Is Your Control System Ready for a Flexible Relay Output Solution?
Downtime in industrial automation often traces back to output modules that cannot handle mixed voltage loads or lack the channel density your process demands. The Allen-Bradley 1769-OW16 answers that challenge head-on. This Compact I/O discrete output module delivers sixteen normally open relay contacts in a single slot, letting you drive AC and DC loads from one compact package.
What Is the 1769-OW16?
The 1769-OW16 belongs to the Allen-Bradley Compact I/O family and works with MicroLogix 1500 and CompactLogix controllers. It provides sixteen AC/DC normally open relay outputs arranged in two isolated groups of eight channels each. That isolation lets one group switch a different voltage category than the other, so you can mix applications without adding separate modules. The module occupies just one slot and draws power directly from the communication bus when installed in a CompactLogix or MicroLogix 1500 assembly.
Key Technical Specifications
The operating voltage range spans 5 to 265V AC and 5 to 125V DC, giving you broad flexibility across control circuits. Each output point handles up to 2.5A continuous current, while the module supports a maximum of 20A total. The signal delay is 10 ms for both on and off states, which suits most discrete control loops. Bus current draw is 125 mA at 5.1V and 100 mA at 24V. Heat dissipation is rated at 2.83 Watts. The module operates between 0 and 60 degrees Celsius and accepts solid wire from 22 to 14 AWG or stranded wire from 22 to 16 AWG.
Where the 1769-OW16 Fits Best
Mixed-Voltage Panel Builds
Because the two output groups are individually isolated, you can wire one group to a 24V DC pilot circuit and the other to a higher AC load. This reduces component count and panel space in OEM machines and retrofit projects.
MicroLogix 1500 Expansion
When used as expansion I/O, the module installs after the base unit or beside any adjacent Compact I/O module. The MicroLogix 1500 base can supply power directly, so no separate supply is needed in that configuration.
CompactLogix Local or Remote Racks
In a CompactLogix system, the 1769-OW16 acts as local or expansion I/O. It connects to the communication bus by locking the bus levers to an adjacent module, and it carries the supply voltage that powers the Compact I/O assembly.
Installation and Setup Notes
Mount the module on a panel or DIN rail. Keep it within eight modules of the power supply to respect the distance rating. Use only the 1769-PA2, 1769-PB2, 1769-PA4, or 1769-B4 power supplies when a separate supply is required. For wiring, strip solid 22-14 AWG or stranded 22-16 AWG copper-90 wire and land it on the 16-point terminal. The module ships open-style and weighs approximately 2 pounds.
Compatibility and Integration
The 1769-OW16 communicates over the MicroLogix or CompactLogix backplane. It also works in assemblies with a 1769-ADN DeviceNet adapter or a 1769-AENTR Ethernet adapter. Configuration parameters include module inhibition, packet interval, slot assignment, and revision number. You access these through the module’s input data files, which also store output status and diagnostics.
Maintenance and Reliability
Relay contacts are mechanical, so inspect them periodically for wear if your application switches inductive loads frequently. Verify terminal torque and check for dust buildup in the panel. The module tolerates 30G operating shock and 2G vibration, making it suitable for many industrial environments. Keep ambient temperature within 0 to 60 degrees Celsius and humidity between 5 and 95 percent non-condensing.
Selection Checklist Before You Buy
Confirm your controller platform supports Compact I/O. Verify that your load current per point stays at or below 2.5A and total module current at or below 20A. Check that your field wiring falls within the accepted AWG ranges. If you need a separate power supply, order one of the four compatible models listed above. SpareTechPLC stocks the 1769-OW16 and can help you confirm availability and lifecycle status before ordering.
Frequently Asked Questions
Can the 1769-OW16 switch both AC and DC loads on the same module?
Yes. The two output groups are individually isolated, so one group can switch AC while the other switches DC, as long as each stays within the operating voltage range.
Does this module require its own power supply?
It requires a separate supply except when connected to a MicroLogix 1500 base. Compatible supplies are the 1769-PA2, 1769-PB2, 1769-PA4, and 1769-B4.
What is the maximum current per output point?
Each point handles up to 2.5A continuous. The maximum per module is 20A.
How many modules can I place from the power supply?
The power supply distance rating is 8 modules.
What wire sizes does the terminal accept?
Solid wire from 22 to 14 AWG or stranded wire from 22 to 16 AWG.
