The Allen Bradley 1771-IFE is a PLC-5 series analog input module designed for the 1771 I/O chassis platform. It is used to convert analog process signals such as voltage and current into digital values that can be processed by the PLC-5 controller.
This module is widely used in industrial process control systems where accurate measurement of variables like pressure, temperature, flow, and level is required.
Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | Allen Bradley (Rockwell Automation) |
| Catalog Number | 1771-IFE |
| Module Type | Analog Input Module |
| System Family | PLC-5 / 1771 I/O |
| Input Channels | 16 single-ended / 8 differential |
| Input Signal Types | Voltage & Current |
| Voltage Range | -10 to +10 VDC (also 0–5V / 1–5V options) |
| Current Range | 0–20 mA / 4–20 mA / ±20 mA |
| Resolution | 12-bit (plus sign on bipolar ranges) |
| Accuracy | ±0.1% of full scale @ 25°C |
| Update Time | 18 ms (8 channels) / 36 ms (16 channels) |
| Backplane Current Draw | ~750 mA @ 5 V DC |
| Data Format | Natural binary / BCD scaling |
| Isolation | Channel-to-channel and field isolation |
| Wiring Arm | 1771-WG |
| Mounting Type | 1771 chassis slot (1-slot width) |
| 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 (ref) |
System Role Overview
The 1771-IFE module is responsible for acquiring continuous analog signals from field instrumentation and converting them into PLC-readable data.
Core functions include:
- Analog signal conversion (A/D conversion)
- Process variable monitoring
- Integration with PLC-5 block transfer instructions
- Support for voltage and current loop devices
- High-accuracy industrial measurement
It is a core component in PLC-5 process automation systems.
Recommended Related Modules
| Model | Function |
|---|---|
| 1771-IBD | DC digital input module |
| 1771-IBN | High-density DC input module |
| 1771-IAD | AC digital input module |
| 1771-OBD | Digital output module |
| 1771-OWNA | Relay output module |
| 1771-ASB | Remote I/O adapter |
Common PLC-5 System Modules
| Model | Role |
|---|---|
| 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-ALX | Local I/O adapter |
