MicroStrain, Inc.
17
Connecting a full bridge strain gauge
This example assumes the SG-Link® OEM is configured with the optional internal
full
bridge completion. In this arrangement, the user is responsible for all bridge completion.
It is strongly recommended that shielded wiring be used, as this can significantly reduce
system noise.
Please note that the shield of each cable must be grounded at one location
only, to prevent the occurrence of ground loops. Shielded wiring can be purchased from
Alphawire (part number 1122,
www.alphawire.com
); a sample is included with each
starter kit.
Figure 4
P+ Pin
+ Pin (Signal)
- Pin (Signal)
Ground Pin
Vxc (Pin 1)
S+ (Pin 2)
S- (Pin 3)
GND (Pin 4)
Table 6
Sensor Power
Sensor-
Sensor Ground
S-
P+
Ground
S+
Rg
(Active)
Rg
(Active)
Rg
(Active)
Rg
(Active)
RL*
RL*
RL*
RL*
Internal
Circuitry
*RL=Lead Resistance
Shield
(Drain)
S+
S-
P+
Ground
