1756-OW16I Allen-Bradley ControlLogix Relay Output Module

Product Description

The Allen-Bradley 1756-OW16I, also identified as the 1756-OW16I relay output module, provides 16 individually isolated relay outputs for switching AC or DC electrical loads within the ControlLogix platform. It supports an AC voltage range of 10-240 V and a DC voltage range of 5-125 V. The module interfaces with the controller through the ControlLogix backplane.

Hardware Specifications

Relay Output Switching and Backplane Characteristics

The 1756-OW16I uses relay contacts to switch external AC or DC loads. Individual output isolation separates the output channels electrically according to the module's design. The specified maximum switching delay is 10 ms for both ON-to-OFF and OFF-to-ON transitions.

The module draws 150 mA from the 5.1 V backplane supply and 150 mA from the 24 V supply. These values should be included when calculating chassis power requirements. The listed total backplane power is 4.4 W, while thermal dissipation is 13.35 BTU/hr.

Frequently Asked Questions

Q: Can the 1756-OW16I switch both AC and DC loads?

A: Yes. The specified operating ranges are 10-240 V AC and 5-125 V DC. Confirm the load current and contact ratings in the official installation documentation before connecting field devices.

Q: What is the maximum output switching delay?

A: The specified maximum delay is 10 ms for both ON-to-OFF and OFF-to-ON transitions. Account for this delay when designing control sequences that depend on relay contact timing.

Q: How should the module's backplane power consumption be calculated?

A: Include the specified 150 mA draw at 5.1 V and 150 mA draw at 24 V in the chassis power budget. Verify the applicable power-supply loading limits against the ControlLogix chassis documentation.

Field Installation Guidelines

• Verify the module catalog number and chassis compatibility before installation.
• Isolate field power before wiring or servicing relay output circuits.
• Confirm the AC or DC voltage, load current, and external circuit protection requirements for each connected device.
• Route field wiring separately from low-level analog and communication wiring where practical.
• Apply grounding and shielding practices appropriate to the connected equipment and installation environment.
• Check terminal assignments and wiring diagrams against the official Allen-Bradley documentation before energizing the system.
• Verify output operation and relay switching behavior during commissioning.

Other Attributes

• Series: Allen-Bradley ControlLogix
• Country of Origin:  USA
• Lead Time: In Stock, 2 Working Days

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