Allen Bradley 1756-DHRIO/C ControlLogix Remote I/O Communication Interface Module

Product Introduction

The Allen-Bradley 1756-DHRIO/C is a ControlLogix Remote I/O (RIO) communication interface module with dual-channel capability, designed for high-reliability data transfer between a ControlLogix chassis and remote I/O devices. This module provides redundant or parallel communication paths, ensuring deterministic real-time communication for distributed industrial automation systems.

The 1756-DHRIO/C is ideal for mission-critical applications where network uptime, reliability, and fast response are essential, such as in process control, manufacturing automation, and large-scale distributed control systems.

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Product Specifications

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Applications

• Provides dual-channel Remote I/O communication for ControlLogix systems

• Ensures deterministic, high-speed data transfer between controllers and remote I/O

• Applied in distributed control systems, manufacturing, and process automation

• Supports redundant or parallel communication paths to increase network reliability

• Ideal for mission-critical systems requiring continuous operation and data integrity

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Advantages

• Dual-channel design allows redundancy or parallel operation for improved reliability

• High backplane current support (850 mA @ 24 VDC) ensures stable operation of connected I/O modules

• Deterministic communication guarantees timely and accurate data exchange

• Compact module design simplifies installation in ControlLogix chassis

• Open-style mounting supports flexible industrial panel installation

• Designed for robust performance in distributed and critical automation networks

FAQ

1. What is the primary function of the 1756-DHRIO/C module?
   It provides dual-channel Remote I/O communication between a ControlLogix chassis and remote I/O devices.

2. How does the dual-channel capability improve reliability?
   It allows redundancy or parallel communication paths, ensuring continuous operation if one channel fails.

3. Can the module handle deterministic communication?
   Yes, it ensures real-time, reliable communication for industrial automation networks.

4. What types of systems use this module?
   It is used in distributed control systems, manufacturing automation, and process control applications.

5. Does the module support multiple remote I/O devices?
   Yes, it interfaces with multiple remote I/O nodes within a ControlLogix network.

6. How is the module powered?
   It draws 850 mA from a 24 VDC backplane supply.

7. Is it compatible with standard ControlLogix chassis?
   Yes, it integrates seamlessly with ControlLogix controllers and chassis.

8. Can it be used in open-style industrial panels?
   Yes, the module supports open-style mounting.

9. Does it generate significant heat?
   No, maximum power dissipation is 4.5 W, with thermal dissipation of 15.4 BTU/hr.

10. What are the advantages of using a DHRIO/C module?
    It provides high-speed, redundant, and deterministic communication for distributed ControlLogix networks.

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