Flexible Relay Output Performance for Reliable Industrial Control
The Allen Bradley 1746-OW8 SLC 500 Relay Output Module is a dependable relay-based output solution developed for the SLC 500 automation platform. Designed to control a wide variety of field devices, this module provides eight isolated relay outputs capable of switching both AC and DC loads, making it a versatile choice for industrial automation systems.
Its rugged relay architecture offers excellent load compatibility and operational flexibility, especially in applications where mixed-voltage devices are used. The 1746-OW8 is widely trusted in manufacturing, process control, utility systems, and machine automation environments where reliable output switching is essential for continuous operation.
Technical Specifications
| Parameter | Specification |
|---|
| Manufacturer | Allen Bradley |
| Model Number | 1746-OW8 |
| Module Type | Relay Output Module |
| Product Family | SLC 500 |
| Output Channels | 8 Relay Outputs |
| Contact Type | Normally Open Relay Contacts |
| Output Voltage Range | 5–265 V AC / 5–125 V DC |
| Continuous Current per Output | 2 A Maximum |
| Continuous Current per Module | 16 A Maximum |
| Contact Isolation | Individual Relay Isolation |
| Mechanical Life Expectancy | Up to 10 Million Operations |
| Electrical Life Expectancy | Load Dependent |
| Output Response Time | Approx. 10 ms |
| Backplane Current Draw | 85 mA at 5 V DC |
| Surge Protection | Integrated Relay Protection Design |
| Wiring Connection | Removable Terminal Block |
| Mounting Type | SLC 500 Chassis Installation |
| Operating Temperature | 0°C to +60°C |
Industrial Applications
The 1746-OW8 module is widely used in industrial systems requiring flexible relay-based load control.
Typical applications include:
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Motor starter control circuits
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Industrial conveyor systems
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Packaging and labeling machinery
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HVAC automation systems
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Water and wastewater treatment facilities
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Process control equipment
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Machine safety interface circuits
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Building management systems
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Material handling equipment
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General-purpose industrial automation panels
Its relay outputs allow direct switching of various AC and DC field devices without requiring additional interface hardware in many applications.
Product Advantages
Multi-Voltage Load Compatibility
Supports both AC and DC load switching, providing greater application flexibility across industrial systems.
Reliable Relay-Based Switching
Mechanical relay outputs deliver dependable performance for a wide range of field devices and control circuits.
Compact 8-Point Configuration
Offers efficient output control while helping optimize control cabinet space.
Strong Electrical Isolation
Individual relay isolation helps improve system stability and protects connected control equipment.
Easy Integration with SLC 500 Systems
Designed specifically for SLC 500 platforms, allowing fast installation and straightforward system expansion.
Long Service Life
Built for demanding industrial environments with durable relay components engineered for continuous operation.
Simplified Troubleshooting
Channel status indicators help maintenance personnel quickly identify output conditions and operational status.
Technical FAQs
1. What is the primary purpose of the 1746-OW8 module?
It provides relay-based output control for industrial devices connected to SLC 500 PLC systems.
2. How many output channels are available?
The module includes 8 relay output channels.
3. Can it switch both AC and DC loads?
Yes, the relay contacts support both AC and DC voltage applications within rated specifications.
4. What is the maximum current rating per output?
Each relay output supports up to 2 A continuous current.
5. Does the module require external load power?
Yes, field devices require their own external power source.
6. What type of relay contacts are used?
The module uses normally open relay contacts.
7. Is it compatible with all SLC 500 chassis systems?
Yes, it is designed for standard Allen Bradley SLC 500 racks.
8. Does the module provide output status indication?
Yes, front-panel LEDs display channel operating status.
9. What industries commonly use this module?
Manufacturing, utilities, water treatment, packaging, infrastructure, and machine automation sectors frequently use this module.
10. What is the key benefit of the 1746-OW8?
Its relay-based design provides flexible control of mixed-voltage industrial loads while maintaining reliable PLC integration.
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