Allen-Bradley 1756-IF8I | ControlLogix High-Precision Analog Input Module

Product Content Example

The 1756-IF8I is an Allen-Bradley ControlLogix analog input module designed for high-accuracy industrial applications. It provides eight individually isolated channels that support voltage and current inputs. The module handles ±10.5V, 0–10.5V, 0–5V, and 0–20 mA signals.

High-Resolution Conversion and Data Format

Each channel of 1756-IF8I uses 24-bit sigma-delta conversion. It outputs IEEE 32-bit floating-point data and delivers an effective resolution between 16–21 bits. The module accurately converts signals as low as 1.49 μV/count for voltage and 2.99 nA/count for current.

Power and Backplane Specifications

The module draws 200 mA at 5.1 VDC and 150 mA or 400 mA at 24 VDC depending on sourcing mode. Maximum power dissipation ranges from 4.6 W in voltage mode to 7.3 W in sourcing current mode. It provides loop power for 2-wire and 4-wire transmitters.

Channel Protection and Diagnostic Features

1756-IF8I protects each channel against overvoltage and short circuits. It monitors module temperature errors, ramp rates, and process alarms while providing advanced diagnostics for reliable operation.

Installation and Connectivity

The module uses removable terminal blocks 1756-TBNH and 1756-TBS6H. It fits standard ControlLogix backplane slots and ensures seamless integration into industrial automation systems.