Product Description
Allen-Bradley 1771-IFE Analog Input Module
The Allen-Bradley 1771-IFE is an analog input module designed for the 1771 I/O rack. It provides high-accuracy voltage and current input readings, making it ideal for industrial automation and process control applications.
Key Specifications
General Information
-
Inputs per module:
- 16 single-ended
- 8 differential low-level
- Module Location: 1771 I/O rack (1-slot module)
Input Ranges
-
Voltage (nominal):
- +1 to +5V DC
- 0 to +5V DC
- -5 to +5V DC
- -10 to +10V DC
- 0 to +10V DC
-
Current (nominal):
- +4 to +20mA
- 0 to +20mA
- -20 to +20mA
Performance
- Resolution: 12-bit binary (12 bits + sign for bipolar ranges)
- Accuracy: 0.1% of full-scale range @ 25°C
- Linearity: ±1 LSB
- Repeatability: ±1 LSB
- Common Mode Rejection: 80 dB (DC - 120 Hz)
- Common Mode Voltage: +14.25V
Protection & Isolation
-
Input Overvoltage Protection:
- 200V (voltage mode)
- 8V (current mode)
- Input Overcurrent Protection: 30mA
- Isolation Voltage: Meets UL Standard 508 and CSA Standard C22.2 No. 142
Power Requirements
- Current Draw: 500mA @ +5V from I/O chassis backplane
- Power Dissipation: 2.5W max
- Thermal Dissipation: 8.52 BTU/hr max
Data Output to Processor
-
Unscaled BCD/Binary Output:
- 0000 to +4095 for polar ranges (0-5V, +1 to +5V, 0-20mA, +4 to +20mA)
- -4095 to +4095 for bipolar ranges (-5V to +5V, -10V to +10V, -20mA to +20mA)
- Engineering Units (Selectable Scaling): +9999 to -9999
Internal Scan Rate
- 8 differential inputs: 13.7ms (without filtering)
- 16 single-ended inputs: 27.4ms (without filtering)
- Additional filtering time: 0.3ms
Environmental Specifications
- Operating Temperature: 0°C to 60°C (32°F to 140°F)
- Storage Temperature: -40°C to 85°C (-40°F to 185°F)
- Relative Humidity (Operating): 5% to 95% (non-condensing)
- Relative Humidity (Storage): 5% to 85% (non-condensing)
Installation & Wiring
- Conductor Size: 14 AWG (2mm²) stranded max
- Insulation Thickness: 3/64 inch (1.2mm) max
- Field Wiring Arm: 1771-WG
- Field Wiring Screw Torque: 7-9 in-lbs
- Keying Positions: Between 10 & 12, and 24 & 26