ABB RER103-MM Bus Connection Module

General Description

The RER103-MM is a bus connection module designed to interface RE_500 series devices with fibre-optic SPA, LON®, and IEC 60870-5-103 communication buses. It converts optical signals from the bus into RS-485 electrical signals, and vice versa.

This module plugs directly into the 9-pin RS-485 D-sub connector on the rear of RE_500 devices and draws power from the host unit. It also features a Service Pin for LON® nodes.

Construction

• Compact plastic-encased module

• Mounts directly to RE_500 rear panel

• Handles Rx (input) and Tx (output) fibre connections

• See manual 1MRS752089-MUM for fibre mounting instructions

Optical Connection Details

Electrical & Data Specifications

• Auxiliary Power: 5 V DC (powered from host)

• Power Consumption: Approx. 0.4 W

• Max Data Rate: 1.25 Mbps

Mechanical Dimensions

• Width: 35.0 mm

• Height: 73.0 mm

• Depth: 20.0 mm

Environmental Conditions

• Operating Temperature: –10 to +55°C

• Storage Temperature: –40 to +70°C

Type Designation

• Type: RER103

• Transmitter: Glass Fibre (M)

• Receiver: Glass Fibre (M)

• Ordering Number: RER103-MM

⚠ Note: The LON® Star-Coupler RER111 and IEC Star-Coupler 125 only support glass-glass and plastic-plastic fibre combinations.