Electrical Connection; Transducer Connection - HBM ME50S6 Bedienungsanleitung

ME50S6
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 (GN + GY) 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 28a (+)
screen . . . . . . . . . . . . . . . . . .
(alternatively 29a+c)
Fig. 2.1: Bridge connection
The required bridge supply voltage is 5 V(symmetrical about ground) as set
factory settings. It can be reduced to 1.0 V by switch S25.
U
B
5 V
(factory settings)
1 V
The safety barriers SD01 must be wired into the connecting lines (see chapter
5.4) for transducers in EEx(i) design.
A0260−3.0 en/de/fr
contact
. . . . . . . pin 30a
. . . . . pin 32c
. . . pin 32a
. . . . . . pin 30c
. . pin 28a
. . . . pin 28c
pins 31a+c
Bridge resistance
R ≥110...4000 Ω
B
R ≥60...4000 Ω
B
rd
gy
bk
wh
bu
gn
ye
9
Switch S25
HBM