Description
The GE Fanuc IC697BEM731 is a single-channel Genius I/O Bus Controller Module (BCM) designed for the Series 90-70 programmable logic controller family. Operating within a single slot of an IC697 rack, the module provides a high-speed communication interface connecting the Series 90-70 CPU to distributed Genius I/O blocks, remote racks, supervisory systems, and peer controllers over a serial Genius LAN network.
During normal operation, the IC697BEM731 asynchronously scans connected discrete and analog Genius I/O blocks, transferring input and output data directly across the VME backplane to the CPU once per scan sweep. The module supports directed communications initiated through CPU Communication Service Requests (COMMREQ), broadcast and point-to-point datagrams, and repetitive Global Data exchanges between multiple controllers and host computers.
System reliability is supported through built-in diagnostic monitoring linked directly to the Series 90-70 Alarm Processor function. Diagnostic alarms and bus faults are automatically captured, time-stamped, and queued into the PLC CPU fault table for real-time analysis and historical logging.
Features
- Single-channel serial interface providing communication across a Genius I/O network.
- Supports up to 30 distributed Genius I/O drops per channel within a 32-node address architecture (addresses 0 through 31).
- Configurable serial transmission speeds: 153.6 Kbaud standard, 153.6 Kbaud extended, 76.8 Kbaud, and 38.4 Kbaud.
- Front-mounted Hand-Held Monitor (HHM) serial port for local programming, testing, and diagnostics.
- Soft-configured directly through Series 90-70 programming software, eliminating physical hardware jumpers or DIP switches.
- Architecture support for redundant Genius bus cabling, redundant I/O blocks, and hot-standby redundant CPU systems.
- Global Data support for automatic, repetitive peer-to-peer data transfers between networked PLC controllers.
Technical Specifications
| Parameter |
Specification |
| Product Type |
Genius I/O Bus Controller Module (BCM) |
| PLC Platform |
GE Fanuc Series 90-70 |
| Backplane Interface |
VME Standard C.1 |
| Slot Requirement |
1 single slot (IC697 rack) |
| Current Draw |
1.3 A at 5 VDC from backplane bus |
| Number of Genius Channels |
1 serial channel |
| Maximum Bus Devices |
30 Genius I/O drops plus 1 bus controller (31 active devices total) |
| Bus Addressing Range |
0 to 31 (factory configuration defaults controller to address 31) |
| Supported Baud Rates |
153.6 Kbaud standard, 153.6 Kbaud extended, 76.8 Kbaud, 38.4 Kbaud |
| Maximum Cable Distance |
2000 ft at 153.6 Kbaud standard; up to 7500 ft at 38.4 Kbaud |
| Local Diagnostic Port |
1 Hand-Held Monitor (HHM) connector |
| Status Indicators |
Front-panel LED indicators (Module OK, Bus Communication status) |
| Configuration Method |
Soft configuration via CPU (Logicmaster 90-70 or Windows software) |
| Communication Modes |
Asynchronous I/O scanning, Global Data, Datagrams, Directed COMMREQ |
| Country of Origin |
United States |