The Allen-Bradley 1756SC-IF8H, also cataloged as the 1756SC-IF8H Analog Input Module, operates as a dedicated hardware component for 8-channel analog signal acquisition and HART protocol pass-through processing within ControlLogix rack assemblies.
Hardware Specifications
Parameter
Specification
Model
1756SC-IF8H
Brand
Allen-Bradley
Origin
USA / Global Manufacturing standard
Weight
0.49 lbs (0.22 kg)
Dimensions
Single-slot ControlLogix chassis module form factor
The 1756SC-IF8H processes 8 analog input signals while maintaining concurrent HART digital data transmission across ControlLogix EtherNet/IP deterministic networks. By routing dynamic HART field device variables into controller memory without interrupting primary analog conversion cycles, the module supports continuous digital instrument diagnostics. The internal bus interface executes high-frequency conversion routines while maintaining backplane bus communication velocity across adjacent chassis slots.
Frequently Asked Questions
Q: Does the 1756SC-IF8H support online insertion and removal (RIOU/hot-swapping) in ControlLogix chassis?
A: Yes. The module supports Removal and Insertion Under Power (RIUP) in ControlLogix backplanes, allowing replacement without interrupting chassis power or adjacent module operation.
Q: Can HART diagnostic data be read simultaneously with primary 4-20 mA analog input signals?
A: Yes. The 1756SC-IF8H captures 4-20 mA analog signals while extracting digital HART FSK data streams concurrently across all 8 channels.
Field Installation Guidelines
Verify backplane keying positions on the ControlLogix chassis slot before inserting the module.
Align the top and bottom circuit board guides of the 1756SC-IF8H with the chassis slot rails.
Slide the module into the slot until the top and bottom retaining latches click securely into place.
Connect field wiring to the compatible removable terminal block (RTB), ensuring proper shield grounding at the enclosure earth lug.
Download updated module profile and configuration tags to the ControlLogix controller using Studio 5000 / RSLogix 5000 environment.
