1756-IF8I

Overview

• Model: 1756-IF8I

• Brand: Allen-Bradley

• Type: ControlLogix 8-Point Analog Input Module

• Function: Provides 8 isolated analog input channels for voltage and current signals

Electrical Characteristics

• Input Range: -10...10V, 0...10V, 0...5V, 0...20 mA

• Resolution: 24-bit, ±10.5V (1.49 µV/count), 0–21 mA (2.99 nA/count)

• Conversion Method: Sigma-Delta

• Data Format: IEEE 32-bit floating point

• Accuracy: 0.05% @ 25°C, 0.1% full temperature range

• Noise Rejection: 120 dB (common mode, 50/60 Hz), 80 dB (normal mode, 60 Hz)

• Scan Time: 1 ms minimum

• Open Circuit Detection: 5 s

Power & Consumption

• Backplane Current: 200 mA @ 5.1V DC

• 24V Current Draw: 150 mA (non-sourcing), 400 mA (sourcing)

• Power Dissipation: 4.6 W (voltage mode), 5.1 W (non-sourcing), 7.3 W (sourcing)

• Thermal Dissipation: 15.7–24.9 BTU/hr depending on mode

• Sourcing Voltage: 20–36 V DC (open circuit)

Module Design

• Channels: 8 isolated, configurable for voltage or current

• Input Protection: ±30V DC overvoltage protection

• Module Keying: Electronic, software configurable

• Bandwidth & Settling: Dependent on notch filter configuration

Physical & Wiring

• Connection Type: Screw or spring clamp

• Wire Size: 0.33–2.1 mm² (22–14 AWG), shielded copper, 90°C rating

• Wire Category: Category 2 (signal ports)

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