Pressure Sensor - Siemens Sinumerik 840D Series Function Manual

10.03
7.3

Pressure sensor

7.3.1 Sensor equipment
General
Instructions for
use
Selection of
pressure sensor
(recommended
types)
 Siemens AG, 2003. All rights reserved
SINUMERIK 840D/SIMODRIVE 611 digital, HLA Module (FBHLA) - 10.03 Edition
Note
For connector assignments, see Subsection 5.1.2.
The task of pressure sensors is to convert the mechanical "pressure" variable
into the electrical "voltage" or "current" variable.
The pressure sensors from the Bosch Rexroth product range are suitable for
pressure monitoring and control applications in mechanical engineering, injec-
tion molding machines, presses and many other areas.
The most important features of the sensors are
S
pressure sensor element consisting of high-quality steel membrane (spring
material), coated with thin-layer strain gauges in full-bridge connection.
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integrated electronic circuitry with temperature compensation
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signal output proportional to pressure
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zero point and sensitivity are calibrated exactly by manufacturer
Note
Pressure sensor cables with pre-assembled sensor end are not available. The
following cable information is intended only as an example.
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Sensor must be mounted in vertical position with connector pointing down-
wards.
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The sensor must be installed in the hydraulic system in such a way as to
prevent air cushions developing between the sensor membrane and the
pressure medium.
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Pressure medium: Hydraulic fluid;
other fluids only after consultation with Bosch Rexroth.
Sensors with a signal voltage of U=0...10 V are available in the following vari-
ants for the HLA module:
7 Peripherals/Accessories
7.3 Pressure sensor
7-227