Making The Electrical Connection; Connection Diagrams; Zero Point Adjustment - WIKA PSD-3 Serie Manual De Instrucciones

6. Commissioning, operation

6.2 Making the electrical connection

The instrument must be earthed via the process connection!
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The power supply for the pressure switch must be made via an energy-limited electrical circuit in
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accordance with section 9.3 of UL/EN/IEC 61010-1 or an LPS to UL/EN/IEC 60950-1 or class 2 in
accordance with UL1310/UL1585 (NEC or CEC). The power supply must be suitable for operation
above 2,000 m should the pressure switch be used at this altitude.
For cable outlets, make sure that no moisture enters at the cable end.
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Connection diagrams

Circular connector M12 x 1; 4-pin
Assignment
U U - S
+
1 3 2

Zero point adjustment

Check the indicated zero point on the display during commissioning.
Should an offset be displayed as a result of installation, this can be reset in programming mode with the
0SET parameter
Carry out zero point adjustment for relative and vacuum pressure measuring ranges in a
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depressurised state.
Carry out zero point adjustment of absolute pressure ranges from 0 bar absolute
■
(vacuum). Since appropriate references are required for this, we recommend that this is
only carried out by the manufacturer.
WIKA operating instructions pressure switch, model PSD-3x
SP1 / C SP2
+
4 2
Circular connector M12 x 1; 5-pin
Assignment
U U - S
+ +
1 3 5
EN
SP1 / C SP2
4 2
21