Description
NEW OPEN BOX CONDITION
ABB RER 103 Bus Connection Module. The “0648D” is likely part of the specific manufacturing or serial code visible on the side of the unit in the image.
This module is designed to facilitate communication between ABB RE500 series devices and various fiber-optic networks.
- Function: It acts as an interfacing unit, converting incoming optical signals from SPA, LON®, or IEC 60870-5-103 buses into electrical RS-485 signals that the host device can use, and vice versa.
- Compatibility: The module plugs directly into the 9-pin D-type subminiature connector located on the rear plate of compatible RE500 devices.
- Topology: The RER 103 module supports both loop and star bus topologies, which can be configured using internal jumpers.
- Power: The unit is powered directly from the host device (5V dc)












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