JVC LWT0254-001B-H - Manual (Page 17)

EN
17 Connections & Installation (continued)
Connection of Alarm Input / Output Terminals
Connect the alarm input/output terminals to external
devices such as sensors and buzzers.
A Follow the diagram below to loosen and remove the screws
on the two edges of the terminal block.
B Strip the coating of the alarm signal cable by about 4 mm
before inserting it into the terminal.
C Turn the screw on the side to fasten the alarm signal cable.
D Upon fastening the alarm signal cable, re-install the
terminal block that has been dismantled in
A .
8 Alarm Input Terminal
Connect this terminal to an infrared, door or metallic
sensor, or to a manual switch.
●Input non-voltage contact signal to the alarm input
terminal to prevent internal circuit noises.
●Do not supply voltage.
●Use the menu to set whether to activate alarm when the
contact is short (make) or open (break).
●Ensure that the alarm signal input lasts for at least 200
ms. Otherwise, they may not be recognized as alarm
signals.
8 Alarm Output Terminal
Connect this to alarm devices such as an annunciator,
indicator, lamp or buzzer.
●The alarm output terminal is a photocoupler-insulated
open collector, which turns ON during an alarm.
●As these terminals are provided with polarity. Ensure that
voltage at the + terminal is higher than that at the -
terminal. Application of reverse voltage in this case may
cause the device to break down.
Connection of Coaxial Cables
Connecting an RG-59 coaxial cable.
Strip the tip of the coaxial cable according to the diagram
below.
MEMO
● If an RG-11 coaxial cable is used it cannot be connected directly to
the terminal board. To use such a cable, connect an RG-59 cable to
the camera and then connect the RG-11 cable to the RG-59 cable.
● To increase cable extension, make use of thicker cables or a cable
compensator.
● The maximum extension distance varies according to the system in
use as well as characteristics of the cable.
Rating
Maximum applied voltage : 20 V DC
Maximum drive current : 25 mA
4 mm
A
C
B
Alarm Signal
Cable
A
D
IN
GND
OUT +
OUT −
22 Ω
7mm 17mm
Mesh Wires
Insulation
Tape
Polyethylene
Core Wire
*
*Fold back the mesh wires and secure using an insulation tape to
prevent them from becoming loose and causing a short circuit.