HBM Spider8 - S;G Transducers; S;G Full Bridge

9
15
1
8
15-pin socket
D-11
Connecting Ý Connecting transducers
Spider8
3.1 S/G transducers
Connection to carrier-frequency module SR55, SR30
3.1.1 S/G full bridge
S/G transducers - whether half bridge, full bridge or single S/G - are
passive transducers with the following features:
• They must be supplied with an excitation voltage
• They are S/G full bridges
• A transducer is characterised by the following data
- Nominal load (e.g. 20kg)
- Nominal sensitivity (for S/G transducers e.g. 2mV/V)
- Resistance: maximum 1kΩ, minimum 120Ω
Typical S/G transducers are load cells and force transducers.
wh
rd
bk
bu
gn
gy
Measurement signal
Sensor circuit
Sensor circuit
Bridge excitation
voltage
Measurement signal
1
4
2
3
3’
2’
8
15
5
13
12
6
15-pin socket
Bridge excitation
voltage