1756-IF8I/A

Overview

1756-IF8I/A is an Allen-Bradley ControlLogix 8-point analog input module supporting flexible voltage and current input configurations.

Input Configuration

• Analogue Inputs Configurable: Yes

• Analogue Outputs Configurable: No

• Input Channels: 8 isolated, any combination of voltage or current mode

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

• Data Format: IEEE 32-bit floating point

• Module Conversion Method: Sigma-Delta

• Module Keying: Electronic, software configurable

• Settling Time: Notch filter dependent

• Overvoltage Protection: ±30 V DC maximum

Performance

• Module Error Over Full Temperature: 0.1%

• Common Mode Noise Rejection: 120 dB @ 50/60 Hz

• Normal Mode Noise Rejection: 80 dB @ 60 Hz

• Module Input Scan Time: 1 ms minimum

• Resolution: 24-bit (1.49 µV/count for voltage, 2.99 nA/count for current)

• Calibrated Accuracy: 0.05% @ 25°C

• Open Circuit Detection: 5 s

• Real-time Channel Sampling: Yes

• Onboard Data Alarming: Yes

• Scaling to Engineering Units: Yes

Power & Isolation

• Voltage/Non-sourcing Current Mode Power: 4.6 W

• Sourcing Current Mode Power: 10.6 W

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

• Current Draw: 150–400 mA @ 24 VDC depending on mode

• Sourcing Voltage: 20–36 V DC

• Sourcing Current Max: <45 mA

• Isolation Voltage: 250 V continuous, reinforced insulation (inputs to backplane); 250 V basic insulation (input to input)

Wiring

• Connection Type: Screw-/spring clamp

• Wire Category: 2 on signal ports

• Wire Size: 0.33–2.1 mm² solid or stranded, shielded copper, rated 90°C max, insulation ≤1.2 mm

Safety

• Suitable for Safety Functions: No

---