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Honeywell documentation lists FS-IOBUS-HBR as the horizontal bus assembly for the redundant IOCHAS-0001R chassis.
Product overview:
FS-IOBUS-HBR carries the two redundant Safety Manager I/O bus paths across the paired module positions in IOCHAS-0001R.
Each extender connection belongs to a defined processor path, so the two 10-pin cables must remain correctly separated and labeled.
Verified resources for FS-IOBUS-HBR:
Verified specifications for FS-IOBUS-HBR:
Typical applications:
HBR is selected specifically for the R chassis where two IO-0001 modules carry separate controller communication paths.
Safety and compliance:
Mark both redundant cables before removal and verify processor-path separation during post-maintenance checks.
Performance and efficiency:
The horizontal layout connects a full redundant I/O set while minimizing point-to-point cable routing inside the chassis.
FS-IOBUS-HBR is a non-conformal-coated redundant horizontal i/o bus backplane for the Honeywell Safety Manager platform. FS-IOBUS-HBR provides eighteen flat-cable connectors for the paired I/O positions and two additional connectors for IO-0001 modules in slots 20 and 21.
Two 10-pin flat-cable assemblies connect the redundant horizontal backplane to the respective extender modules. Confirm the R chassis, odd/even path allocation, cable labels and connector orientation before replacement.





