JVC DOME TYPE CAMERA TK-C676 Instructions Manual page 15

Coaxial cable
Connecting a RG-59 coaxial cable.
If a RG-11 coaxial cable is used it cannot be con-
nected directly to the terminal board. To use such a
cable, connect a RG-59 cable to the camera and then
connect the RG-11 cable to the RG-59 cable.
Treat the extremity of the coaxial cable as shown below
before connecting it.
Fold back the mesh wires and secure them with insulation tape in order
to prevent them from becoming loose and thus causing a short circuit.
Polyethylene Mesh wires
Conductor
wire
7
(5)
Insulation tape
The figures inside the brackets (
when the coaxial cable is distributed from the side of the cover.
(Unit : mm)
If the cable is extended, the signal attenuation is increased,
the resolution drops and the noise increases. Should it be
required to extend the cable, use a thicker cable or a ca-
ble length compensator.
To lead the coaxial cable through the cap on the side of
the cover, change the positioning of the cable plate as
shown below.
Provided cable
plate
Control signal cables
RM-P2580 units allow the connection of up to eight cam-
eras to a single set of control signal cables. The overall
maximum permissible length of these control signal cables
is 1200 meters.
Cable
Flat-blade
4 m m
screwdriver
The connector can be released by
loosening the screws on the two sides as
shown in the figure.
Flat-blade screwdriver
Strip the coating of each cable by about 4
mm before inserting it. After connecting all
of the cables, turn the screws on the side
to fasten the connectors.
It is recommended to use a 4-core (a pair)
twisted pair cable (0.65) or a twisted pair
cable of category 3 or higher which is
used for a Ethernet.
Cables with a thickness between 16 AWG and 26 AWG can be used.
Connect the control signal cables so that the TX+ and TX- signals
form a pair and the RX+ and RX- signals form another pair.
17
(12)
) are the dimensions
Provided screw
Screw removed in the
figure on the left
Alarm signal cables
Alarm output terminals (CN24)
Connect the provided 4P Alarm cable
to these terminals.
Alarm input terminals (CN26)
Connect the provided 6P Alarm cable
to these terminals.
Electrical Specification of the Alarm Output Terminals
• The ALARM 1 terminal outputs a
N. OPEN
contact signal. In the alarm status,
the section between N.OPEN and
COM.
COM is shorted (makes an electri-
cal contact) and the section be-
tween N.CLOSE and COM is
N. CLOSE
opened (breaks contact).
Rating
Maximum applied voltage: 30 V
DC or 24 V AC
Maximum applied current: 2 A
Contact life: 200,000 times of
• The ALARM 2 and ALARM 3 ter-
ALARM2+
minals output open-collector sig-
or
nals insulated by photocouplers.
ALARM3+
The terminal is ON in the alarm sta-
22 Ω
tus.
As these terminals are provided
with polarity, make sure that the
voltage at the + terminal is higher
than that at the – terminal.
ALARM2–
or Do not apply inverse voltage to pre-
ALARM3–
vent damage of these terminals.
Rating
Maximum applied voltage: 20 V DC
Maximum drive current: 25 mA
Electrical Specifications of Alarm Input Terminals
ALARM1
• To prevent penetration of noise in
GND
the internal circuitry, apply a non-
voltage contact signal to the
ALARM input terminal
Never apply a voltage.
• Use the appropriate menu to select whether the alarm is
identified by shorting (making contact) or by opening (break-
ing contact).
• Apply an alarm signal for at least 200 ms. If it is shorter, it is
not guaranteed that the signal will be recognized as an alarm
signal.
5.
Attach the cover.
Attach the cover to the ceiling mount by reversing the
2
operations in step .
P. 6
Alarm input/output terminals
(CN23)
operation
E-15