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3.4 Wiring Precautions
This section is described wiring only for flow tube
side. Please see "Wiring" in AM11 Magnetic Flow
Converter Instruction Manual for converter side.
3.4.1
Protective Grounding
CAUTION
Please be sure to connect protective grounding
of ADMAG with cable of 2mm
section in order to avoid the electrical shock to
the operators and maintenance engineers and
prevent the influence of external noise. And
further connect the grounding wire to the
mark (100Ω or less).
3.4.2
General Precautions
Please give attention to the followings in wiring.
CAUTION
• In case the ambient temperature exceeds 50°C
(122°F), please use heat-resistant cable with
maximum allowable temperature of 70°C
(158°F) or above for JIS flameproof type.
• Please pay attention to avoid the cable is
bended excessively.
• Please do not connect cables outdoors in case
of rain to prevent damages from dew formation
and to keep insulation inside the terminal box
of the flow tube.
• Please do not splice the cable between a flow
tube and a converter if it is too short. Please
replace the short cable with the cable which is
appropriate length wholly.
• The all cable ends are to be provided with
round crimp-on terminal.
• The signal cables must be routed in separate
steel conduit tubes or flexible tubes.
• Please keep conduit or flexible tube water-tight
using sealing tape.
• Please ground each of a flow tube and a
converter separately.
• Please cover each shield of the signal cable
with PVC tube or PVC tape to avoid contacting
between two shields; shield and case.
• When waterproof glands or union equipped
waterproof glands are used, the glands must be
properly tightened to keep the box watertight.
2
or larger cross
3-16
• Please be sure to fully tighten the terminal box
cover before the power is turned on.
• Please be sure to turn off the power before
opening the terminal box cover.
3.4.3
Cable Types
(1) Dedicated Signal Cable(AM011)
The flow signal is transmitted via this dedicated cable.
The cable is constructed with double shielding over the
two conductors, and used heat-resistant vinyl as the
outer jacket material.
Finished diameter:
Maximum length:
Maximum temperature: 80°C (176°F)
Figure 3.4.1
Dedicated Signal Cable AM011
IMPORTANT
If the cable is longer than required, cut off any
extra length, rather coiling it up, and terminate
the conductors as shown in Figure 3.4.2. Avoid
using intermediate terminal boards to extend the
cable length, or this will interrupt the shielding.
(WHITE)
(BLACK)
(RED)
On the converter
side
L (SPECIFIED LENGTH)
20 (0.8)
Figure 3.4.2
Treatment of Dedicated Signal Cable
3. INSTALLATION
10.5 mm (0.413")
200 m (660 ft)
(WHITE)
(BLACK)
On the flow tube
AM011*A
IM 1E6D0-01E
(RED)
side
F030402.EPS
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