MODEL: CDR1660 / CDR0860 / CDR0460 H.264 STAND-ALONE DVR USER MANUAL V 2.6
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6.5. ALARM (RELAY) CONNECTION
If you want, you can install alarm on your DVR system. There is one alarm power switch, which is
controlled by the DVR.
The ALARM OUTPUT is a relay contactor type and supports N.O.(Normal Open) and
C.M.(Common). The Output capacity is DC 30W, AC 62.5VA. A higher capacity can cause system
failure.
The switch is closed when a sensor is activated. Refer to the below diagram to understand the
circuitry for the alarm installation.
* Connect the alarm power lines of the sensor as shown in the below diagram.
6.6. RS485 CONNECTION
If you want, you can connect PTZ cameras or external keyboard controller(to be recommended by
the DVR maker). Connect “TA(or TX+, TRX+ etc.)” of the PTZ cameras or external keyboard
controller to “TA” port of 485 ports of the DVR and “TB(or TX-, TRX-, etc.)” of the PTZ cameras or
external keyboard controller to “TB” port of 485 ports of the DVR with cables.
No DESCRIPTION
1 TA(TX+) RS485: Transmit data
2 TB(TX-) RS485: Receive data