WhatsApp: +86 16626708626
Email: 
Phone: +86 16626708626Description
Product Model: IC687BEM713C
Product Brand: GE Fanuc
Product Series: Series 90-70
Product Features:
- Half-slot bus transmitter / expansion module for 90-70 systems
- Enables addition of multiple expansion racks (up to seven) to main PLC rack
- High-speed parallel interface with ~500 kB/s effective data rate
- Supports redundancy or distributed I/O expansion with reliable communication
Technical Specifications Table
| Specification | Description |
|---|---|
| Model Number | IC687BEM713C |
| Brand | GE Fanuc |
| Series | Series 90-70 |
| Module Type | Bus Transmitter / Expansion Module (BTM / BEM) |
| Slot Size | Half-slot in main rack |
| Maximum Expansion Racks Supported | Up to 7 expansion racks |
| Effective Data Rate | ~500 kBytes/sec |
| Program Download Time (16 kB) | 20–30 seconds (typical) |
| Expansion Bus Cable Max Length | 50 ft (to last Bus Receiver Module) |
| Power Consumption | ~1.4 A at 5 V DC bus (typical for analogous modules) |
| Connectors | Parallel programming port + expansion port |
| Status Indicators | 3 LEDs: Module OK / Programmer Active / Expansion Bus Active |
| Compatibility | Series 90-70 CPUs, I/O modules, expansion racks, redundancy communication modules (RCM) |
- IC687BEM713C
- IC687BEM713C
Product Role & System Fit
The IC687BEM713C is not a sensor, not a discrete I/O card, and not a standard communication adapter—it is a Bus Transmitter / Expansion Interface Module for the GE Fanuc Series 90-70 PLC family. Its primary role is to extend the central PLC rack by allowing additional expansion racks to be linked via a bus structure. In effect, it becomes the “gateway” between the main CPU backplane and remote I/O or expansion racks.
In a typical configuration, the IC687BEM713C occupies a half-slot in the main rack (often slot reserved for expansion modules) and connects via a parallel bus link to one or more expansion racks. On the expansion side, bus-receiver modules (BRMs) are used to propagate signals further. This structural design means that once properly configured, engineers can add or remove racks depending on evolving automation needs.
For systems requiring redundancy, the module pairs with a redundancy communications module (RCM) to support hot-standby or redundant PLC architectures. In such setups, one BTM (Bus Transmitter Module) — i.e. IC687BEM713C — resides in each half of the redundant rack, ensuring mirrored communication paths to their respective RCMs.
Because of this role, the IC687BEM713C integrates seamlessly with legacy Series 90-70 CPUs, I/O modules, analog and digital cards, communication modules, and specialty cards. This compatibility makes it a preferred path for plants to expand or retrofit existing installations without rewriting logic or redesigning control programs.
In sum: IC687BEM713C is the linchpin of a flexible, scalable, and maintainable expansion architecture within GE Fanuc 90-70 systems.
