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Allen-Bradley 1756-DHRIOXT ControlNet Communication Module

Allen-Bradley 1756-DHRIOXT ControlNet Communication Module

Series#: AllenBradley

Product Details

1756-DHRIOXT Allen-Bradley ControlLogix Data Highway Plus (DH+) Remote I/O Communication Interface Module
Seamlessly integrates ControlLogix backplane with DH+ and Remote I/O networks for legacy and modern systems
Supports up to 57.6 kbps DH+ data rate and 115.2 kbps Remote I/O data rate for reliable fieldbus communication
Features dual-channel operation with independent network connections for redundant or isolated topologies
Includes built-in diagnostics via LEDs and RS-232 serial port for easy troubleshooting and configuration
100% Genuine and New, rigorously inspected before international dispatch.

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Specification

Datasheet (PDF)

The Allen-Bradley 1756-DHRIOXT is a high-performance communication interface module designed for the ControlLogix platform, enabling robust connectivity to Data Highway Plus (DH+) and Remote I/O networks. This module bridges the gap between modern control architectures and legacy field devices, supporting both DH+ and Remote I/O protocols simultaneously on two independent channels. Ideal for applications requiring integration of PLC-5, SLC 500, or other DH+ and RIO devices into a ControlLogix system, it ensures backward compatibility without sacrificing performance. Each channel operates at up to 57.6 kbps for DH+ and 115.2 kbps for Remote I/O, with support for redundant media and cable types. The 1756-DHRIOXT also features a dedicated RS-232 serial port for local configuration and diagnostics, along with status LEDs for network activity, module health, and channel-specific indicators. It is powered directly from the ControlLogix chassis backplane, eliminating the need for external power supplies, and is compatible with all ControLogix chassis and controllers.

Parameter	Specification
Product Type	Communication Interface Module
Model Number	1756-DHRIOXT
Network Protocols Supported	Data Highway Plus (DH+) and Remote I/O (RIO)
Number of Channels	2 (Independent, configurable per channel)
DH+ Data Rate	57.6 kbps (default, configurable to 115.2 kbps for RIO)
Remote I/O Data Rate	115.2 kbps (maximum)
Maximum DH+ Nodes per Channel	64 nodes (with proper cabling and repeaters)
Maximum Remote I/O Racks per Channel	Up to 16 racks (single or multiple chassis configurations)
Backplane Current Draw	1.5 A at 5.1 VDC (typical)
Power Dissipation	7.65 W (maximum)
Serial Port	1 x RS-232 (DB9 female) for configuration and diagnostics
LED Indicators	Module Status (MS), Network Status (NS), Channel 1/2 Activity, Channel 1/2 Fault, Serial Port Activity
Compatible Chassis	ControlLogix 1756-A4, A7, A10, A13, A17, A20, and all standard ControlLogix chassis
Compatible Controllers	ControlLogix 1756-L1, L2, L3, L4, L5, L6, L7 series controllers (firmware dependent)
Cable Type	Belden 9463 (DH+), Belden 3084A (RIO) or equivalent
Maximum Cable Length (DH+)	3,048 meters (10,000 feet) with proper termination
Maximum Cable Length (RIO)	3,048 meters (10,000 feet) with proper termination
Environmental Operating Temperature	0°C to 60°C (32°F to 140°F)
Environmental Storage Temperature	-40°C to 85°C (-40°F to 185°F)
Relative Humidity	5% to 95% non-condensing
Weight	0.45 kg (1.0 lb)
Certifications	UL, CSA, CE, ATEX (when installed in appropriate enclosure)