The Allen Bradley 1771-OAD is a PLC-5 series AC digital output module designed for the 1771 I/O platform. It is used to control AC-powered field devices such as relays, solenoids, motor starters, pilot lights, and industrial actuators from PLC-5 controllers.
Engineered for dependable switching performance in industrial environments, the 1771-OAD is widely deployed in manufacturing, process automation, and heavy-duty machine control systems.
Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | Allen Bradley (Rockwell Automation) |
| Catalog Number | 1771-OAD |
| Module Type | AC Digital Output Module |
| System Family | PLC-5 / 1771 I/O |
| Output Channels | 16 outputs |
| Output Voltage | 120V AC nominal |
| Voltage Range | 74–138V AC |
| Output Type | Triac AC output |
| Continuous Current per Output | 0.5 A |
| Max Current per Module | 8 A |
| Surge Current | 5 A for 43 ms |
| Leakage Current | <8 mA per output |
| Isolation | Optical isolation between backplane and outputs |
| Backplane Current Draw | ~225 mA @ 5 V DC |
| Wiring Arm | 1771-WH |
| Mounting Type | 1771 chassis slot |
| Operating Temperature | 0°C to 60°C |
| Storage Temperature | -40°C to 85°C |
| Weight | ~0.45 kg |
| Dimensions (L×W×H) | 203 mm × 76 mm × 127 mm |
System Role Overview
The 1771-OAD module is designed for industrial AC load switching within PLC-5 control systems. It receives output commands from the PLC processor and activates connected AC field devices accordingly.
Core functions include:
- AC load switching control
- Industrial actuator operation
- Pilot light and relay control
- Integration with PLC-5 automation systems
- Reliable discrete output management
Its rugged industrial design ensures stable operation in demanding automation environments.
Recommended Related Modules
| Model | Function |
|---|---|
| 1771-IBD | DC digital input module |
| 1771-IAD | AC digital input module |
| 1771-OWNA | Relay output module |
| 1771-OBD | DC digital output module |
| 1771-IFE | Analog input module |
| 1771-ASB | Remote I/O adapter |
Popular Allen Bradley PLC-5 Modules
| Model | Function |
|---|---|
| 1785-L40B | PLC-5 processor |
| 1771-A4B | 16-slot I/O chassis |
| 1771-DMC | Communication module |
| 1771-SN | I/O scanner module |
| 1771-ALX | Local I/O adapter module |
