Operating Manual EMGZ470A/472A
5
4
System Description
fig. 1: Basic structure EMGZ470A.W/472A.W Tension Measuring Amplifier
E470001e
4.1
Functional Description
The force sensor measures the tension force in the material and transmits the value as
a mV signal to the electronic unit. The electronic unit amplifies the mV signal
depending on configuration. The resulting feedback value can be read by the
PROFIBUS master. The application dependent calculations will be done by the
PROFIBUS master.
4.2
Force Sensor
The force sensors use the flexion beam principle. The flexion is measured by strain
gauges and transmitted to the electronic unit as mV signal. Power supply exerts
influence to the strain gauges Wheatstone Bridge. The force sensors are therefore
supplied from the electronic unit with a very accurate power supply.
4.3
Electronic Unit EMGZ470A.W/472A.W
Common
The electronic unit contains a microprocessor to handle all calculations and
communications, the highly accurate sensor power supply and the signal amplifier for
the measuring value. In addition, a PROFIBUS interface is integrated to the electronic
unit.
The EMGZ470A.W.D /472A.W.D has the complete electronic unit twice to evaluate
two measuring ranges.
EMGZ470A.W
for 1 force sensor
EMGZ472A.W
for 2 force sensors (sum signal)
EMGZ470A.W.D
for 1 double range force sensor
EMGZ472A.W.D
for 2 double range force sensors
(1 sum signal per measuring range)
