GeoVision GV-AS2120 IP Control Panel - Manual (Page 190)

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9.1.4.D Connecting Input Devices
GV-ASBox provides 8 inputs (DI1 to DI8). All inputs are
dry contact
and can be configured
as normally open (NO) or normally closed (NC) through the Web interface. The default value
is
NO
.
The figure below shows the pin assignments of input connectors on GV-ASBox. The 8 inputs
are divided into two terminals. Terminal A consists of DI1 to DI4, and terminal B includes DI5
to DI8. Every terminal has two COM (Common) points; connect the Common wire to any of
the two COM points on the related terminal.
Com.A Com.A DI4 DI3 DI2 DI1 Com.B Com.B DI8 DI7 DI6 DI5
Figure 9-4