NUS-4
Seite 8
NUS-4 K05/0216
6.4 Mechanical connection
Screw the unit in to its place. Use open wrench for
tightening; max torque is 20Nm
After tightening the enclosure can be rotated to the proper
position. (Safety bolt prevents rotation more than 350°)
7. Electrical Connection
Ensure that the power supply is turned off at the source.
The unit may be damaged by electrostatic discharge (EDS) via its terminal, thus
apply the precautions commonly used to avoid electrostatic discharge e.g. by
touching a properly grounded point before removing the cover of the enclosure.
With removal of the cover of the housing and taking out the display module (if
any), the screw terminals can be accessed. Suggested cable core cross section:
0.5 ... 1.5 mm2. Arrange grounding by the inner or outer grounding screw first.
Switch on the unit and make necessary programming.
The actual loop current can be measured with an accuracy of 0.5% by
connecting an voltmeter (in the range of 200 mV) to the points indicated on the
drawing
After programming ensure proper sealing and closing of the cover.
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