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9 Opto-isolated sensor input 1(+) Max. 50mA, 12V DC
10 Opto-isolated sensor input 1(-) Ground
11 Opto-isolated sensor input 2(+) Max. 50mA, 12V DC
12 Opto-isolated sensor input 2(-) Ground
13 RS485 A D+, non-inverting
14 External power input Min. 1.5A, 12~15V AC or DC
15 External power input Min. 1.5A, 12~15V AC or DC
16 Relay output 3 – Normal Open Max. 1A, 24V DC or 0.5A, 125V AC
17 Relay output 3 – Common Short with NC at initial state
18 Relay output 3 – Normal Close Max. 1A, 24V DC or 0.5A, 125V AC
19 Relay output 4 – Normal Open Max. 1A, 24V DC or 0.5A, 125V AC
20 Relay output 4 – Common Short with NC at initial state
21 Relay output 4 – Normal Close Max. 1A, 24V DC or 0.5A, 125V AC
22 Opto-isolated sensor input 3(+) Max. 50mA, 12V DC
23 Opto-isolated sensor input 3(-) Ground
24 Opto-isolated sensor input 4(+) Max. 50mA, 12V DC
25 Opto-isolated sensor input 4(-) Ground
26 RS485 B D-, inverting
Power source
Pair of pin 14, 15 of AC or DC input is a replacement with the power adapter in case the
range cannot meet the requirement. The voltage of the power source can be AC or DC
and should fall in the range between 12V and 15V. Polarity does not matter. The DC
output through Pin 1, 2 is fed from power adapter of Video Server or pin 14 and pin 15
if an external power source is attached. The current of external devices is limited to less
than 500mA.
The power adapter of Video Server and the external power supply are prohibited to
exist together. Only one source can feed power to Video Server. Improper usage will
result in serious damage.
RS485 interface
The PTZ control commands can be directed through pin 13 and pin 26 to control the PTZ
cameras. If the distance from the controlled device is too far to allow accurate function,
an external power source may be used to amplify the RS485 signal.
Digital I/O control
Video Server provides four pairs of digital inputs and four sets of relay switches. Pin 9 to