VTI Instruments EX1629 - Page 30

VTI Instruments Corp.
30 EX1629 Preparation for Use
TEDS
COMM
External customer
shunt cal
resistor terminals
Internal
Rcal
55K
-R Cal
+R Cal
Pin 5
Pin 4
Strain
Bridge
8-pin telcom
connector (RJ-45)
350
120
User
10K
10K
+ Excitation
- Excitation
Quarter-Bridge
(1 of 48 channels)
+Excitation
+Sense
-Sense
+Excitation Sense
-Excitation Sense
-Excitation
+Excitation Sense
-Excitation Sense
RJ-45 Pin#
12345678
Pin 2
Pin 7
Pin 6
Pin 3
Pin 8
Pin 1
10K
10K
Instrumentation
Amplifier
+
-
x1
x10
x100
Hi
Lo
Shield
150
150
-Sense
-Cal
AGND
+Sense
Wagner
+Cal
AGND
430 kHz
LOW-PASS
FILTER
60.3 kHz
LOW-PASS
FILTER
ADC
TRIFILAR
FILTER
FIGURE 2-3: QUARTER-BRIDGE CONFIGURATION
NOTE The ±Excitation Sense lines must be left open.