Burkert Type 8045 - Manual (Page 17)

17
Installation and wiring
Type 8045
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Connect the negative power supply terminal to the earth to sup-
press the effects of common mode currents. If this connection
cannot be made directly, a 100 nF/50 V capacitor can be fitted
between the negative power supply terminal and the earth.
→
Special attention has to be paid if the device is installed on
plastic pipes because there is no direct earthing possible.
Proper earthing is performed by earthing together the metallic
instruments such as pumps or valves, that are as close as pos-
sible to the device. If no such instrument is near the device,
insert metallic earth rings inside the plastic pipes upstream and
downstream the device and connect these parts to the same
earth. The earth rings must be in contact with the fluid.
Power supply
Valve, pump,... (or earthing rings,
not provided, inserted into the
pipe)
Power cable shield
+
-
18-36VDC
1)
Pipes in plastic
1) If a direct earth connection is not possible, fit a 100 nF / 50 V
capacitor between the negative power supply terminal and the earth.
Fig. 10: Equipotentiality skeleton diagram with pipes in plastic
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