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Honeywell hardware documentation continues to identify FS-IO-0001 as the non-conformal-coated I/O extender for Safety Manager chassis.
Product overview:
FS-IO-0001 relays the control processor communication path to the chassis I/O modules through the matching horizontal bus assembly.
The module can be physically replaced with power applied, but a safety-related I/O extender change may cause the Safety Manager to shut down.
Verified resources for FS-IO-0001:
Verified specifications for FS-IO-0001:
Typical applications:
The module is a chassis communication component and must be matched to the horizontal bus and backplane arrangement.
Safety and compliance:
Follow the approved maintenance procedure and assess the impact on safety-related channels before removing the extender.
Performance and efficiency:
The module transfers chassis communication with low current demand and a standardized Safety Manager mechanical format.
FS-IO-0001 is a non-conformal-coated i/o extender module for the Honeywell Safety Manager platform. The non-conformal-coated extender module connects the control processor I/O bus to the horizontal bus and backplane inside a Safety Manager I/O chassis.
One FS-IO-0001 is used in slot 21 of a non-redundant chassis, while redundant chassis use two modules in slots 20 and 21. Confirm the chassis type, slot, flat-cable arrangement, connector coding and safety shutdown implications before powered replacement.





