When you remove the back cover of the SK618, SK633, SK634, SK642, and SK662, what are the terminals for?

Our telephone dialers each include a set of expansion terminals:

Terminal type / Dialer model

Count

Specification

Input (trigger) terminals for adding wired NC contacts (like our SK619)

 SK618
SK662
2
3
Output terminal for an external wired siren of 9V to 12V (like our SK613)
SK618
SK662
1
1
DC power output terminal

SK618
SK662
1
1
9V
12V
Ground terminal

SK618
SK662
1
1


Instructions for using the terminals are below: