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- Allen Bradley
- 1746-OW8/A
- SLC 500 Relay Output Module
- USA
- 144.5 × 34.6 × 130.18 mm
- 0.45 kg
- Xiamen, China
- New & In Stock
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Our products are imported in bulk from the place of origin. Because of the cooperative relationship, our products are all original and 100% new.
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We provide 7*24 hours service to our customers. We will be there whenever you need us.
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All our products are priced very favorably because we have our own warehouse and supply.
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Product Overview
Efficient and reliable output control is a critical part of every industrial automation system. The Allen-Bradley 1746-OW8/A SLC 500 Relay Output Module is a versatile 8-point relay output module designed for the Allen-Bradley SLC 500 PLC platform, providing dependable switching of AC and DC field devices in manufacturing, process control, and machine automation applications.
The 1746-OW8/A is installed directly into an SLC 500 chassis and communicates with the PLC processor through the system backplane. Equipped with eight relay output channels, the module converts PLC control commands into electrical switching signals that operate contactors, relays, solenoid valves, indicator lights, alarms, and other industrial devices. Because relay contacts provide electrical isolation, the module can control a variety of voltage levels while improving system safety and reliability.
With dimensions of 144.5 × 34.6 × 130.18 mm and a weight of 0.45 kg, the 1746-OW8/A offers a compact, durable, and flexible solution for expanding digital output capability in SLC 500 control systems.
Technical Specifications
| Parameter | Details |
|---|---|
| Manufacturer | Allen-Bradley |
| Model | 1746-OW8/A |
| Product Type | SLC 500 Relay Output Module |
| PLC Platform | SLC 500 |
| Output Channels | 8 Relay Outputs |
| Output Type | Normally Open Relay Contacts |
| Contact Configuration | 8 Independent Outputs |
| Output Groups | 2 Groups (4 Outputs per Common) |
| Supported Load Type | AC and DC Loads |
| Switching Technology | Electromechanical Relay |
| Isolation | Relay Isolation Between PLC and Field Circuit |
| Installation | SLC 500 Chassis |
| Mounting Method | Backplane Installation |
| Dimensions | 144.5 × 34.6 × 130.18 mm |
| Weight | 0.45 kg |
| Application | Industrial Digital Output Control |
Product Features
The 1746-OW8/A is designed to provide dependable relay switching for industrial automation equipment.
Key features include:
- Eight independent relay output channels
- Supports both AC and DC load control
- Excellent electrical isolation between PLC and field devices
- High switching reliability for industrial applications
- Compact module design for efficient cabinet installation
- Direct integration with SLC 500 PLC systems
- Stable performance during continuous operation
- Easy installation and maintenance
Its relay output architecture allows one module to control a wide variety of industrial electrical devices without requiring separate AC and DC output modules.
Working Principle
The 1746-OW8/A functions as the output interface between the SLC 500 PLC processor and field equipment.
When the PLC program activates an output channel, the module energizes the corresponding internal relay. The relay contacts then close, allowing electrical power to reach the connected field device. When the PLC output is turned off, the relay returns to its normal open position, disconnecting the load.
The module is commonly used to operate:
- Motor contactors
- Solenoid valves
- Industrial relays
- Alarm devices
- Indicator lamps
- Signal beacons
- Small AC and DC loads
Its relay-based design provides reliable switching while protecting PLC electronics from field-side electrical disturbances.
Role in Industrial Automation Systems
The 1746-OW8/A serves as the execution layer between PLC control logic and industrial equipment.
| Function | Description |
|---|---|
| Digital Output Control | Controls external electrical loads |
| Relay Switching | Operates AC and DC devices |
| Equipment Control | Drives relays, valves and contactors |
| Machine Automation | Executes PLC output commands |
| Process Control | Controls industrial process equipment |
| System Expansion | Increases relay output capacity |
Industrial Applications
The Allen-Bradley 1746-OW8/A is widely used across many industrial sectors.
| Industry | Typical Equipment |
|---|---|
| Manufacturing | Automated production equipment |
| Automotive | Assembly machines |
| Packaging | Filling, sealing and labeling systems |
| Food & Beverage | Conveyor and packaging machinery |
| Water Treatment | Pump and valve control |
| Pharmaceutical | Automated processing equipment |
| Chemical Processing | Process control systems |
| General Industry | PLC-based automation systems |
Its flexibility allows the module to support both simple machine control and complex industrial automation systems.
Installation and System Integration
Correct installation helps ensure reliable operation and extended service life.
Recommended installation procedures include:
- Install the module into an available SLC 500 chassis slot.
- Verify that sufficient backplane power is available.
- Connect field wiring according to the terminal layout.
- Confirm that connected loads are within relay ratings.
- Secure all wiring connections before energizing the system.
- Verify output operation during commissioning.
- Perform functional testing before normal production.
Proper installation minimizes downtime and improves overall system reliability.
Compatible System Components
The 1746-OW8/A is commonly integrated with other Allen-Bradley SLC 500 automation products.
| Compatible Component | Function |
|---|---|
| SLC 500 Processor | Executes automation programs |
| SLC 500 Chassis | Houses PLC modules |
| 1746-IV8 DC Input Module | Digital input acquisition |
| 1746-NT4/B Thermocouple Input Module | Temperature measurement |
| 1746-NI4 Analog Input Module | Analog signal acquisition |
| Human Machine Interface (HMI) | Operator control and monitoring |
| Industrial Power Supply | Provides system operating power |
These components work together to create a complete and scalable industrial automation system.
Recommended Alternative Models
| Model | Product Type | Key Feature | Typical Application |
|---|---|---|---|
| 1746-OW8/A | Relay Output Module | 8 relay output channels | General machine automation |
| 1746-OW16 | Relay Output Module | 16 relay outputs | Large automation systems |
| 1746-OB8 | DC Output Module | Solid-state DC outputs | Fast switching applications |
| 1746-OA16 | AC Output Module | AC output control | Industrial AC equipment |
| 1746-OV16 | DC Output Module | DC sourcing outputs | PLC digital output systems |
Key Advantages
- Eight independent relay output channels
- Controls both AC and DC field devices
- Reliable electrical isolation
- Compact industrial-grade design
- Easy integration with SLC 500 PLC systems
- Long service life with stable switching performance
- Suitable for a wide range of industrial automation applications
- Reduces system complexity while improving operational flexibility
Technical FAQs
What is the Allen-Bradley 1746-OW8/A used for?
The 1746-OW8/A is used to control industrial field devices such as contactors, relays, solenoid valves, indicator lamps, and alarm equipment within SLC 500 PLC automation systems.
How many output channels does the module provide?
The module provides 8 independent relay output channels for controlling multiple field devices simultaneously.
Can the module control both AC and DC loads?
Yes. Its relay output design allows it to switch both AC and DC electrical loads, making it suitable for various industrial applications.
Which PLC platform supports the 1746-OW8/A?
The 1746-OW8/A is specifically designed for installation in the Allen-Bradley SLC 500 programmable controller platform.
Conclusion
The Allen-Bradley 1746-OW8/A SLC 500 Relay Output Module is a dependable industrial relay output solution designed to provide reliable switching for a wide variety of automation equipment.
Featuring 8 relay output channels, electrical isolation, compact dimensions of 144.5 × 34.6 × 130.18 mm, and a lightweight 0.45 kg design, the module delivers stable performance, flexible integration, and long-term operational reliability.
Whether used in manufacturing, packaging, water treatment, food processing, pharmaceutical production, or general industrial automation, the 1746-OW8/A provides an efficient and reliable solution for expanding digital output capability while maintaining the proven performance of the Allen-Bradley SLC 500 control platform.