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D-160TS-7-E
17
8.2 Wiring Considerations
①
Use crimp terminals for M4 screw at the cable ends.
②
This instrument uses the cable gland (pressure-tight packing) method of IEC harmonized standards for
the external conductor entry of flameproof explosionproof configuration. Do not use cable glands other
than the accompanying cable gland (not included with non-explosionproof products). Select the rubber
packing suitable for the finished cable OD from three sizes (
φ
11,
φ
12,
φ
13, of which
φ
11 packing is
installed).
Packing nominal size
Packing ID
Cable OD
11mm
φ
11
10.1
~
11mm
12mm
φ
12
11.1
~
12mm
13mm
φ
13
12.1
~
13mm
◇
Precautions on cable gland (pressure-tight packing)
◇
For non-explosionproof models, take the following into consideration.
1. The pressure-tight packing must fit the finished cable OD.
2. Securely tighten the pressure-tight packing so that there is no gap between the packing and the cable.
3. If not using a pressure-tight packing, make sure to take necessary measures to prevent moisture and
dust from entering.
③
To waterproof the cable entry, take the following into consideration.
★
Make sure that wiring parts (conduit, etc.) meet the standards.
★
Extend the cable downward from cable entry to prevent rainwater from traveling along the cable and
entering the instrument.
④
To minimize the possibility of stray current pickup, the field wiring should be routed sufficiently away from
existing power cables or power circuits.
⑤
For intrinsic safety, ground "EARTH" or external ground terminal using class A grounding (with the ground
resistance 10Ω or less).
★
Ground must be installed alone in non-hazardous area using class A grounding.
⑥
To avoid the influence of noise, do not open the terminal cover for maintenance (Fig.8.1).