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- Allen Bradley
- 1769-OW8I
- 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-OW8I
1. Product Overview
The 1769-OW8I is a compact industrial 8-channel relay output module with isolated contact design, used in PLC-based automation systems for switching both AC and DC loads.
It provides 8 independently controlled normally open relay outputs, arranged for industrial control applications requiring strong electrical isolation and flexible load compatibility.
This module is designed for applications where reliability, voltage flexibility, and galvanic isolation are critical in mixed electrical environments.
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 platform enables scalable expansion of I/O points without modifying core PLC hardware.
4. Product Introduction
The 1769-OW8I uses electromechanical relay contacts to switch field loads. Each channel operates as a normally open isolated contact, allowing complete galvanic separation between PLC logic and external power circuits.
It supports both AC and DC switching, making it suitable for mixed-voltage industrial systems.
The module is commonly used in machine control panels where safety isolation and multi-voltage compatibility are required.
5. Technical Parameters
5.1 Electrical Performance
| Parameter | Value |
|---|---|
| Number of Channels | 8 (individually isolated relay outputs) |
| Output Type | Relay (Normally Open contacts) |
| Output Voltage Range | 5–265 V AC / 5–125 V DC |
| Current per Point | 2.5 A max |
| Current per Module | 16 A max |
| Contact Configuration | SPST-NO |
| Switching Time (ON) | ~10 ms |
| Switching Time (OFF) | ~10 ms |
| Contact Resistance | Low initial contact resistance |
| Load Type | AC/DC resistive and inductive loads |
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 Structure | 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 | ~2.8 W |
| Operating Energy | Moderate due to relay coil actuation |
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.) |
| Module Width | 1 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/DC inductive and resistive loads |
| Recommended Protection | Snubber circuit for inductive loads |
6. Product Applications
The 1769-OW8I is widely used in industrial control systems requiring isolated switching of multiple loads.
Typical application areas:
- Industrial automation control panels
- Machine tool systems
- Conveyor and material handling systems
- Packaging machinery
- HVAC control systems
- Pump and valve control systems
- Alarm and safety systems
- OEM equipment control
Typical controlled devices:
- Solenoid valves
- Contactors
- Small motors
- Relay coils
- Signal lamps
- Audible alarms
7. Product Advantages
7.1 Strong Electrical Isolation
Relay contacts provide complete galvanic isolation between control system and field wiring.
7.2 Multi-Voltage Switching Capability
Supports both AC and DC loads across a wide voltage range.
7.3 Flexible Load Handling
Suitable for inductive, resistive, and mixed industrial loads.
7.4 Simple System Integration
Direct PLC backplane installation reduces wiring complexity.
7.5 Robust Industrial Design
Reliable operation in noisy electrical environments and harsh industrial conditions.
7.6 Easy Maintenance
Individual channel failure diagnosis simplifies troubleshooting and replacement.
8. Recommended Models (Same Series / Related Modules)
8.1 Same Series / Closely Related Modules
| Model | Description | Key Parameters |
|---|---|---|
| 1769-OW8 | Standard 8-channel relay output module | AC/DC switching, non-isolated variant |
| 1769-OW16 | 16-channel relay output module | High-density relay switching |
| 1769-OV16 | 16-channel DC sinking output module | Solid-state 24V DC outputs |
| 1769-OB16 | 16-channel DC sourcing output module | Fast transistor outputs |
| 1769-OG16 | 16-channel TTL output module | 5V logic-level outputs |
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 switching |
| 1769-OB32 | Digital Output Module | 32-channel transistor output, high-density control |
10. Summary
The 1769-OW8I is a robust 8-channel isolated relay output module designed for industrial automation systems requiring flexible AC/DC switching and strong electrical separation.
Its combination of galvanic isolation, multi-voltage compatibility, and durable electromechanical switching makes it suitable for a wide range of industrial control applications.