Electrical Connection; Connecting The Pressure Switch; Terminal Assignment; Earthing The Pressure Switch - Hydropa DS-4 7 Serie Anleitung

6.4 Electrical connection

DANGER of hazardous electrical voltage!
Electrical work should be entrusted exclusively to a trained skilled electrical
worker.

6.4.1 Connecting the pressure switch

The electrical connection should be established by a skilled electrical engineering worker in
compliance with prevailing safety and accident prevention regulations. Pertinent installation and
operating regulations (e.g. for cable cross-sections, fuse protection, protective earth connection)
should be observed. Power supply conforming to EN 50178, SELV, PELV. Ensure when
introducing and screwing the connection cable that cable conductors are connected in accordance
with regulations to connection terminals. Ensure that the connection cable is not bent to avoid
short circuiting and interruptions.
Observe the 5 electrical safety rules:

6.4.2 Terminal assignment

The pressure switch is delivered from the factory with a cable socket conforming to
. Please refer to the technical data for the respective pressure switch for further
model type A
connection options.
Terminals 1-2: contact breaks if pressure rises
Terminals 1-3: contact makes if pressure rises

6.4.3 Earthing the pressure switch

Ensure that the pressure switch is adequately earthed:
 The protective earth (PE ) should be connected in compliance with regulations for the
electrical connection.
BA-KDS/GB/2010-REV1
Operating Manual / Piston Pressure Switch
5 Safety Rules
- Disconnect
- Secure against reactivation
- Ensure that the unit is de-energized
- Earth and short circuit
-
Cover or cordon off adjacent energized
parts.
EN 175301-803,
Terminals 1-3: contact breaks if pressure rises
Terminals 1-2: contact makes if pressure rises
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