Electrical Connection; Connection In A Six-Wire Configuration; Connection In A Four-Wire Configuration - HBM PW29P Series Mounting Instructions

PW29P
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Electrical connection

The following can be connected for measurement signal conditioning:
 Carrier‐frequency amplifiers
 DC amplifiers
designed for strain gauge measurement systems.
The load cells are supplied in the standard version with an 8‐pin plug in a
six‐wire configuration. The load cells are optionally available with different
cable lengths and with a hygienic design connection cable.
4.1 Connection in a six‐wire configuration
2
3
4
5
Fig. 4.1: Connector pin assignment
With this connector pin assignment, the output voltage at the measuring
amplifier is positive when the transducer is loaded (see Fig. 3.1). The pin
assignment for the cables available as accessories can be found in Section 7
on page 16.
4.2 Connection in a four‐wire configuration
When transducers in a six‐wire configuration are connected to amplifiers in a
four‐wire configuration, the sense leads of the transducer must be connected
to the corresponding excitation voltage leads: Marking (+) with (+) and
marking (-) with (-), see Fig. 4.1. 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.
A3578-1.0 en/de/fr
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Plug‐in contact 1 = measurement signal (+)
1 Plug‐in contact 2 = not in use
Plug‐in contact 3 = sense lead (+)
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Plug‐in contact 4 = not in use
Plug‐in contact 5 = sense lead (-)
Plug‐in contact 6 = excitation voltage (-)
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Plug‐in contact 7 = excitation voltage (+)
Plug‐in contact 8 = measurement signal (-)
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HBM