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- Allen Bradley
- 1769-OW8
- CompactLogix I/O Module
- USA
- 118 mm × 35 mm × 87 mm
- 0.28kg
- Xiamen, China
- New & In Stock
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Technical Report: Relay Output Module 1769-OW8
1. Product Overview
The 1769-OW8 is a compact industrial relay output module designed for PLC-based automation systems requiring flexible switching of AC and DC loads.
It provides 8 normally open relay output channels, arranged in grouped outputs, enabling control of a wide range of field devices such as contactors, solenoids, alarms, and small motors.
This module is widely used in industrial environments where electrical isolation, voltage flexibility, and rugged switching capability are required.
2. Brand Information
- Brand: Industrial Automation Control Brand
- Product Category: PLC Relay Output Module
- Technology Field: Industrial Automation / Discrete Control Systems
- Manufacturing Origin: United States (varies by production batch)
3. Product Series
- Series Name: Compact I/O Series
- System Architecture: Modular PLC expansion platform
- Compatibility: Compact PLC controllers and distributed I/O systems
- Installation Type: DIN rail backplane mounting system
The Compact I/O series is designed for scalable I/O expansion in PLC architectures without changing the core controller hardware.
4. Product Introduction
The 1769-OW8 uses mechanical relay contacts to switch electrical loads. Unlike solid-state outputs, it provides physical isolation through electromechanical switching.
Each channel operates as a normally open contact, capable of switching both AC and DC loads within industrial voltage ranges.
This makes it suitable for mixed-voltage systems where different load types must be controlled within the same control cabinet.
5. Technical Parameters
5.1 Electrical Performance
| Parameter | Value |
|---|---|
| Number of Channels | 8 (Normally Open relay outputs) |
| Output Type | Electromechanical relay |
| Operating Voltage Range | 5–265 V AC / 5–125 V DC |
| Current per Point | 2.5 A max |
| Current per Module | 16 A max |
| Minimum Load Current | 10 mA @ 5 V DC |
| Contact Form | SPST-NO |
| Turn-On Delay | ~10 ms |
| Turn-Off Delay | ~10 ms |
| Contact Resistance | Low initial resistance (mechanical contact) |
| Switching Method | Dry contact relay switching |
5.2 Electrical Isolation & Protection
| Parameter | Value |
|---|---|
| Isolation Voltage | 1836 V AC (1 s) / 2596 V DC (1 s) |
| Working Voltage | Up to 265 V AC |
| Isolation Type | Channel-to-bus and group isolation |
| Protection Type | Reinforced industrial insulation |
| Arc Suppression | External recommended for inductive loads |
5.3 Power Consumption
| Parameter | Value |
|---|---|
| Backplane Current Draw @ 5.1V | ~125 mA |
| Backplane Current Draw @ 24V | ~100 mA |
| Heat Dissipation | ~2.83 W |
| Energy Profile | Moderate due to relay coil energizing |
5.4 Physical Dimensions & Weight
| Parameter | Value |
|---|---|
| Height | 118 mm |
| Width | 35 mm |
| Depth | 87 mm |
| Mounting Type | DIN rail / panel mount |
| Weight | 0.28 kg (approx.) |
| Slot Width | 1 module slot |
5.5 Wiring & Installation
| Parameter | Value |
|---|---|
| Wire Type | Copper conductor |
| Solid Wire Size | 22–14 AWG |
| Stranded Wire Size | 22–16 AWG |
| Terminal Type | Removable screw terminal block |
| Load Compatibility | AC and DC inductive/resistive loads |
| Recommended Protection | Snubber circuit for coils |
6. Product Applications
The 1769-OW8 is used in systems requiring flexible switching of different voltage levels and load types.
Typical application areas:
- Industrial machine automation
- Conveyor systems
- Packaging machinery
- HVAC control systems
- Pump and valve switching systems
- Alarm and signaling systems
- Motor starter control circuits
- OEM control panels
Typical controlled devices:
- Solenoid valves
- Contactors
- Relays
- Indicator lamps
- Small motors
- Buzzers and alarms
7. Product Advantages
7.1 Universal AC/DC Switching
Capable of switching both AC and DC loads across a wide voltage range.
7.2 True Electrical Isolation
Relay contacts provide complete galvanic isolation between PLC and field devices.
7.3 High Load Flexibility
Suitable for inductive, resistive, and mixed industrial loads.
7.4 Simple System Integration
Direct PLC backplane connection reduces wiring complexity.
7.5 Strong Industrial Robustness
Performs reliably in noisy electrical environments.
7.6 Easy Maintenance
Fault isolation at channel level simplifies troubleshooting and replacement.
8. Recommended Models (Same Series / Related Modules)
8.1 Same Series / Closely Related Modules
| Model | Description | Key Parameters |
|---|---|---|
| 1769-OV16 | 16-channel DC sinking output module | 24V DC solid-state switching |
| 1769-OB16 | 16-channel DC sourcing output module | Fast transistor outputs |
| 1769-OG16 | 16-channel TTL output module | 5V logic-level output |
| 1769-OF4CI | 4-channel analog current output module | 4–20 mA precision control |
| 1769-OF8C | 8-channel analog output module | High-density analog current output |
9. Recommended Models (Same Brand – Popular Modules)
| Model | Type | Key Parameters |
|---|---|---|
| 1769-L24ER | PLC Controller | Integrated CPU, Ethernet communication, modular expansion |
| 1769-L33ER | PLC Controller | High-performance processing, motion control support |
| 1769-PA4 | Power Supply Module | 24V DC system backplane power |
| 1769-IQ16 | Digital Input Module | 16-channel discrete input, fast response |
| 1769-OB32 | Digital Output Module | 32-channel transistor output, high-density control |
10. Summary
The 1769-OW8 is a reliable 8-channel relay output module designed for industrial automation systems requiring flexible AC/DC switching capability.
Its mechanical relay design provides strong isolation, wide voltage compatibility, and excellent load flexibility, making it suitable for a broad range of machine control and process automation applications.