Allen-Bradley 1786-RPCD | ControlNet Dual Copper Repeater Module

Overview

The 1786-RPCD from Allen-Bradley is a ControlNet dual copper repeater module designed to extend industrial ControlNet networks efficiently. It supports linear, star, and redundant topologies while providing reliable signal transmission over RG6 coaxial cables.

Ports and Connectivity

This module features two ControlNet coaxial ports, enabling flexible network configuration. It is compatible with the 1786-RPA/B repeater adapter, allowing up to four 1786-RPCD modules per adapter to extend communication distances.

Electrical Specifications

The 1786-RPCD receives 5V DC from the repeater adapter, with a backplane current draw of 400 mA. It has a maximum power consumption and dissipation of 2 Watts, ensuring stable operation in standard industrial environments.

Physical Specifications

This repeater module measures 101.2 mm × 111 mm × 69 mm (4.048 × 4.44 × 2.76 in.) and mounts easily on a 35 mm DIN rail. Its open-style enclosure requires installation in a protective industrial cabinet.

Operational Features

The 1786-RPCD supports typical repeater distances of up to 1 km. LED indicators for Channels 1 and 2 provide real-time status feedback, with green illumination indicating operational status and flashing green indicating active communication.

Network Implementation

This dual-port module is ideal for extending ControlNet segments and implementing isolated network sections. Unused ports require a 75 Ohm trunk line terminating resistor (1786-XT) to maintain signal integrity.

Environmental Specifications

The 1786-RPCD operates within a temperature range of 0°C to 60°C, making it suitable for a wide variety of industrial environments.