MTS FlexTest Models 200 - Manual (Page 150)

MTS FlexTest® Models 40/60/100/200 Controller Hardware
Digital Universal Conditioner Mezzanine Cards
Mezzanine Cards 150
Quarter-bridge
configuration
The following figure shows a quarter-bridge configuration. In this
configuration, one half of the bridge resides on the DUC card.
When a quarter-bridge transducer is used, a bridge-completion resistor
(R Completion) is required. The bridge-completion resistor is installed on
the I/O carrier board. Once installed, you must physically set switch SW1A
on the card to connect one end of R Completion to -FBR.
R
Shunt
I/O Carrier Board
Transducer
RJ-50
Cable
Plug
2 1
Cable
Shield
3
Cable Grounding
1 The cable shield connects to the metal
shielding on the RJ-50 cable plug.
2 The cable plug shielding connects to the
I/O carrier board body.
3 The I/O carrier board body connects to
earth ground through the chassis.
DUC
A to D
SW1B
+Ex Sense
-Ex Sense
R
Completion
- Excitation
SW1A
Front-Panel
RJ-50
Connector
+FBR
+Excitation
+FB
-FB
-FBR 6
4
7
5
2
IEEE
1451.4
Circuit
1
10
+ IEEE 1451.4 Class 2
- IEEE 1451.4 Class 2
Wagner
Voltage
Source