Bridge mode and cabling
TEDS Class 3
TEDS
Class 2
optional
Bridge sensor
Shunt
-
+
R1
R2
R4
R3
Amplifier
-1
Excitation
Sense (-)
Excitation (-)
Sense (+)
Excitation (+)
120 Ω
-
¼ bridge
Signal (-)
Signal (+)
½ bridge
Signal ground
TEDS
Control
Teds (+)
Teds (-)
+
-
+V
-V
TEDS class 2/3
External shunt
CAL
Signal conditioner
+
-
+
-
U
excit
Int shunt
350
10 MΩ
10 MΩ
Ω
-
¼ bridge
Pos/neg
Int/ext
Figure 12.47:
Bridge mode block diagram
10
2
3
4
5
6
7
8
9
11
14
13
12
1
Sense
Excitation
Sense
(+)
Excitation
(+)
Signal (-)
(-)
(-)
Signal (+)
Signal ground
-
+
R1
R2
R4
R3
White
Red
Drain wires
Green
Grey
Blue
Black
Foil shield
Earth shield
12
2
11
1
7
4
8
Housing
Drain wire
Foil shield
KAB7.5/00-2/2/2
LS 2
Use double shielded wires to reduce high frequency noise
GN1640B
GN840B
Full bridge
Keep wire length < 5 cm
Figure 12.48:
Recommended 6 wire full bridge connection
GEN3i
278
I3763-3.1 en HBM: public
