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Preparations (Step 1 Connection and Installation)
1-1 Cable Connections (continued)
6. Connecting the Alarm I/O Terminals
Connect to the equipment with alarm input terminal using the alarm signal cable.
Cable
Flat-blade
screwdriver
7. Alarm Input Terminal
This terminal is for connecting with a sensor, infrared, door or metallic, or a manual
switch.
VN-C655
DC18V
R
Terminal 1 or 2
18V
Grounding
terminal
(Alarm input equivalent circuit)
18
4 m m
Flat-blade
screwdriver
Sensor
Connection
Example 1
VCC
R
OUT
0.6mA
GND
Sensor
Connection
Example 2
Relay, switch etc.
OUT
GND
• The connector can be released by loosening the
screws on the two sides as shown in the figure.
• Strip the coating of each cable by about 4mm
before inserting it. After connecting all of the
cables, turn the screws on the side to fasten the
connectors.
Cable Specifications
50 m max.
UL1007, UL1015 or equivalent
AWG #22 to AWG #18 or equivalent
Caution
Due to external noise, the camera may not
work properly even if the length of the cable
is less than 50 m. If this occurs, use a
shielded cable or keep the cable away from
the noise source.
Input Requirements
• No-voltage relay input or NPN open collector
input
• The polarity of the input detection can be
selected via software.
• Latch/Momentary (at least 500 ms)
• Circuit current at low level: 0.6 mA
• Voltage applied at high level: 18 V
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