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

Availability: 5 left in stock

DescriptionThe Allen-Bradley 1756-DHRIO is a specialized communication interface module designed for the ControlLogix platform. This module functions as a bridge...

SKU: 1756-DHRIO

Manufacturer: Allen-Bradley
Product No.: 1756-DHRIO
Product Type: Communication Interface Module
Product Origin: USA
Payment:T/T, Western Union
Weight: 260g
Shipping port: Xiamen
Warranty: 12 months

Description Reviews

Description

The Allen-Bradley 1756-DHRIO is a specialized communication interface module designed for the ControlLogix platform. This module functions as a bridge between Data Highway Plus (DH+) networks and Remote I/O (RIO) links, facilitating seamless data exchange and connectivity within complex industrial control architectures. It is engineered to support both the polling of remote I/O and the messaging capabilities required for legacy network integration.

Features

Dual-channel communication interface for versatile network configuration.
Supports Data Highway Plus (DH+) and Remote I/O (RIO) protocols.
Selectable communication baud rates: 57.6 Kbaud, 115.2 Kbaud, and 230.4 Kbaud.
Integrates directly into the ControlLogix chassis, drawing power from the backplane.
Supports long-distance network cabling up to 3048 meters (10,000 feet) depending on the baud rate.

Technical Specifications

Module Type	Communication Interface Module
Power Consumption	850 mA at 24 VDC
Communication Rates	57.6, 115.2, 230.4 Kbaud
Max Cable Length	3048 m (10,000 ft)
Recommended Cable	Belden 89463 twinaxial (20 AWG)
Weight	0.26 kg

Installation Guidelines

Ensure the ControlLogix chassis is powered down before inserting or removing the 1756-DHRIO module to prevent electrical damage.
Align the module carefully with the chassis slot guides and seat it firmly to ensure proper backplane connection.
Use recommended Belden 89463 twinaxial cabling for optimal signal integrity and noise immunity.
Verify that the communication cable shield is properly grounded at one end to minimize EMI interference.
Maintain proper ventilation around the chassis to ensure the module operates within its specified temperature range.

FAQ

What is the primary function of the 1756-DHRIO module?

This module acts as a gateway, allowing a ControlLogix system to communicate with older legacy devices on a Data Highway Plus network or to act as a scanner for Remote I/O racks.

Can this module be hot-swapped?

While the ControlLogix system supports Removal and Insertion Under Power (RIUP), it is generally recommended to follow your specific plant safety protocols and ensure the module is not actively processing critical I/O before removal.

What cable is required for the DH+ network?

Allen-Bradley recommends using Belden 89463 twinaxial cable, which is rated for high-temperature environments and provides the necessary shielding for industrial network performance.

What's clients say about us

Excellent Emergency Support!

Our production line was down due to a faulty Bently Nevada monitor. We found it in stock here and they shipped it via DHL immediately. Back in operation within 48 hours—truly a lifesaver for our plant.

Mark Thompson

Maintenance Manager, USA

Reliable Source for New Spares

Finding brand new, original modules is critical for our safety. This team delivers factory-fresh components with full certification. Their commitment to only selling new products makes them our most trusted partner.

Robert Hoffmann

Engineering Lead, Germany

Top-tier Service and Quality

We have sourced Honeywell and Schneider parts here for two years. Every shipment arrives well-packaged with original factory seals intact. Clear communication and the best lead times in the industry.