User's Manual
15
11
Alarm Input
16 groups (1–16) alarm input ports. They are
corresponding to ALARM 1–ALARM 16. The alarm
becomes valid in low level.
●
A and B: Control the A/B cable of the RS–485
device. It is used to connect to the PTZ
camera. Please connect 120Ω between A/B
cables if there are too many PTZ decoders.
●
: GND end.
Alarm Output
8 groups of alarm output ports (NO1 C1–NO8 C8).
They output alarm signal to the alarm device.
Please make sure there is power to the external
alarm device.
●
NO: Alarm output port of Normally Open
type.
●
C: Common alarm output port.
●
: GND end.
2.3.3 Dimensions
Figure 2-21 Dimensions with LCD (mm [inch])