Allen-Bradley 1771-IFE PLC-5 Analog Input Module

Product Description

The Allen-Bradley 1771-IFE is an analog input module for the PLC-5 series, designed to handle both voltage and current signals with high accuracy. It supports up to 8 differential or 16 single-ended channels, offering flexible configuration for industrial automation systems. With 12-bit resolution, fast update times, and rack-mount compatibility, it provides reliable signal acquisition for process control applications.

Technical Specifications

• Manufacturer Allen-Bradley

• Product Line PLC-5

• Product Type Analog Input Module

• Part Number 1771-IFE

• Weight 1.00 lbs (0.45 kg)

• I/O Capacity 8 differential inputs or 16 single-ended inputs

• Resolution 12-bit binary; 12 bits plus sign on bipolar ranges

• Accuracy ±0.1% of full scale at 25 °C

• Channel Update Time 18 ms for 8 channels; 36 ms for 16 channels

• Data Format Natural binary or BCD scaling to ±9999

• Internal Scan Rate

• 12.5 ms for 8 differential inputs (no filtering)

• 25 ms for 16 single-ended inputs (no filtering)

• Additional delay with digital filtering: +2.12 ms (differential), +4.24 ms (single-ended)

• Voltage Input Range -10 to +10 VDC

• Current Input Range -20 to +20 mA

• Typical DC Signal Delay 10 ms (ON), 20 ms (OFF)

• Typical AC Signal Delay 24 ms (OFF)

• Backplane Current Draw 750 mA

• Wiring Arm 1771-WG

• Mounting Rack mountable, 1 slot width

Application Scenarios

• Process control systems requiring accurate analog signal acquisition

• Industrial automation with mixed voltage and current input signals

• Applications needing flexible channel configuration (differential or single-ended)

• Integration into PLC-5 racks for analog monitoring and control

FAQ

Q: How many channels does the 1771-IFE support?  A: It supports 8 differential or 16 single-ended channels.

Q: What is the resolution of the inputs?  A: 12-bit resolution, with sign bit included for bipolar ranges.

Q: Does the module require external power?  A: No, it operates using backplane power only.

Comparison with Similar Models

• 1771-IFM: Provides isolated analog inputs for enhanced signal separation.

• 1771-IFE: Standard analog input module with flexible channel configuration.

• 1771-IFD: Differential-only input module for specialized applications.