The IC687BEM731 is a high-performance Genius Bus Controller designed by GE Automation and Controls, compatible with both Series 90-70 and PACSystems RX7i systems. This robust controller can facilitate communication with up to 31 additional devices across a single Genius communications bus, occupying a single slot on the PLC backplane. The IC687BEM731 interfaces seamlessly with a range of devices, including Genius I/O blocks, programmable logic controllers, Remote Drops for Series 90-70, Versamax I/O stations, Field Control stations, and various host devices requiring datagrams and Global data for effective communication.

Key capabilities of this controller include I/O diagnostics and support for redundant systems, addressing data transmission needs with options for datagrams and Global data. Communication channel rates can reach 153.6 kbaud when the maximum number of devices are connected, with a supported maximum bus length of 7500 feet; however, communication rates may decrease with increased bus lengths. The controller supports several bus types, including Daisy-chain configurations, shielded twisted pair (STP) cables, Twinax cables, and potentially fiber optic cables. While the IC687BEM731 can be installed at any location on the Genius bus, optimal performance is achieved when the device placement corresponds to its programmed device number, typically 31.

Installation involves powering down the rack, firmly securing the controller to the backplane, and establishing the required bus connections. Configuration of the IC687BEM731 is accomplished using the Machine Edition Logic Developer 5.0 software, version 5.0 with the second service pack or later, and each device on the Genius bus must be programmed individually utilizing either configuration software or Write Configuration COMMREQS.

This controller operates with a backplane voltage of 5 volts DC and requires a current of 1.3 amps from the backplane. The IC687BEM731 is outfitted with one serial port for a handheld monitor, enhancing usability in monitoring and diagnostics. Its technical excellence and versatility make it an essential component for advanced industrial automation and control applications.