ABB REB 103 Bus Connection Module

The ABB RER 103, also cataloged as the RER 103 Bus Connection Module, serves as the primary RER 103 interfacing unit utilized to execute physical signal conversion between fiber-optic network buses and electrical RS-485 serial ports across RE500 device platforms.

Hardware Specifications

Industrial Control and Drive Architecture

• Backplane Bus Communication Velocity The interface module links directly to the rear serial port of an RE500 terminal, matching transmission velocity across the local processing loop. It converts incoming light pulses to electrical square-wave lines with zero transit buffering, preserving real-time data rates for protection signaling.
• Profinet / EtherNet/IP Deterministic Networks By using fiber-optic lines to run legacy SPA, LON, or IEC_103 protocols, the unit isolates sub-station logic channels. This glass-media boundary blocks high-frequency electromagnetic fields, keeping deterministic communication links steady during heavy switchyard faults.
• I/O Density Scaling and Physical Mounting The hardware uses an integrated design that plugs straight onto the existing 9-pin D-type rear plate connector, eliminating the need for extra rack slots or rail allocations inside packed protection cubicles. This allows for simple channel scaling without changing the core panel layout.

Frequently Asked Questions

Q: Does the RER 103 connection module require an external 24 VDC power supply connection?

A: No. The RER 103 derives its internal logic and optical transceiver operating voltage directly from the pin assignments of the host RE500 device's 9-pin D-type connector, eliminating the need for separate external power wiring.

Q: Can this module be utilized on legacy third-party protection relays equipped with an RS-485 serial port?

A: No. The physical housing form factor and electrical pin configurations are engineered strictly to mate with the specific rear plate layout and communication firmware of ABB RE500 series terminal devices.