17
Connect the alarm input/output terminals with
external devices such as a sensor, buzzer, etc.
Plug/Unplug the cable by pressing the button as
shown in the diagram below.

Caution:

●Noises from an external source may cause
malfunctions even when the cable used in
shorter than 50 m. In this case, use a
shielded cable or move the cable away from
the noise source.

Alarm Input Terminal

Connect this terminal to sensor devices, such as an
infrared sensor, door sensor, metal sensor, manual
switch, etc.

䡵Input requirements

●No-voltage relay NPN open collector input
●Polarity of input detection can be selected
using a software
●Make/Break (500 ms and above)
●Circuit current at low level: 0.3 mA
●Applied voltage at high level: 3.3 V

Alarm Output Terminal

Connect this terminal to annunciating devices, such
as annunciators, indicators, lights, buzzers, etc.

䡵Output requirements

●Equivalent to NPN open collector output (Set
the output put logic via the Internet Explorer)
●Allowable applied voltage: DC12 V and below
●Allowable inflow current: 50 mA
●Momentary (100 ms to 5000 ms) output
(Set time via the Internet Explorer) (
A
Page 38)

Caution:

●Connect the G terminal of this camera to the
GND terminal of the annunciating device.
Alarm Input/Output Terminal Connection
Cable to use
●Length of 50 m or shorter
●UL1007, UL1015 or equivalent products
●AWG#22 - AWG#18 or equivalent products
CLASS2ONLY For USA
ISOLATEDPOWERONLY
ForEUROPEand OTHER
POWER
CAUTION:Donot use
PoEandAC24V together
VIDEOOUT
10BASE
-
T
/
100BASE
-
TX
G
21
2121
ALARM
OUTPUT
PoE
INPUT
AC24V
PUSH
DONOT CONNECT TO THE
TELEPHONENETWORK
ForUSA
Push
OUT
R
DC3.3V
GND
0.3mA
R
VCC
OUT
GND
3.3V
(Alarm Input Equivalent
Circuit)
Grounding
Termi n a l
INPUT
Termi na l 1
or 2
VN-C20 Sensor
Connection
Example (1)
Sensor
Connection
Example (2)
Relay, switch,
etc.
IN R
DC12 V
GND
Alarm Device
Connection
Example
OUTPUT
Termi na l 1
or 2
VN-C20
(Alarm Output
Equivalent Circuit)
Grounding
Termi n a l
VN-C20_EN.book Page 17 Tuesday, February 14, 2006 10:51 AM