9
４－５．Caution at wiring construction
４－６．Applicable cable
Signal transmission
: CVVS 1.25mm
2
, 2C or equivalent
Transmission distance
: Within 600m at total
Cable O.D.
: φ8-φ11mm
４－７．Example of cable connection
(1) In case of non-explosion proof system
① Lead the applicable cable through cable inlet
and connect to the terminal strip.
② Connect the other end cable to the indicator/alarm unit.
③ Connect the shield’s drain wire at the indicator/alarm unit
to the ground.
(2) In case of intrinsically safe system
You can build the intrinsically safe system by adding
optional zener barrier between detector head and indicator/alarm unit.
① Lead the applicable cable through cable inlet and connect to the terminal strip.
② Connect the optional zener barrier between this unit and indicator/alarm unit at
non-hazardous area. (See below fig.)
③ Connect the other end cable to the indicator/alarm unit.
④ Connect the shield’s drain wire at the indicator/alarm unit to the chassis ground.
Example of intrinsically safe system
・When make wiring construction, take care not to damage the internal electronics circuit.
・When handle the detector unit, put it at horizontal position. If put it vertically, it tends to fall and
damage the detector.
・Power cable and signal cable shall not be laid down together with motive power cable such as motor,
etc.
・When use twisted cable, take care not to contact a part of core cable with other core cable.
CAUTION
！
ケーブルの接続
ケーブル
－
＋
端子台
センサ
リード線
Sensor lead
wire
Terminal
strip
Cable connection
1
3
2
4
De
te
ct
or
h
ea
d
In
di
ca
to
r/
al
ar
m
un
it
Zener barrier
（MTL7761Pac）
Max. 600m
Hazardous area
Non-hazardous area
Connection cable
Connection
cable
Cable
