Gantner Q Series - Strain-Gauge Quarter Bridge; Inductive Full and Half Bridges

Vers. No. 6.1
62 Released: 25/04/2017
4 Connecting the modules → Q.bloxx A106: Connecting sensors and I/O
bridges the side drawn in broken lines and the connection 10 are
omitted.
The bridge excitation voltage can be 2.5 V or 5 V (DC or CF).
Fig. 4-46 A106, measurement with full and half bridges.
Tip
Information about the types of circuit and the respective advan-
tages and disadvantages can be found in Section 6.3, Connecting
sensors with sensing leads, page 143.
4.13.2 Strain-gauge quarter bridge
For the connection of strain-gauge quarter bridges you need a
special connecting plug which contains the completion resis-
tances. The plug can be obtain
ed under the designation Q.bloxx
Terminal B4/120-A106 with120  or B4/350-A106 with 350  from
Gantner Instruments GmbH
.
The bridge excitation voltage can be 2.5 V or 5 V (DC or CF).
IMPORTANT
The plug must have the same resistance values as the strain
gauges used, because otherwise no measurement is possible.

Select a half-bridge circuit as the type of bridge for the channel.
Fig. 4-47 A106, measurement with strain-gauge quarter bridge
using Q.bloxx Terminal B4.
4.13.3 Inductive full and half bridges
With inductive full bridges all connections are occupied. If the
sensor has no sensing leads, you specify this during the module
configuration (Type column). With half bridges the side drawn in
broken lines and the connection 10 are omitted.
The bridge excitation voltage can be 2.5 V or 5 V.
9
(10)
5 (+)
7
8
6 (–)
120 Ω
350 Ω
6
7
9
6
7
9