Product Name:

Allen-Bradley 1756-DHRIO ControlLogix Data Highway Plus-Remote I/O Communication Interface Module

Product Description:

This module acts as a bridge or scanner, enabling communication between a ControlLogix controller and devices on two different networks:

Data Highway Plus (DH+) network: Connects to devices like programmable logic controllers (PLCs), operator interfaces, and drive controllers that use the DH+ protocol.
Remote I/O (RIO) network: Communicates with remote I/O chassis containing distributed input and output (I/O) points.

Product Parameters:

Supports both DH+ and RIO communication protocols
Offers two independent channels, each configurable for DH+ or RIO
DH+ communication speed: 57.6 kbps
RIO communication speed: 57.6 kbps, 115.2 kbps, or 230.4 kbps
Maximum connections: 32 per channel (DH+) or 32 logical racks/16 block transfers (RIO)

Specifications:

Termination resistors (150 and 82 ohms) and Belden 9463 cable (1770-CD) are required for wiring on a DH+ network.

Product Use:

Integrates DH+ and RIO networks into a ControlLogix system, allowing communication with a wider range of devices.
Provides remote I/O access for the ControlLogix controller, expanding its control capabilities beyond the local chassis.
Enables communication with legacy DH+ devices in newer ControlLogix systems.