Version 2.1
en MBI 46.31 operating instruction.docx
Issue date: 01/2022
Page 30 of 42
Displacement sensors with known rated output:
First check the position of jumper JU1. It provides a 6x pre-
amplification of the measurement voltage.
•
If the rated output (determined independently of the phase) of
the sensor is 60 mV/V or more then the preamplifier can be
switched off (jumper JU1 in plug position J
2
).
•
If the rated output is less than 60 mV/V, it is advisable to
activate the preamplifier (jumper JU1 in plug position J
1
. This
minimizes the temperature-related error.
Normally the output range of the measuring amplifier is set to 4...20 mA (current
output) or 0...+10 V or ±10 V (voltage output) for the nominal stroke of the
displacement sensor used.
Figure 20
Finding R
E
depending on the rated output of the sensor used
(for the standard output range of the measuring amplifier)
•
After having switched the preamplifier on or off, a suitable fixed resistor R
E
must be soldered in. Find the required value for R
E
in Figure 20 and solder a
corresponding fixed resistor to the soldering terminals for R
E
.
NOTE
0
50
100
150
200
250
300
350
400
450
500
0
50
100
150
200
250
300
350
Rated output in mV/V
R
e
in
k
O
hm
pre-amplification off (JU1 in J2)
pre-amplification on (JU1 in J1)
