Description
Product Model: GE IC693BEM331N
Product Brand: GE Fanuc / General Electric / Emerson
Product Series: Series 90-30 PLC I/O (Genius Bus)
Product Features:
• Genius Bus Controller (GBC) module for distributed I/O communication in Series 90-30 PLC systems.
• Supports communication with up to 31 Genius I/O devices and transfers up to 128 bytes per cycle.
• Integrated status LEDs for OK and COMM OK diagnostics.
• Backplane-powered at 5 VDC, <300 mA, suitable for industrial control cabinet use.
Technical Specifications Table
| Specification | Detail |
|---|---|
| Model | GE IC693BEM331N |
| Series | GE Fanuc Series 90-30 PLC |
| Module Type | Genius Bus Controller (GBC) |
| Bus Protocol | Genius Bus network |
| Supported Nodes | Up to 31 Genius I/O devices |
| Data Transfer | 128 bytes in/out per cycle |
| Power Supply | 5 VDC (backplane), <300 mA |
| Indicators | OK, COMM OK LEDs |
| Operating Temp | 0 – 60 °C |
| Humidity | 5–90 % non-condensing |
| Environment Rating | IP20 |
| Compatibility | Series 90-30 CPUs and Genius I/O blocks |
- IC693BEM331N
Product Role & System Fit
The GE IC693BEM331N is not an I/O point module but rather the communication interface that allows Series 90-30 PLCs to speak with the distributed I/O network. Specifically, it interfaces the PLC backplane to the Genius Bus network, enabling bi-directional data flow between the controller and remote I/O nodes such as discrete input/output blocks, analog modules, and special-purpose field devices.
Once installed in a Series 90-30 rack, the module uses the PLC’s 5 VDC backplane power supply (drawing less than 300 mA) and communicates over the Genius Bus protocol at standard data rates. Its support for up to 128-byte exchanges — both transmitted and received — ensures that significant I/O data can be shared in a single scan cycle. These bytes can map to multiple point states, analog values, or control flags, giving the PLC a comprehensive view of the distributed I/O without saturating the bus.
The module also works in systems that include remote I/O drops or legacy Series 90-70 racks connected via appropriate bus interface units. This flexibility means customers with mixed-generation hardware can integrate portions of their control network without costly rewiring.




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