Electrical Connection - HBM WI/5mm-T Montageanleitung

WI
4

Electrical connection

WI series inductive miniature displacement transducers are intended to be
operated on 4.8 kHz carrier frequency amplifiers. The principle of
measurement corresponds to the differential inductance coil principle.
The principle of measurement is based on an active half bridge that is
expanded internally to a full bridge connection. The displacement transducers
can be used in full bridge and half bridge mode.
The connections for transducers, a possible cable extension and measuring
amplifiers are shown in Fig. 4.2.
0
)
1)
When used in full bridge connection, otherwise not used
Fig. 4.2: Electrical schematic diagram of a full bridge, six wire extension
Connecting to terminals:
• The shield can be accessed through a notch in the cable sheath
• Place the shield flat on the body of the casing.
Fitting to a connector:
• Place the shield flat on the connector the casing.
The bridge misalignment is positive when the core is pushed inward.
The bridge misalignment is negative when the core is pushed outward. The
output voltage is zero in the middle of the measuring range.
In order to keep the size down, the transducer is not fitted with integrated
sense leads for operating in a six wire circuit.
When operating with a six wire measuring amplifier therefore, the feedback
inputs must be connected to the appropriate supply leads (see Fig. 4.2).
The effect of the fitted four wire cable is taken into account during factory
calibration.
A1028 3.1 de/en/fr
WH (white) Measurement signal ())
BU (blue) Excitation voltage (+)
GN (green) Sensor circuit (+)
1)
RD (red) Measurement signal (−)
BK (black) Excitation voltage (−)
GY (gray) Sensor circuit (−)
Cable shield Transducer housing
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HBM