IC694BEM331 (1) IC694BEM331 (2) IC694BEM331 (4) IC694BEM331 (3)

The GE IC694BEM331 is a specialized Genius Bus Controller module designed for GE Fanuc PACSystems RX3i automation platforms and legacy PLC environments that support Genius I/O networks. This module serves as the master interface between the RX3i controller and distributed Genius devices such as remote I/O blocks, VersaMax units, Field Control stations, and Genius Hand-Held Monitors. It enables high-speed, bi-directional data exchange across a serial bus, making it essential for systems that require reliable communication with multiple field devices on a Genius network.

Technical Specifications

Specification	Details
Module Type	Genius Bus Controller Module
Compatible PLC Series	GE Fanuc PACSystems RX3i (supports Genius bus)
Bus Protocol	Genius Serial I/O Bus
Master Type	Bus Controller (master)
Data Exchange Size	128 bytes per message
Configurable Baud Rates	38.4 Kbaud / 76.8 Kbaud / 153.5 Kbaud (standard/extended)
Max Devices on Bus	Up to 32 devices (16 at lowest baud)
Bus Types Supported	Twisted-pair + shield, Twinax, fiber optic cables, modems
Bus Termination	75 Ω, 100 Ω, 120 Ω, or 150 Ω at both ends
Power Requirements	5 VDC @ 300 mA max
Isolation	Hi-Pot 2000 VAC; transient common-mode 1500 VAC
Status Indicators	LED indicators for module / communication status
Mounting	Standard I/O rack/backplane slot
Operating Temp.	0 °C to +60 °C
Weight	~0.37 kg
Dimensions (L×W×H)	130 × 32 × 125 mm (approx., standard PLC module size)
Weight (approx.)	~0.50 kg

This module occupies one slot in the backplane and interfaces directly with the Genius serial bus, supporting robust industrial communications between multiple distributed devices.

Recommended Related Models

GE IC694CPU331 – Core CPU module for PACSystems RX3i PLCs
GE IC694PWR330 – High-capacity power supply module
GE IC693MDL752 – Standard 16-point digital input module
GE IC693DSM314 – High-density discrete output module

Popular GE PLC Modules

GE IC694ALG392 – 8-channel analog output module
GE IC694ALG442 – Mixed analog input/output module
GE IC693DNM200 – DeviceNet master communication module
GE IC693CMM311 – Serial communications interface module

Applications

The IC694BEM331 excels in scenarios where distributed I/O and remote devices must be tightly integrated into a central PLC system:

Distributed I/O networks using Genius protocol
Factory automation systems with remote field modules
Process control cabinets needing scalable communications
Integrated sensor/actuator networks spanning long cable distances
Retrofit projects connecting older Genius devices to modern PLCs

By enabling up to 32 devices on a single bus and transferring up to 128 bytes per scan, this bus controller supports complex automation systems with robust diagnostics and high data throughput.

Advantages

High-speed Genius communication with configurable baud rates
Support for large distributed networks with up to 32 devices
Advanced diagnostics and status LEDs for easier troubleshooting
Optical and transient isolation for industrial noise immunity
Flexible bus termination for varied cable types and lengths
Seamless integration with PACSystems RX3i and Genius I/O devices

This combination of features makes the IC694BEM331 a powerful choice for managing serial bus communications in multi-node industrial automation environments.

Technical FAQs
1. What does the IC694BEM331 module do?
  It acts as a master controller on a Genius serial bus, enabling communication between a PACSystems RX3i PLC and distributed Genius I/O devices.
2. How much data can it exchange per bus cycle?
  Up to 128 bytes of data per message.
3. What baud rates are supported?
  Configurable 38.4 Kbaud, 76.8 Kbaud, or 153.5 Kbaud.
4. How many devices can be connected on the Genius bus?
  Up to 32 devices at most baud rates; 16 devices at the lowest baud rate.
5. What type of bus cable can be used?
  Twisted-pair + shield, Twinax, fiber optic, or modem connections can be utilized.
6. Does it provide diagnostic feedback?
  Yes — LED indicators and advanced diagnostics help signal module and bus communication status.
7. What is the power requirement?
  5 VDC at up to 300 mA.
8. Is the module isolated?
  Yes — with 2000 VAC Hi-Pot and 1500 VAC transient isolation ratings.
9. Where is it installed in the PLC system?
  It installs in a standard backplane slot with no special slot restrictions.
10. What environments is the IC694BEM331 suited for?
  Industrial automation systems with distributed field I/O requiring robust serial bus communications.