Installation guide

3
I/O Terminal Block Circuit
The alarm input/output interface of the NVR is shown below.
Connect the alarm inputs
Configure the alarm inputs as N/O or N/C in the NVR UI system. Each (alarm) input line can
be switched by a contact from external devices. Wire them as either Normally Open or
Normally Closed.
Specifications
Alarm input impedance: Internal pull-up 10 K to +5 V
Input voltage range: 0 VDC minimum to 12 VDC maximum
Input voltage threshold: low voltage 0.5 V maximum, high voltage 2 V minimum
Connect the alarm outputs
Configure the alarm outputs as N/O or N/C in the NVR UI system. The 2 alarm output relays
are responding to input alarms and triggers. Do not exceed 24 Vdc, 500 mA (continuous), or
10 VA on an alarm output relay's contacts.
Specifications
Switching current (resistive): 500 mA maximum
Switching voltage (resistive): 24 VDC maximum
Cable cross section: AWG 26-16 (0.13-1.5 mm2)