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Electrical connection
The following can be connected for measurement signal conditioning:
Carrier‐frequency amplifier
DC amplifier
designed for strain gauge measurement systems.
The S2M force transducer is delivered in a six‐wire configuration.
6.1 Connection in a six‐wire configuration
The transducer is delivered with a 6 m cable with free ends as standard.
Fig. 6.1:
Pin assignment in a six‐wire circuit
With this cable assignment, the output voltage at the measuring amplifier is
positive in the tensile direction when the transducer is loaded.
The connection cable shielding is connected to the transducer housing. Trans-
ducers 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 Information, brochure i1577).
6.2 Connection in a four‐wire configuration
When transducers with a six‐wire configuration are connected to amplifiers
with a four‐wire configuration, the sense leads of the transducer must be con-
nected to the corresponding supply leads: marking (+) with (+) and marking
(-) with (-), see Fig. 6.1. This measure also reduces the cable resistance of
the excitation voltage leads. However, there will be a voltage loss on the sup-
ply 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
HBM
Sense lead (*)
(gray)
Excitation voltage (*)
(black)
Measurement signal ())
(white)
Excitation voltage ())
(blue)
Sense lead ())
(green)
Measurement signal (*)
(red)
Cable shield, connected to the housing
(Shield)
S2M
A3592-1.1 en/de/fr
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