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Allen Bradley ControlLogix 1756-DHRIO/B

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1756-DHRIO/B

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The 1756-DHRIO/B module from Allen Bradley’s ControlLogix series is engineered for communication in distributed I/O systems. This DH+/Remote I/O communication module features two ports that can be individually set for either Remote I/O or DH+ connections, allowing flexible data interchange options.

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Rockwell Disclaimer: The product is used surplus. DO Supply is not an authorized surplus dealer or affiliate for the Manufacturer of this product. The product may have older date codes or be an older series than that available direct from the factory or authorized dealers. Because DO Supply is not an authorized distributor of this product, the Original Manufacturer's warranty does not apply. While many Allen-Bradley PLC products will have firmware already installed, DO Supply makes no representation as to whether a PLC product will or will not have firmware and, if it does have firmware, whether the firmware is the revision level that you need for your application. DO Supply also makes no representations as to your ability or right to download or otherwise obtain firmware for the product from Rockwell, its distributors, or any other source. DO Supply also makes no representations as to your right to install any such firmware on the product. DO Supply will not obtain or supply firmware on your behalf. It is your obligation to comply with the terms of any End-User License Agreement or similar document related to obtaining or installing firmware.

Technical specifications for 1756-DHRIO/B

ManufacturerAllen Bradley
Product TypeDH+/Remote I/O Communication Module
Product LineControlLogix
Part Number1756-DHRIO/B
Isolation Voltage30 Volts continuous, tested at 877 Volts DC for 60 seconds
Wire Size0.519 mm² (20 AWG)
Communication Rate57.6 Kbps, 115.2 Kbps, and 230.4 Kbps
Number of Ports2 individually selectable ports for Remote I/O or DH+
Current Draw at 5.1 Volts DC850 mA
Current Draw at 24 Volts DC1.7 mA
Power Dissipation4.5 W
Operating Temperature Range0 to 60°C
Storage Temperature Range-40 to 85°C
Humidity Range5 to 95% (non-condensing)
Connections Supported (Max.)32 Connections
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The Allen Bradley 1756-DHRIO/B is a versatile DH+/Remote I/O communication module designed for integration within ControlLogix systems. It provides two separately selectable ports, enhancing adaptability for specific communication needs. Users can select the desired protocol, either Remote I/O or DH+, to suit application requirements.

A crucial aspect of this module is its isolation voltage capability, with a continuous rating of 30 volts, which has been tested to endure an impressive 877 volts DC for 60 seconds, showcasing robust electrical safety measures. In terms of connectivity, it supports a maximum of 32 connections, making it effective for larger remote I/O setups.

The communication rates are configurable to 57.6 Kbps, 115.2 Kbps, or 230.4 Kbps, which allows for versatile data transfer speeds according to system demands. This module draws 850 mA of current at a voltage of 5.1 volts DC, while the current at 24 volts DC is substantially low at 1.7 mA, contributing to overall energy efficiency in operation.

For thermal performance, the device maintains functionality within a temperature range of 0°C to 60°C, ensuring reliability under varying thermal conditions. Moreover, storage temperature resilience ranges from -40°C to 85°C, providing ample tolerance for diverse operational environments. The module's humidity rating of 5 to 95% proves beneficial for applications in less-than-ideal conditions, emphasizing its flexibility in real-world scenarios.