VXi VT1529A/B 사용자 설명서
Field Wiring 47
Device
Under Test
Device
Under Test
Device
Under Test
Device
Under Test
pressure
- power
P
to
V
P
to
V
+ power
Shield
Example for
Powered
Transducers
Example for
Powered
Transducers
A
B
Shield
+ power
- power
pressure
Remove Jumper to
break Ground Loop
(shield connected to
ground at transducer)
break Ground Loop
(shield connected to
ground at transducer)
Leave Jumper
in Place
(transducer floating)
in Place
(transducer floating)
Remove Jumper to
break Ground Loop
(shield connected to
ground at transducer)
break Ground Loop
(shield connected to
ground at transducer)
Hi
Lo
Guard
Hi
Lo
Guard
C
D
E
Hi
Lo
Guard
Example for
Thermocouples
Shield
Shield
Leave Jumper
in Place
(transducer floating)
in Place
(transducer floating)
Hi
Lo
Guard
Hi
Lo
Guard
Current Hi ( + )
Jumper may be left in
place as Current Lo (+)
is at VT1422A GND Potential
place as Current Lo (+)
is at VT1422A GND Potential
Shield
Example for
Resistive
Transducers
Current Lo ( – )
Figure 2-9. Preferred Signal Connections