GE TruVision DVR 20, Руководство пользователя, Страница: 12 / 126

49BChapter 2: Installation
8 TruVision DVR 20 User Manual
Alarm inputs and outputs
Table 2: Number of inputs and outputs
4-channel TVR 20 4 external alarm inputs 1 internal alarm output
8-channel TVR 20 8 external alarm inputs 2 internal alarm outputs
16-channel TVR 20 16 external alarm inputs 4 internal alarm outputs
Alarm inputs
There is a pin connector on the rear panel to connect the alarm inputs. The number
of pins depends on the TVR 20 model. They can be wired normally open (NO) or
normally closed (NC). They are configured in section “Responding to an alarm” on
page 73.
Note: Do not attempt to wire any accessories directly to the I/O connector on the rear
panel. These connections require dry contact (voltage free) closure to activate.
Figure 2: Programmable alarm inputs
Alarm input with NO in idle state Alarm input with NO in idle state
Alarm outputs
The four alarm output relays respond to input alarms and triggers. They can be
configured as NO or NC in section “Alarm and event notification” on page 75.
Table 3: Alarm output pins
Alarm out number Pin Description
Alarm out 1 1 NO (Normally Open)
2 C (Common)
3 NC (Normally Closed)