Home › Manufacturers › Allen Bradley › 1756-DHRIOK

Allen Bradley

Allen Bradley 1756-DHRIO ControlLogix Communication Module

● In Stock 12-Mo Warranty Same-Day Dispatch Ships Worldwide 🎖 Veteran-Owned

In Stock — Ready to Ship

ManufacturerAllen Bradley

Part number1756-DHRIOK

Product Type Communication Module

Product Family CONTROLLOGIX

Communication Interface DH+ / RIO

Ports 2

Get a price for 1756-DHRIOK

Response within 1 business hour

🛡

12-month warranty

All units tested

⚡

Same-day dispatch

Order by 2pm CST

🌐

Worldwide delivery

US, EU, Asia, Middle East

🎖

Veteran-owned

CAGE: 9NK75

Dual Communication Channels Supports DH+ and RIO Protocols Integrates Legacy and Modern Systems High Communication Rates ControlLogix Backplane Compatible

Product description

The Allen-Bradley 1756-DHRIO is a ControlLogix communication module designed to connect Data Highway Plus (DH+) and Remote I/O (RIO) networks. It enables data exchange between ControlLogix controllers, PLC-5, and SLC systems. With dual channels, it can handle up to 32 Logix connections simultaneously and supports communication rates of 57.6, 115.2, and 230.4 Kbaud. This module is an essential bridge for integrating legacy and modern industrial devices.

This module is ideal for applications requiring communication between different generations of Allen-Bradley control systems, such as bridging modern Logix platforms with older network infrastructures. It is commonly used in manufacturing, material handling, and process control industries where maintaining communication with existing equipment is crucial.

Source your Allen-Bradley 1756-DHRIO from Stanlo Automation, a veteran-owned distributor committed to providing reliable surplus industrial parts. We ensure quality and availability, offering a cost-effective solution for your automation needs.

Technical specifications

Product Type	Communication Module
Product Family	CONTROLLOGIX
Communication Interface	DH+ / RIO
Ports	2
Data Rate	57.6 / 115.2 / 230.4 Kbaud
Current Draw @ 5.1V DC	850 mA
Current Draw @ 24V DC	1.7 mA
Isolation Voltage	30V (continuous)

Common applications

Industrial Automation

Manufacturing

Material Handling

Process Control

SCADA Networks

Legacy System Integration

Compatible systems

ControlLogix Controllers PLC-5 SLC 500

Also known as

1756-DHRIO/B 1756-DHRIO/C 1756-DHRIO/A 1756-DHRIOXT 1756DHRIOC

Replaces / compatible with

This module is designed to bridge modern Logix platforms with older Allen-Bradley network infrastructures. It is compatible with PLC-5 and SLC systems.

Technical note

Expert tip

The 1756-DHRIO module requires appropriate termination resistors (150 Ohm or 82 Ohm) and Belden 9463 cable for proper operation on a DH+ network.

What happens next?

Email confirmation

Immediate receipt acknowledgment sent to you

Account manager assigned

Confirms your part's spec and condition

Your quote delivered

Tailored to your specific requirements

Frequently asked questions

What are the communication capabilities of the Allen-Bradley 1756-DHRIO module?

The 1756-DHRIO module features two communication channels that can be individually selected for Data Highway Plus (DH+) or Remote I/O (RIO) operation. It supports various communication rates, including 57.6, 115.2, and 230.4 Kbaud, and can interface with ControlLogix controllers, PLC-5, and SLC systems.