User Manual
Grandstream Networks, Inc. GXV3500 User Manual Page 28 of 82
Firmware Version 1.0.1.94 Last Updated: 05/2016
Figure 7-2: Alarm_In and Alarm_Out Connection Circuit Sample for GXV3500
NOTE:
ï The Alarm_In and Alarm_Out circuit connection has to be similar to above circuit diagram and
meet following requirement:
Alarm Input
Vin<15V, PINs (1.02KâĤ)
Alarm Output
125VAC/0.5A, 30VDC/2A, Normal Open, PINs
ï The Alarm_In circuit (like above photo coupler), if there is any voltage change smaller than 15V,
as specification listed), the GXV3500 Alarm_In port will detect it and trigger the action and event.
ï Higher voltage and wrong polarity connection are prohibited because this will damage the
devices.