Azbil SLX 110, User Manual

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Azbil Corporation Installation
Model SLX 110/120 - Smart displacement type level transmitter 1-19
Piping for wiring
Draw wires into the transmitter part case as follows:
• Draw wire into the terminal section of this instrument by setting a conduit pipe
in the conduit hole (G1/2 internal screw) next to this instrument and passing it
through this pipe.
• To prevent precipitation from getting into this instrument, plug the conduit
coupling section with a sealant or plug.
• Route the wiring cable in such a way so as it enters the main unit of this
instrument from the lower section.
• Use a pressure-proof elbow to change the electrical wiring direction (1, 2, 3
indicated in additional specification) if required.
Grounding
There are two grounding terminals; one on the terminal block of this instrument
(internal grounding terminal) and the other on the transmitter part case (external
grounding terminal). Ground either one.
• Use a grounding terminal with a resistance to ground of 100 ohms or less or
connect it to ground of good quality.
• The explosion-proof type absolutely requires grounding.
• Cautions when welding is performed near the transmitter part
• Ground the welding machine and the welding power supply transformer to a place
different from the one for grounding of this instrument. The welding current may
have adverse effects.
Power supply and external load resistance
It is necessary to determine the relationship between the external load resistance
used for this instrument and power supply voltage in such a way as it falls within the
shaded area in the figure below.
The external load resistance refers to a sum total of resistances connected to the
output terminal of this instrument such as the resistance of cables making up the loop
and the internal resistance of the instruments connected at some midpoints.