GE IC693BEM331K | Genius Bus Controller Module

This bus controller module manages Genius I/O devices on a single network. It connects your Series 90-30 CPU to remote Genius blocks and field devices. The unit handles communication between the PLC and distributed I/O stations.

Technical specifications

Parameter	Specification
Brand	GE Intelligent Platforms
Model	GE IC693BEM331K
Product Family	Series 90-30
Category	Genius Bus Controller Module (BEM)
Network Protocol	Genius LAN
Baud Rates	153.6 kbaud (default), 38.4 kbaud, 76.8 kbaud
Maximum Devices	31 Genius devices per bus
Bus Cable Length	Up to 7,500 feet (2,286 meters)
Communication Type	Serial bus (shielded twisted pair)
Connector Type	15-pin D-sub (female)
Power Supply	5V DC from backplane
Current Consumption	600 mA from +5V backplane
Status Indicators	4 LEDs (PWR, LAN OK, COMM, FAULT)
Number of Components	1 PCB, 1 connector, 4 LEDs, 1 bus transceiver IC
Dimensions (L x W x H)	Approx. 14 cm x 11 cm x 3.5 cm
Weight	Approx. 0.36 kg
Energy Storage	None (no battery or capacitor)
Operating Temperature	0°C to 60°C
Compatible CPUs	IC693CPU311 and later

Detailed Technical Analysis

This bus controller module manages a network of Genius remote I/O blocks. It communicates at 153.6 kbaud for fast data exchange. The GE IC693BEM331K supports up to 31 devices on a single bus segment. You can extend the bus cable up to 7,500 feet without repeaters.

Now let us examine its communication features. The module uses shielded twisted-pair cable for reliable industrial networking. It automatically scans all connected Genius devices at startup. The unit then exchanges I/O data without burdening the main CPU. This architecture reduces scan time for large distributed systems.

The GE IC693BEM331K draws 600 milliamps from the 5V backplane supply. It contains no batteries or capacitors whatsoever. Four front-panel LEDs provide clear status information. The LAN OK LED confirms proper bus communication. A FAULT LED illuminates when a device fails or disconnects.

Installation and Wiring Guidelines

You mount this module into any Series 90-30 rack slot. Connect the Genius bus cable to the 15-pin D-sub port. Use Belden 9182 or equivalent shielded twisted-pair cable. Terminate both ends of the bus with 150-ohm resistors.

For large networks, you can place the GE IC693BEM331K in a remote rack. The module works with Genius hand-held monitors for diagnostics. Always keep the bus cable away from high-voltage AC lines. Proper shielding prevents communication errors in noisy environments.

Practical Applications

Engineers use this module for distributed I/O in large facilities. For example, you can place Genius blocks near the machinery they control. The GE IC693BEM331K also connects to variable frequency drives and operator panels. Its long cable reach suits automotive plants and material handling systems.

Summary

To conclude, this bus controller manages 31 Genius devices over 7,500 feet. It draws 600 mA from the backplane and weighs 0.36 kilograms. Choose GE IC693BEM331K for reliable distributed I/O in Series 90-30 systems.