Supply Voltage - HBM T10F KF1 Operating Manual

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T10F
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5.4 Supply voltage

The supply voltage has been designed for DC voltage operation (18...30V).
The circuit is intended for use with a safety extra–low voltage (SELV circuit).
It is not intended for connection with a DC supply network according to
EN 61010–1.
The notes in this chapter refer to standalone operation of the T10F without
HBM system solutions.
The supply voltage is galvanically isolated from signal outputs and calibration
signal inputs. Connect an extra–low safe voltage of 18 V...30 V to pin 3 (+)
and pin 2 ( ) of connector 1 or connector 3. We recommend that you use
HBM cable KAB 8/00–2/2/2 and the appropriate connector jacks, since when
operated at nominal voltage (24 V) the cable can be up to 50 m long, or 20 m
long if within the nominal voltage range (see Accessories, page 47) . If the
permitted cable length is exceeded, you may supply the required voltage over
two cables connected in parallel (connectors 1 and 3). This enables you to
double the permitted length. Alternatively an on-site power pack should be
installed.
If you feed the supply voltage through an unshielded cable, the cable must be
twisted (interference suppression). We also recommend that a ferrite element
should be located close to the connection plug on the cable, and the stator
should be earthed.
CAUTION
At the instant of switching on, a current of up to 2 A may flow and this
may switch off power packs with electronic current limiters.
B 23.T10F.90 en HBM
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