GRAPHTEC gl7000 User Manual page 59

Descriptions of the strain gauge and bridge circuit configuration
The internal bridge circuit of the strain gauge wiring is configured with DIP switch, as shown in the figures
below.
When the bridge voltage is used in more than 5 V, the more than 350Ω gauge resistance should be used.
If using 120Ω gauge resistor, the module may be damaged.
2-wire
1/4
3-wire
bridge
4-wire
3-wire
1/2 R
4-wire
bridge
R
R
5-wire
R
R
4-wire
R
Full
bridge
R
6-wire
R
Wiring strain gauge
5 4
R
1
9 8
5 4
R
1
9 8
5 4
R
1
9 8
5 4
R
1
9 8
R
2
5 4 3
1
9 8
2
5 4 3
1
9 8
2
R
5 4
1 4
9 8
R
2 3
R
1 4 5 4
R 9 8
2 3
Bridge circuit
R
3 2 1 1
7 6
R
1
3 2 1
Shunt resister
7 6
R
Remote sensing circuit
R
1
3 2 1 Shunt resister
7 6
R
Remote sensing circuit
R
1
3 2 1
R
2
7 6
Remote sensing circuit
R
2 1
1
R
2
7 6
Remote sensing circuit
2 1
R
1
Shunt resister
R
7 6
2
R R
1 4
3 2 1
R R
2 3
7 6
e
R R
3 2 1
1 4
R R
2 3
7 6
e
CHAPTER 2 Checks and Preparation
Bridge resister
120Ω
R
ON
E
R
R
1 2 3 4 5 6 7
e
R
ON
E
R
1 2 3 4 5 6 7
e
R
ON
E
1 2 3 4 5 6 7
R
e
R
ON
E
R
1 2 3 4 5 6 7
e
R
ON
E
1 2 3 4 5 6 7
R
e
R
ON
E
1 2 3 4 5 6 7
R
e
ON
E
Remote sensing circuit
Shunt resister
ON
E
1 2 3 4 5 6 7
350Ω
ON
1 2 3 4 5 6 7
ON
1 2 3 4 5 6 7
ON
1 2 3 4 5 6 7
ON
1 2 3 4 5 6 7
ON
1 2 3 4 5 6 7
ON
1 2 3 4 5 6 7
1 2 3 4 5 6 7
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