YOKOGAWA DT450G Series, Руководство пользователя, Страница: 25 / 41

<3. Piping and Wiring>
3-4
IM 11K01C01-01E
3.3 Connection of Wires for the Output Signals
This section discusses the wiring necessary to transmit analog output signals and alarm contact
signals to each device.
Wire the analog output and alarm contact signals of the DT450G using a single cable.
Use a cable with an outside diameter of 5 to 10 mm, comprising three shielded twisted pair wires
with the nominal cross-section of the conductor being not more than 0.5 mm
2
.
If only the analog output signal is used and it is unlikely to be affected by noise (as the signal
is wired at a location distant from the power line), it is not always necessary to use twisted-pair
wires.
Insert the cable through the cable connection fitted with a Pg11 cable gland into the internal
assembly of the DT450G. Connect the core wires of the analog output signal to the mA+ (positive
side) and mA- (negative side) terminals. Also, connect the core wires of the alarm contact signal
to the c of RL1 or RL2 and nc terminals (for an open contact upon alarm output) or to the c and
no terminals (for a closed contact upon alarm output).
Ground the shielded wires of the cable on the receiver side.
CAUTION
The output signal may be mixed with electric noise if the cable swings. If the cable is likely to be
affected by wind, fin the cable.
DT450G Wiring.ai
(Not used)
AC power supply
Alarm contact signal
Receiver
Grounding
DT450G
Junction Box
接地
Power Switch
Analog Output Signal
Not used
mA-
mA+
no
c
nc
no
c
nc
Output
RL2
(Relay contact)
RL1
(Relay contact)
SHIELD
AC1
AC2
Power Supply connector
N L
（ *3 ）
（* 2 ）
(*1) The nomonal cross-sevtion of each conductor should be 1.5 mm 2
(*2) The nomonal cross-sevtion of each conductor should be not more than 0.5 mm 2
(*3) This terminal is used for the grouding on the receiver side.
Notes: The above wiring diagram shows the one when using no contacts. Connect wires to terminals nc and c
when using nc contacts.
Figure 3.3 Wiring Diagram