HIMA F7553 | Subrack Safety Bus Coupling Module for H41q/H51q HIQuad QMR SIS – Field Service Notes

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Component Snapshot At-a-Glance

Model: F7553
Alt. P/N: 984755302 full factory order part
Product Series: HIMA HIQuad H41q / H51q QMR Safety Instrumented System
Hardware Type: 4TE DIN rack-mounted X-Bus safety subrack coupling module
Key Feature: DIP switch rack address coding + continuous 5V subrack power supply monitoring with fault reporting to main CPU
Primary Field Use: Bridge main CPU rack X-Bus safety bus to remote distributed I/O subracks to expand DI/AI/DO channel capacity for SIL3 ESD safety loops.