Purchase now the 2085-OW16, a high-density 16-channel relay output expansion module designed to provide flexible switching for your Micro800 control system.
What Is the 2085-OW16?
The 2085-OW16 is a robust digital output module that features 16 independent relay contacts, allowing Allen-Bradley Micro850 and Micro870 controllers to interface with both AC and DC loads. Unlike solid-state modules, the relay architecture of the 2085-OW16 provides complete electrical isolation between the controller and the field devices, making it the ideal choice for switching solenoids, motor contactors, and high-wattage indicators. Each output is designed for high reliability, capable of handling varying voltage levels within the same module due to its group-isolated configuration.
Key Technical Specifications
- Number of Outputs: 16 Relay outputs (normally open)
- Operating Voltage Range: 5-265V AC / 5-125V DC
- Contact Rating: 2A per point (resistive)
- Total Module Current: 16A (max)
- Backplane Power: 5V DC (160mA) and 24V DC (130mA)
- Mechanical Life: 10,000,000 cycles (no load)
System Architecture and Compatibility
This module mounts on the right side of the Micro800 controller or expansion bank via the integrated 2085 bus connector. It utilizes the Connected Components Workbench (CCW) software for seamless logic mapping. The 2085-OW16 is particularly valuable in hybrid systems where the controller must activate heterogeneous loads, such as 120V AC alarms alongside 24V DC pneumatic valves. Its high-density design ensures that 16 relay points occupy minimal DIN rail space compared to traditional external relay racks.
Maintenance Tips
To maximize the operational lifespan of the 2085-OW16, it is critical to monitor the frequency of switching. Relay contacts are subject to physical wear; therefore, we recommend using external RC snubbers for AC inductive loads and flyback diodes for DC inductive loads to prevent contact pitting caused by electrical arcing. Periodically check the Removable Terminal Block (RTB) to ensure screws are tight, preventing localized heating from high-current loads.
Frequently Asked Questions
Q: Can I mix AC and DC voltages on the same 2085-OW16 module?
A: Yes, as long as you follow the grouping isolation rules defined in the Rockwell Automation wiring diagrams, you can switch different voltage types across different relay groups.
Q: What is the maximum current this module can handle across all outputs?
A: The module is rated for a maximum of 16 Amps total. Exceeding this limit can cause internal bus damage or excessive heat generation.
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