YASKAWA VIPA System SLIO Manual page 174

Analog Input
031-1CA20 - AI 1x16(24)Bit Strain gauge (DMS) > Connection variants
4 wire measurement
Parallel connection
174
Sensor properties
Excitation
voltage
U
EXC
2.5V
5V
7.5V
10V
12V
With the 4 wire measurement the U
there is an internal connection between U
The following table shows the properties of the sensors, which can be used with the 4
wire measurement.
Sensor properties
Excitation
voltage
U
EXC
2.5V
5V
7.5V
10V
12V
Normally large mechanical loads are divided to multiple strain gauge DMS load cells and
these parallel connected via a connection box to the strain gauge DMS module. Please
consider that the load cells are aligned together for this operating mode and approved by
the manufacturer. And the current feed capacity of the transducer electronic should not
be overloaded. The current feed capacity is derived from the number of parallel-con-
nected load cells, excitation voltage U
Depending on the excitation voltage U
n 2.5V: maximum current 120mA
n 5V: maximum current 120mA
n 7.5V: maximum current 100mA
n 10V: maximum current 90mA
12V: maximum current 80mA
n
For the calculation of I
EXC
Bridge resistance R
120Ω 350Ω
X X
X X
X X
X X
X X
pins are not connected. With this operating mode
SEN
and U
EXC
Bridge resistance R
120Ω 350Ω
X X
X X
X X
X X
X X
and the bridge resistance.
EXC
, I may not exceed a maximum current:
EXC EXC
the following formula is used:
VIPA System SLIO
B
700Ω
X
X
X
X
X
.
SEN
B
700Ω
X
X
X
X
X
HB300 | SM-AIO | | en | 17-05
1000Ω
X
X
X
X
X
1000Ω
X
X
X
X
X