Shortening The Cable; Extension Cables; Emc Protection - HBM S9M Notice De Montage

Electrical connection
niques, an EMC-proof shield should be applied in the wire area and this shield­
ing should also be connected extensively (also see HBM Greenline Informa­
tion, brochure i1577).
8.2

Shortening the cable

As the transducer connection uses a six-wire configuration, you can shorten
the 6-wire transducer cable without affecting the measurement accuracy.
8.3

Extension cables

Only use shielded, low-capacitance measurement cables for extension. Ensure
that the connection is perfect, with a low contact resistance.
The cable of a six-wire transducer can be extended with a cable of the same
type.
8.4

EMC protection

Electrical and magnetic fields often induce interference voltages in the
measuring circuit. Therefore:
S Use shielded, low-capacitance measurement cables only (HBM cables fulfill
both conditions)
S Do not route the measurement cables parallel to power lines and control
circuits. If this is not possible, protect the measurement cable with steel
conduits, for example
S Avoid stray fields from transformers, motors and contact switches
S Do not ground the transducer, amplifier and indicator more than once.
S Connect all devices in the measuring chain to the same protective ground
conductor
To ensure the best EMC protection, the transducer, together with the conne­
ction cable and the downstream electronics, should be placed in a shielded
enclosure.
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A03019_05_YI0_04 HBM: public
S9M