Allen Bradley 1756-IF8I ControlLogix Isolated Analog Input Module

Overview

The Allen Bradley 1756-IF8I is a ControlLogix isolated analog input module designed for high-accuracy signal acquisition in industrial automation systems. It supports multiple analog input channels with electrical isolation, ensuring stable signal integrity in electrically noisy environments. The module is widely used in process control applications requiring reliable measurement and robust system integration.

Allen-Bradley provides this module as part of its ControlLogix platform for advanced PLC-based control systems.

General Information

Part Number: 1756-IF8I

Manufacturer: Allen-Bradley

Brand / Country of Origin: Allen-Bradley / USA

Series: ControlLogix

Type: Isolated Analog Input Module

Mounting: ControlLogix chassis installation

Technology: Isolated 4–20 mA analog input channels with high noise immunity and diagnostic capability

Power Specifications

Supply Voltage: 5 V DC (via ControlLogix backplane)

Power Consumption: ≤ 4.5 W

Input: Backplane powered module

Protection: Overvoltage protection, channel isolation, short-circuit protection

Indicators: LED status indicators for module health, channel activity, and fault conditions

Communication & Interface

Protocol Support: 4–20 mA analog input signals

Channels: 8 isolated analog input channels

Isolation: Channel-to-channel and channel-to-system electrical isolation for improved signal stability

Diagnostics: Real-time channel diagnostics, open-wire detection, fault reporting

Interface: ControlLogix backplane communication with configuration via Studio 5000

Reset Features: Software reset and chassis-based reset support

Environmental

Operating Temperature: −20 to +70 °C

Storage Temperature: −40 to +85 °C

Humidity: 5–95% RH, non-condensing

Vibration Resistance: Industrial-grade resistance for harsh environments

Protection Rating: IP20

Dimensions & Weight

Dimensions (L × W × H): 144.57 × 22 × 105.42 mm

Weight: 0.45 kg

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