Allen Bradley 1756-OB16I ControlLogix Isolated Digital Output Module

Product Introduction

The Allen-Bradley 1756-OB16I is a ControlLogix isolated digital output module designed for DC control applications that require enhanced electrical separation between the control system and field devices. As part of the ControlLogix I/O family, this module combines high channel density, flexible sink/source operation, and robust isolation, making it suitable for complex industrial control environments.

The 1756-OB16I is commonly selected for systems where protection against ground potential differences, electrical noise, or transient voltages is critical. By providing channel-to-backplane isolation, the module helps maintain signal integrity and improves overall system reliability, especially in installations with mixed power domains or sensitive control equipment.

Product Specifications

Applications

• Used for isolated control of DC actuators and interface devices, including relays, solenoid valves, and signaling equipment

• Suitable for systems with mixed grounding schemes where electrical separation is required to protect the controller

• Applied in process automation and manufacturing systems exposed to electrical noise or voltage transients

• Commonly implemented in material handling, packaging, and assembly lines requiring reliable DC output control

• Ideal for applications that demand high system integrity and protection against ground loops

Advantages

• Channel-to-backplane isolation significantly improves system protection and noise immunity

• Flexible sink/source output design supports a wide range of field device wiring methods

• 16-channel density optimizes ControlLogix chassis space and reduces hardware count

• Wide DC operating voltage range enhances compatibility with standard industrial power supplies

• Low power dissipation supports efficient thermal management inside control cabinets

• Designed for stable, long-term operation in demanding industrial environments

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