Honeywell FC-SDI-1624 Safe digital input module

Honeywell FC-SDI-1624 Safe digital input module

Description

The safe digital input module SDI-1624 has sixteen 24 V DC digital input channels. The input stage of the module is of a ‘fail-to-safe’ nature. This means that a component failure results in a de-energized input signal to the processor, which is the safe condition in a normally energized system.

The remaining logic circuitry on the module is completely covered by the self-test functions of the system. Within the configured Diagnostic Test Interval, the modules are tested for:

• Ability to receive logic level ‘0’ signals
• Ability to receive logic level ‘1’ signals
• Crosstalk between inputs

The 24 V DC out pin is a current limited output, intended for energizing the (redundant) inputs via a field contact.

 Technical Specifications