Allen-Bradley

Allen-Bradley 1756-DHRIO ControlLogix DH Plus and RIO Communications Module

SKU 1756-DHRIO

In stock
  • 12-month warranty
  • Free returns within 30 days
  • Manufacturer: Allen-Bradley

  • Product No.: 1756-DHRIO

  • Country of origin:United States

  • Product Type: Communication Module

  • Payment: T/T, Western Union

  • Weight: 350g

  • Dimensions: 14.5 x 11.2 x 3.5 cm

  • Shipping port: Xiamen

  • Warranty: 12 months

Overview

The Allen-Bradley 1756-DHRIO is a dual-channel ControlLogix communication module for Data Highway Plus and Remote I/O networks.

The recorded specification includes 57.6, 115.2 and 230.4 Kbps rates, 32 DH+ messages per channel, and 32 logical RIO rack connections per channel.

Features

  • Dual-channel architecture supporting independent Data Highway Plus and Remote I/O network interfaces
  • Selectable communication rates of 57.6 Kbps, 115.2 Kbps, and 230.4 Kbps for flexible network integration
  • Handles up to 32 DH+ messages per channel and 32 logical rack connections per remote I/O channel
  • Backplane connectivity supporting message routing across a maximum of four chassis and eight communication hops
  • Compatible with standard Belden 9463 twinaxial cabling for noise-resistant long-distance data transmission

Technical Specifications

Parameter Specification
Brand Allen-Bradley
Catalog Number / SKU 1756-DHRIO
Module Type DH+ and Remote I/O Communication Module
Backplane Current Draw 1.7 mA at 5 VDC, 850 mA at 24 VDC
Power Dissipation 4.5 W max
Thermal Dissipation 15.4 BTU/hr max
Communication Rates 57.6 Kbps, 115.2 Kbps, 230.4 Kbps
DH+ Connections 32 messages per DH+ channel
RIO Connections 32 logical rack connections per RIO channel, 16 block-transfer connections
Logix Connections 32 max
Conductor Compatibility Belden 9463 twinaxial cable
Enclosure Type ControlLogix Single-Slot Module
Country of Origin United States

FAQ

What is the primary function of the Allen-Bradley 1756-DHRIO?

The 1756-DHRIO is a ControlLogix communication module used to bridge and transfer data between Data Highway Plus (DH+) networks, Remote I/O (RIO) links, and ControlLogix backplanes.

What communication baud rates does the 1756-DHRIO support?

The module supports communication rates of 57.6 Kbps, 115.2 Kbps, and 230.4 Kbps depending on the configured network type.

Can the 1756-DHRIO route messages across multiple chassis?

Yes, the module allows you to route messages through a maximum of four chassis and eight communication hops within a ControlLogix system architecture.

What type of cable is recommended for wiring the DH+ and RIO channels?

Belden 9463 twinaxial cable is the industry-standard recommended cable for connecting the communication module to DH+ and Remote I/O networks.

How much backplane current does the 1756-DHRIO require?

The module draws approximately 1.7 mA from the 5 VDC backplane rail and 850 mA from the 24 VDC backplane rail, with a maximum power dissipation of 4.5 W.

View all FAQs →

Product Documentation

Technical Datasheet (PDF) Complete specifications and technical drawings.

Technical Datasheet

Allen-Bradley 1756-DHRIO ControlLogix DH Plus and RIO Communications Module

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Shipping & Returns

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Returns & Warranty

  • 30-Day Guarantee: Returns accepted for in-stock products in original, factory-sealed packaging.
  • 12-Month Warranty: Every industrial component is backed by our technical warranty.
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Global Express Shipping

  • Standard Delivery: 4-6 Business Days via DHL, FedEx, and UPS.
  • Express Dispatch: Same-day dispatch for in-stock orders placed before 2:00 PM (GMT+8).
  • Worldwide Coverage: Serving over 150 countries, including rapid delivery to Saudi Arabia and UAE.

Returns & Warranty

  • 30-Day Guarantee: Returns accepted for in-stock products in original, factory-sealed packaging.
  • 12-Month Warranty: Every industrial component is backed by our professional technical warranty.

Orders are processed and delivered Monday-Friday (excluding public holidays).


For full eligibility, restocking fees, and international return details, please view our official Refund & Return Policy .

TECHNICAL SPECIFICATIONS

Country of origin
United States

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