The Allen Bradley 1771-OFE1 is a PLC-5 series analog voltage output module designed for the 1771 I/O chassis platform. It converts digital values from the PLC processor into precise analog voltage signals for controlling industrial devices such as valves, drives, dampers, and instrumentation systems.
This module is widely used in process automation environments where stable, scalable, and isolated analog output control is required.
Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | Allen Bradley (Rockwell Automation) |
| Catalog Number | 1771-OFE1 |
| Module Type | Analog Voltage Output Module |
| System Family | PLC-5 / 1771 I/O |
| Output Channels | 4 isolated differential outputs |
| Output Signal Range | 1–5V DC / 0–10V DC / ±10V DC |
| Resolution | 12-bit digital-to-analog conversion |
| Accuracy | ±0.1% full scale (typical) |
| Load Capability | Up to ~10 mA per channel |
| Update Time | ~1.6 ms (binary mode, per scan optimized) |
| Data Format | Binary / BCD selectable |
| Backplane Current Draw | ~1.5 A @ 5 V DC |
| Power Dissipation | ~7.9 W |
| Isolation | 1000V channel-to-channel isolation |
| Configuration | Voltage range selectable via jumpers |
| Wiring Arm | 1771-WA |
| Mounting Type | 1771 chassis slot |
| Operating Temperature | 0°C to 60°C |
| Storage Temperature | -40°C to 85°C |
| Weight | ~0.5 kg |
| Dimensions (L×W×H) | 203 mm × 76 mm × 127 mm |
System Role Overview
The 1771-OFE1 module is designed for precision analog signal output control in PLC-5 systems. It transforms PLC control data into proportional voltage signals used to regulate industrial equipment.
Core functions include:
- Analog voltage output generation
- Control of modulating devices (valves, dampers, drives)
- Signal interfacing for industrial instrumentation
- Process variable control in closed-loop systems
- Integration with PLC-5 block transfer architecture
It is commonly used where smooth analog control is required instead of discrete switching.
Recommended Related Modules
| Model | Function |
|---|---|
| 1771-OFE2 | Analog current output module (4–20 mA) |
| 1771-IFE | Analog input module |
| 1771-IFF | High-resolution analog input module |
| 1771-IR | RTD temperature input module |
| 1771-IXE | Thermocouple 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 | Data Highway communication module |
| 1771-SN | I/O scanner module |
| 1771-OBD | DC output module |
