Allen-Bradley 1746-OW16 SLC 500 Digital Contact Output Module

Product Overview

The Allen-Bradley 1746-OW16 is a digital contact output module from the SLC 500 series, designed for industrial automation systems requiring reliable switching of mixed voltage loads. This module features sixteen normally open (N.O.) relay contacts, organized into two groups of eight outputs per common terminal.

Technical Specifications Breakdown

Key parameters for the 1746-OW16 are listed below for quick reference:

Industry Applications

For example, in a packaging line, one group can switch 24VDC sensors while the other controls 120VAC motor contactors, simplifying wiring and reducing panel space. In material handling systems, the module’s 16 relay outputs can directly drive solenoid valves and indicator lights across different voltage domains, improving system reliability by minimizing external interposing circuits.

Installation & Setup Guidance

Install the module into any SLC 500 chassis slot. Use the removable terminal block for wiring—secure external connections with the provided sliding latches or screws. Ensure that the continuous current per module does not exceed 16A and that total module power stays below 1440VA. For inductive loads, install external surge suppression devices across each channel to protect relay contacts and extend module life.

Maintenance & Reliability

Periodically inspect the module for signs of chemical exposure, as chemicals can degrade sealing materials. Check that all terminal block connections remain tight. The module’s 10 ms signal delay (on and off at max resistive load) ensures predictable switching performance in time-critical applications.

Compatibility & Integration

The 1746-OW16 is fully compatible with the SLC 500 family of controllers and backplanes. It draws 170-180 milliamps from the backplane, which must be accounted for in system power budgeting. The two output groups can be independently configured for AC or DC loads, offering seamless integration into mixed-voltage control panels.

Selection Guide & Purchasing Advice

When selecting the 1746-OW16, verify that your application requires 16 relay outputs with common grouping. If you need higher current per output or isolated channels, consider other SLC 500 modules. AutoDCSTech stocks this module and can advise on lifecycle status and availability. Contact us before ordering to confirm stock and compatibility with your existing system.