National Instruments SCXI-1314T Installation Manual page 7

Note AI – is left unwired. Set the SCXI-1520 module to internal half-bridge completion.
Refer to the SCXI-1520 User Manual for more information.
TEDS Transducer
TEDS EEPROM
© National Instruments Corporation
Quarter-Bridge
This section shows the quarter-bridge signal connections. Figure 3 shows
the quarter-bridge circuit wiring diagram.
SCXI-1314T
R
L
2 AI +
R
L
6 EX +
R
4
(gauge)
R
3
(dummy)
7 EX –
R
L
1 SCA
R
L
10 SCA
R
L
R
L
4 RS +
5 RS –
R
L
8 T +
9 T –
Figure 3. Quarter-Bridge Circuit Diagram
The following symbols apply to the circuit diagram and equations:
• R and R are half-bridge completion resistors.
1 2
• R is the quarter-bridge completion resistor (dummy resistor) you
3
provide externally to the SCXI-1314T.
• R is the active measuring element.
4
SCXI-1520
Bridge Configuration
Set to Half Bridge
R
1
R
2
Shunt
Cal A
R
S
Digital
TEDS
Bus
Comm Communication
Circuitry
7 SCXI-1314T TEDS Bridge Sensor Terminal Block
+
V
AI
–
+
V
EX
–
+
V
RS
–
Digital
Circuitry