Speco EZVR4 User Manual page 13

Alarm Input
Alarm 1 + GND / Alarm 2 + GND / Alarm 3 + GND / Alarm 4 + GND
The Alarm Signal type depends upon the Alarm Sensor polarity defined as NO (Normal Open)
or NC (Normal Close).
Alarm Output:
Relay: NO + COM or NC + COM
Relay: NO (Normal open)
NO COM
Door closed
Alarm trigger
13
Door open
Relay: NC (Normal Close)
NC COM