1756-IF8H | AB Allen Bradley | Analog Differential Input Module - HART

Product Summary

The 1756-IF8H is a ControlLogix 8-channel isolated analog input module with HART communication. It supports voltage, current, and HART-enabled field devices for process control applications requiring analog input and digital HART data integration.

Core Specifications

• Catalog Number: 1756-IF8H
• Module Type: 8-Channel Isolated Analog Input Module with HART
• Compatible Platform: ControlLogix (1756 chassis)
• Input Channels: 8 (individually isolated)
• Input Ranges: -10 to +10 V, 0 to 5 V, 0 to 10 V, 0 to 20 mA, 4 to 20 mA
• HART Support: HART 5, 6, and 7 pass-through and device integration

Electrical Characteristics

• Resolution: 16 bits (plus sign bit)
• Isolation: 250 V continuous / 1500 V for 1 minute (channel-to-channel and field-to-backplane)
• Diagnostics: Over-range, under-range, open-circuit, and HART communication status
• Backplane Current: ~200 mA @ 5 VDC, ~2 mA @ 24 VDC (typical)

Installation Guide

1. Install the module in any slot of a 1756 ControlLogix chassis.
2. Use a removable terminal block (RTB) for field wiring (1756-TBCH or 1756-TBS6H recommended).
3. Configure the module in Studio 5000 Logix Designer, selecting input ranges and enabling HART pass-through.
4. Perform HART device integration and verification through the programming software.

Selection Guidelines

• Select 1756-IF8H for applications requiring isolated analog inputs with HART protocol support for intelligent field devices.
• For non-HART versions, consider 1756-IF8 or 1756-IF16.
• Ensure chassis power supply capacity supports the module’s backplane current draw.

Frequently Asked Questions