Honeywell FC-SDI-1624 is a safe digital input module in the Safety Manager hardware family. Its role is to receive discrete field signals and present them to the safety system with the diagnostics and engineering discipline expected in safety-related applications.

The FC designation identifies the conformal-coated version. Selection should be made by exact model and released hardware revision, not by visual similarity to adjacent Safety Manager boards.

• Acquires discrete field states for use by Safety Manager application logic.
• Provides clear electrical state thresholds so input behavior can be evaluated during commissioning.
• Supports diagnostic and maintenance workflows when used with the approved Safety Manager hardware configuration.
• Uses conformal coating to support installation practices for demanding industrial control environments.

Typical duties include emergency shutdown permissives, fire and gas status collection, trip contacts, machine-protection interlocks and other discrete signals assigned to a Safety Manager system.

The final application must follow the project safety requirements, approved cabinet design, field power concept and Honeywell Safety Manager documentation.

Honeywell release documentation identifies FC-SDI-1624 hardware variants under catalog entries 3432100 V1.0 and 3432110 V1.1. Exact revision, installed system release and project certification records should be checked before replacement.

For a spare or migration order, verify the board label, coating requirement and released Safety Manager configuration. A neighboring model number is not a substitute.

Related Safety Manager families include other safe digital input voltage variants, safe digital output modules and matching field termination assemblies. Compatibility is determined by the approved Honeywell hardware manual and the installed project configuration.