14
4.2 Electrical connection
The electrical connection should be carried out by an authorised electrician
in accordance with local regulations.
Connect SI 010 CNV to 230/115 VAC, 50/60 Hz or 24 VDC. Never connect
more than one voltage, and check with a voltmeter which voltage is
available. Set the ST jumpers correctly. See section
.
The voltage supply built into SI 010 CNV fulfils the PELV requirements, and
the PE terminals (protective earth) and GND are connected.
Standard procucts from Grundfos Direct Sensors can be supplied via up to
2.9 m cables. See the installation and operating instructions of the sensor.
As far as possible, keep the connecting cables away from frequency
converters and other noisy electronic equipment.
Use twisted-pair cable (minimum 2 x 0.5 mm
2
) between SI 010 CNV outputs
and other equipment. Connect inputs and outputs according to the tables in
section
4.2.1 Connection of supply voltage and sensor
.
Warning
Before beginning the electrical connection, make sure that
the power supply has been switched off and that it cannot be
accidentally switched on.
Caution
The supply voltage for SI 010 CNV can be 230/115 VAC
50/60 Hz, ± 10 % or 24 VDC (see section 4.2.1 Connection of
supply voltage and sensor).
Note
If the supply cable to SI 010 CN has no earth conductor,
connect a separate earth connection.
Warning
Wrong connection may cause highly dangerous situations
and destroy SI 010 CNV and possibly equipment connected to
SI 010 CNV.
Note
If SI 010 CNV is supplied from an external 24 V voltage supply,
the supply MUST be PELV-approved.
Caution
Connect SI 010 CNV to the public supply network via a switch
and according to the local regulations. In order to ensure safety
and correct function, it is important that the pipe system in
which the sensor is mounted has an efficient earth connection.
