User Manual
- 4 - 
I/O Wiring Diagrams 
Contact Type 
Power Source Requirement 
Dry Contact 
A 
dry Contact
 does not need to be connected to a 
power source to function properly.* 
Wet Contact 
A wet Contact must be connected to a power source 
to function properly. 
*Some users connect dry contacts to a power source for added stability. 
Depending on your application, you can decide whether or not to connect 
your dry contacts to power sources. 






