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What is the difference between form A and form C relay digital outputs in SmartX controllers?

Form A relay digital output:

Form A digital output means that, outputs are normally open contacts with one common terminal (C) and one normally open terminal (NO). The terminals are isolated from signal ground.

 

Machine generated alternative text:

Form A digital output internal configuration in DO-FA-12 and DO-FA-12-H I/O modules, for AS-P

 

Machine generated alternative text:

Form A digital output internal configuration in AS-B and MP-Cs

 

Form C relay digital output:

 

The Form C digital outputs are switching contacts with one common terminal (C), one normally open terminal (NO), and one normally closed terminal (NC). The terminals are isolated from signal ground.

 

Machine generated alternative text:Terminal base +24 v RS-485 O module NO iii- NC

Form C digital output internal configuration in DO-FC-8, DO-FC-8-H, UI-8/DO-FC-4, and UI-8/DO-FC-4-H I/O modules, for AS-P

 

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