I/O transmitter support?
A4. The documented modes are normal I/O and expanded I/O; expanded mode supports up to eight selectable main I/O chains per CPU.

Industries Served

• Manufacturing: Links local I/O stations across production lines and machine-control areas.
• Power generation: Supports distributed rack I/O in Series Six-based plant control systems.
• Oil and gas: Connects control-room and process-area I/O stations within the documented local-link distance.
• Chemical processing: Supports I/O distribution across continuous-process equipment and plant sections.

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