The Allen Bradley 1771-OW16 is a PLC-5 series electromechanical relay output module designed for the 1771 I/O platform. It provides 16 individually switched relay contacts, capable of handling both AC and DC loads, making it one of the most versatile output modules in the PLC-5 family.
This module is commonly used in industrial control systems where electrical isolation, load flexibility, and multi-voltage switching are required.
Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | Allen Bradley (Rockwell Automation) |
| Catalog Number | 1771-OW16 |
| Module Type | Relay Contact Output Module |
| System Family | PLC-5 / 1771 I/O |
| Output Channels | 16 outputs |
| Output Type | Electromechanical relay contacts |
| Supported Voltage | 24–250V AC / 24–150V DC |
| Continuous Current per Point | up to 2 A |
| Maximum Module Load | ~500 VA AC / ~80 W DC per point |
| Contact Configuration | Form A (NO) + selectable contact groups |
| Contact Life Cycle | ~300,000 operations (typical) |
| Response Time | ~4–10 ms mechanical switching |
| Backplane Current Draw | ~1.3 A @ 5 V DC |
| Isolation | Individual relay isolation per channel |
| Arc Suppression | External RC snubber recommended |
| Wiring Arm | 1771-WN |
| Mounting Type | 1771 chassis slot |
| Operating Temperature | 0°C to 60°C |
| Storage Temperature | -40°C to 85°C |
| Weight | ~0.96 kg |
| Dimensions (L×W×H) | 326 mm × 242 mm × 53 mm |
System Role Overview
The 1771-OW16 module is designed for universal load switching in PLC-5 control systems. Unlike transistor-based outputs, its relay contacts allow direct switching of a wide range of AC and DC loads.
Core functions include:
- AC and DC load switching
- Industrial relay and contactor control
- Motor starter interface control
- Signal isolation between PLC and field devices
- Flexible output for mixed-voltage environments
Its electromechanical design makes it highly adaptable for legacy industrial systems.
Recommended Related Modules
| Model | Function |
|---|---|
| 1771-OQ16 | DC transistor output module |
| 1771-OBD | DC digital output module |
| 1771-OAD | AC output module |
| 1771-IBD | DC input module |
| 1771-IAD | AC input module |
| 1771-ASB | Remote I/O adapter |
Popular Allen Bradley PLC-5 Modules
| Model | Function |
|---|---|
| 1785-L40B | PLC-5 processor |
| 1771-A4B | 16-slot I/O chassis |
| 1771-DMC | Data Highway communication module |
| 1771-SN | I/O scanner module |
| 1771-ALX | Local I/O adapter module |
