Vers. No. 6.1
68 Released: 25/04/2017
4 Connecting the modules → Q.bloxx A107: Connecting sensors
Fig. 4-58 A107, measurement with full bridges.
4.14.7 Strain-gauge half and quarter bridges
For the connection of strain-gauge half or quarter bridges you
need a special connecting plug which contains the completion
resistances. The plug can be obtained under the designation
Q.bloxx Terminal B4/120-A107 with120 or B4/350-A107 with
35
0 from Gantner Instruments GmbH.
T
he bridge excitation voltage is 2.5 V.
For strain-gauge quarter bridges the plug must have the same
resistance values as the strain gauges used, because otherwise
no measurement is possible.
Since, for reasons of stability, all necessary completion resis-
tances are located in the Q.bloxx Terminal, you have to select a
full bridge circuit as the bridge type for the channel.
Fig. 4-59 A107, measurement with strain-gauge half bridge and
quarter bridge using Q.bloxx Terminal B4.
4, 9
3, 8
1, 6 (+)
5, 10 (GND)
350 Ω
3, 8
2, 7
1, 6
3, 8
2, 7
1, 6
3, 8
5, 10
2, 7
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