Product Overview
The Allen-Bradley 1762-OW8 is a relay output module from the MicroLogix series by Rockwell Automation. It provides eight AC/DC relay outputs for use with MicroLogix 1100, 1200, and 1400 programmable logic controllers. This expansion module increases the I/O capacity of your control system, making it ideal for energizing contactors, relays, solenoids, pilot lamps, and alarm indicators.
Technical Specifications Breakdown
Key parameters for the 1762-OW8 are listed below for quick reference:
| Feature | Specification |
|---|---|
| Output Type | Eight (8) AC/DC Relay |
| Voltage Category | AC/DC Normally Open Relay |
| Operating Voltage Range | 5-265V AC; 5-125V DC |
| Max. Current per Point | 2.5 A |
| Number of Groups | Two (2) |
| Channels per Group | Four (4) |
| Signal Delay | 10 ms |
| Power Supply Distance Rating | 6 Modules |
| Mounting Type | DIN Rail; Panel Mounting |
| Heat Dissipation | 2.9 Total Watts |
| Shipping Weight | 228 g (0.50 lbs.) |
Industry Applications
This module excels in discrete control tasks. Use it to switch magnetic contactors in motor control centers, energize relay coils in safety circuits, or drive solenoid valves in material handling systems. The 2.5 A per point rating handles typical pilot devices and small loads. Compared to solid-state output modules, relay outputs offer galvanic isolation and handle both AC and DC loads, reducing the need for separate modules.
Installation & Setup Guidance
Mount the 1762-OW8 on a DIN rail or panel in a clean, dry environment with Pollution Degree 2 rating. Install it up to six modules away from the MicroLogix power supply. Connect the ribbon cable from the base controller or previous expansion module to the bus connector. Configure the module in your controller's hardware configuration before use. Use DIN rail end anchors in high-vibration environments.
Maintenance & Reliability
Relay outputs have mechanical contacts that wear over time. Inspect the module periodically for signs of arcing or contact welding. Keep the enclosure free of debris. The module dissipates 2.9 total watts, so ensure adequate ventilation. No special cleaning agents are required.
Compatibility & Integration
The 1762-OW8 is compatible with MicroLogix 1100, 1200, and 1400 controllers. It integrates via the MicroLogix backplane ribbon cable. No additional communication protocols are needed.
Selection Guide & Purchasing Advice
When selecting a relay output module, consider the number of outputs, voltage range, and current requirements. The 1762-OW8 offers eight normally open relay outputs with a wide operating range. For higher current or different configurations, explore other Bulletin 1762 modules. Contact SpareTechPLC for current availability and lifecycle status.
Troubleshooting & Common Issues
If outputs fail to energize, check the ribbon cable connection and verify the module is recognized in the controller configuration. If a relay contacts stick, cycle power and inspect for debris. The 10 ms signal delay is normal for relay outputs; for faster switching, consider solid-state alternatives.
