IP DVR SERVER
USER MANUAL
42
7.
External Connection.
7.1.
External I/O Terminal.
7.1.1.
External I/O Terminal Description.
Terminal No.
Title
Description
Pin 1
RS485(-)
Pin 2
RS485(+)
RS485 communication terminal, used for PTZ controlling
device connection.
Pin 3
Alarm Input
If connected to GND(Pin5) due to alarm input, this will be
activated. If not, it will be deactivated.
Pin 4
Alarm Output
Has a built-in Open-collector NPN transistor and Emitter is
connected to GND. If user wishes to relay to external device,
user need to connect the diode in parallel.
Maximum electricity current allowed is 100mA, and
maximum allowed voltage is 24V.
Pin 5
GND
Used along with alarm input terminal (Pin3) and/or alarm
output terminal (Pin4).
Pin 6
Power I/o
User can either use DC power input directly or use IP DVR
SERVER as a power output source for other device.
System circuit of external I/O terminal.