364Ax-Gx Instruction Manual
19
Wiring requirements
For signal / power connection use twisted, stranded pairs of wiring no 18 to 22 AWG / 0.8 to 0.35 mm
2
Ø up
to 5,000 feet (1 500 meters). Longer loops require larger wire.
If a shielded wire is used the shield should be grounded only at one end, not b oth ends. In case of wiring at
transmitter end, use the terminal located inside the housing marked with the symbol:
Protective Earthing
Wire this ground connection marked with the symbol to a suitable earth ground.
For a transmitter measuring loop an earth ground should maintain a resistance of 5 ohms or less.
Use a heavy conductor, at least 15 AWG / 1,6 mm
2
Ø
WARNING !
A protective grounding connection is absolutely necessary to ensure personnel protection, to protect against
surge and to prevent explosions in potentially explosive atmosphere.
WARNING !
The surge protection is always present and if the transmitter is installed in a Hazardous classified location, it
must be powered from a voltage source isolated from mains (galvanic separation). Furthermore the potential
equalization for the entire powering cable must be guaranteed since the intrinsic safety circuit of the
transmitter is grounded.
Electrical connection
WARNING !
Do NOT make any electrical connections unless the electrical code designation stamped on the transmitter
data plate agrees with the classification of the area in which the transmitter is to be installed. Failure to
comply with this warning can result in fire or explosion.
Hazardous
(Classified)
Location
Unclassified
Hazardous
Location
