Yokogawa MLX - Manual (Page 31)

Page 31 of 49
IM 60A02S01-01E-A
4. Wiring
4.1 Wiring Precautions
IMPORTANT
• For an ambient t
emperature ≥70°C, heat resistant cables shall be used with a
rating of at least 20°C above the ambient temperature.
• Lay wiring as far as possible from electrical noise sources such as large capacity
transformers, motors, and power supplies.
• Remove the electrical connection dust cap before wiring.
• To prevent noise pickup, do not pass signal and power cables through the same
ducts.
• Explosion-protected instruments must be wired in accordance with specific
requirements (and, in certain countries, legal regulations) in order to preserve the
effectiveness of their explosion-protected features.
The MLX is powered by the current output loop and does not require external power. All devices
must be wired in series with the current loop. Twisted pair shielded cable is recommended.
4.2 Selecting the Wiring Materials
(a) Use stranded leadwires or cables which are the same as or better than 600 V grade PVC
insulated wire or its equivalent.
(b)
For an ambient temperature ≥70°C, heat resistant cables shall be used with a rating of at
least 20°C above the ambient temperature.
(c) Use shielded wires in areas that are susceptible to electrical noise.
(d) In areas with higher or lower ambient temperatures, use appropriate wires or cables.
(e) In environment where oils, solvents, corrosive gases or liquids may be present, use wires
or cables that are resistant to such substances.
(f) It is recommended that crimp-on solderless terminal lugs (for 4 mm screws) with
insulating sleeves be used for leadwire ends.