Connection In A Four-Wire Configuration; Shortening The Cable - HBM S2M Serie Montageanleitung

S2M
The connection cable shielding is connected to the trans­
ducer housing. Transducers with free cable ends must be
fitted with connectors complying with EMC guidelines.
The shielding must be connected extensively. With other
connection techniques, an EMC‐proof shield should be
applied in the wire area and this shielding should also be
connected extensively (also see HBM Greenline Informa­
tion, brochure i1577).
7.2 Connection in a four‐wire
configuration
When transducers with a six‐wire configuration are con­
nected to amplifiers with a four‐wire configuration, the
sense leads of the transducer must be connected to the
corresponding supply leads: marking (+) with (+) and
marking (-) with (-), see Fig. 7.1. This measure also
reduces the cable resistance of the excitation voltage
leads. However, there will be a voltage loss on the supply
leads due to the cable resistance that is still present and
not compensated for by the six‐wire configuration. A
large part of this loss can be eliminated by a calibration,
however, the temperature‐dependent part remains. The
TK value given in the specifications for the transducer
c
therefore does not apply for the cable and transducer
combination when connection is with four‐wire configura­
tion, the cable percentage must be added.
7.3

Shortening the cable

As the transducer connection uses a six‐wire configura­
tion, you can shorten the 6‐wire transducer cable without
affecting the measurement accuracy.
A3592-1.3 HBM: public
Electrical connection
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