ADwin-Pro II
Hardware, manual Dec. 2018
155
Pro II: Extension and Interface Modules
Pro II-SG-4/18 Rev. E
ADwin
5.8.3 Pro II-SG-4/18 Rev. E
The module Pro II-SG-4/18 Rev. E provides 4 inputs for strain gage measure-
ment ans 2 analog inputs and is suitable for tension and compression. All
inputs are differential and connected to an 18-bit ADC via a multiplexer.
Strain gages can be connected with a half bridge or full bridge circuit, and with
6-wire or 4-wire circuit.
The minimum nominal resistance of strain gage depends on the excitation vol-
tage EX; with EX=9.80V the minimum resistance is 100
Ω
, with EX=1.25V it is
13
Ω
.
The module Pro II-SG-4/18 Rev. E provides the bridge excitation vol-
tage EX for the strain gage wiring; via software, the excitation voltage
can be set separately for each strain gage wiring. From each strain
gage wiring, 3 voltages can be measured: excitation voltage EX,
sense voltage SX, and bridge voltage B. In addition, 2 analog inputs
AIN13/AIN14 can be measured.
All pins are available on a 37-pin D-Sub female connector. All AGND
pins are connected internally.
Full bridge, 6-wire
Half bridge, 6-wire
Full bridge, 4-wire
Half bridge, 4-wire
Abb. 140 – Pro II-SG-4/18 Rev. E: Strain gage wiring
B (+)
B (–)
EX (–)
SX (–)
EX (+)
SX (+)
AGND
AGND
EX (–)
SX (–)
EX (+)
SX (+)
B (+)
B (–)
B (+)
B (–)
EX (–)
EX (+)
AGND
AGND
EX (–)
EX (+)
B (+)
B (–)
SG-4
