Wattcher Monitor/Alarm Model 3170B
28
Dry Contact Closure
Closure will be from terminal 10 to case ground, terminal 7, in any convenient form, e.g. by an extra set of manual
contacts on the transmitter keying relay or a separate remote switch.
Figure
12
Dry Contact Closure
Logic “1” Closure
Closure circuit shown is a simplified means of interfacing a logic “1” as required from TTL driving positive signal,
indicating transmitter is on.
Figure
13
Logic “1” Closure
