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Verfügbare Sprachen
Verfügbare Sprachen
ME30
2
Electrical Connection
2.1 Transducer Connection
Strain gauge transducers are connected by means of 6-wire circuits.
With transducers in 4-wire technology the sensing leads are not needed. In
this case the contacts 32a+c and 28a+c on the connector must be linked.
For cable lengths >50 m, one resistor with half the bridge resistance value
(BR/2) must be solder into the transducer in place of each feedback bridge. If
the transducers are calibrated in six−wire connection, the resistors must be
solder directly into the sensor circuit.
measuring signal (−)
sensing line to 32a (−)
bridge supply voltage (−)
measuring signal (+)
bridge supply voltage (+)
sensing line to 28c (+)
screen
. . . . . . . . . . . . . . . . . .
Fig. 2.1: Bridge connection
The required bridge excitation voltage set by the factory is 5 V(symmetrical
about ground). It can be switched to 2.5 V by switch S25.
U
B
2.5 V
5 V
(factory settings)
The safety barriers SD01A must be wired into the connecting lines (see
chapter 5.4) for transducers in EEx(i) design.
A0261−3.1 en/de/fr
contact
. . . . . .
pin 30a
. . . . .
pin 32c
. .
pin 32a
. . . . . .
pin 30c
. .
pin 28a
. . . . .
pin 28c
pins 31a+c
(alternatively 29a+c)
Bridge resistance
R
≥60...4000 Ω
B
R
≥110...4000 Ω
B
rd
gy
bk
wh
bu
gn
ye
Switch S25
9
HBM
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