Overview
The Allen-Bradley 1771-IFE is an industrial-grade analog input module designed for the PLC-5 series and compatible 1771 chassis environments. It senses up to 16 single-ended or 8 differential analog inputs and converts them to a proportional 12-bit binary value. The module is designed to handle both voltage and current signals with high accuracy. This is an ideal solution for retrofit and legacy system upgrades requiring reliable analog signal acquisition without external power supply requirements.
Key Features
- 12-bit resolution with up to 16 single-ended or 8 differential analog inputs
- Selectable voltage and current ranges on a per-channel basis
- Single-slot module requiring no external power supply
- Input impedance >1 MΩ (voltage), 250 Ω (current) with ~3.2 ms per channel update time
- Front-panel RUN and FAULT indicators with automatic self-check at power-up
- Input data converted to digital format for transfer to processor data table on request
Technical Specifications
- Analog Input Channels: 8 differential or 16 single-ended channels
- Resolution: 12 bits
- Input Types: Voltage (0–5V DC differential, ±10V DC single-ended/differential); Current (4–20 mA differential)
- Input Impedance: >1 MΩ (voltage), 250 Ω (current)
- Update Time: ~3.2 ms per channel
- Backplane Current: 350 mA max
- Operating Temperature: 0°C to 60°C
- Certifications: UL, CE, CSA
- Configuration: Single-ended or differential input type and voltage/current selection configured by jumpers; input range determined in software
Typical Applications
- Process control: temperature, pressure, and flow measurement
- Industrial automation and legacy system upgrades
- OEM machinery with analog sensor interfaces
- Plant-floor data acquisition and monitoring
- Retrofit solutions for PLC-5 platforms
Compatibility & Replacements
Compatible With
- Allen-Bradley Universal I/O Chassis models 1771-A1B, 1771-A2B, 1771-A3B, 1771-A4B
- PLC-5 processors and controllers
- Standard wiring arm with screw terminal connections for signal connection
Replaces / Drop-In Replacement For
- 1771-IFE Series A, Series B, and earlier revisions
- Other 12-bit analog input modules in comparable 1771 chassis slots
Works With
- PLC-5 classic processors (SLC-500, PLC-5/80, PLC-5/250)
- 1771 remote I/O adapter modules
- Standard analog signal conditioning equipment (4–20 mA transmitters, voltage transducers)
