4.3: Electrical Connections (continued)
For best performance in electrically noisy environments, the case of the LDX-4
should be connected to a local earth. This can be achieved via the mounting
bracket. This earth connection is not a safety earth, but is part of the overall elec-
trical screening scheme.
The wiring layout arrangements are similar for LDX-4 fitted with EMC glands and
screened cable.
Separate Power Supply and Signal Out wires
Transducer
0V
+
V
E
V
O
U
T
0
V
I
O
U
T
C
O
AR
SE
G
AIN
1
2
3
4
5
6
(
7)
FINE GAIN
COARSE
OFFSET
-VE
+VE
5V
2.5V
FI
N
E
O
FF
SE
T
10
K
2K
- -
¦R
¦
|F
|
- -
D
IV
2
X2
(X
4)
G BK W B R
LO
H
I
Signal O ut
Power Supply
Power Supply and Signal Out wires from one end only
Connections to the power supply should be routed to one side as shown. This
helps to reduce interference between power supply wires and the more sensitive
parts of the circuitry.
Transducer
0V
+
V
E
V
O
U
T
0
V
I
O
U
T
C
O
AR
SE
G
AIN
1
2
3
4
5
6
(
7)
FINE GAIN
COARSE
OFFSET
-VE
+VE
5V
2.5V
FI
N
E
O
FF
SE
T
10
K
2K
- -
¦
R
¦
|F
|
- -
D
IV
2
X2
(X
4)
G BK W B R
LO
H
I
Signal O ut
Power Supply
4.4: Connecting the Transducer
Transducers fitted with a 5-pin DIN plug are simply screwed into the case
mounted socket. Transducers not fitted with a plug should be wired to the plug
supplied. For the half-bridge only variant see section 6.0.
C
O
R
E
Pr
im
ar
y
Red
Blue
Ve
G reen
Yellow
W hite
V
V
A
B
Centre Tap
V
O
M easured
O utput
LVDT Electrical Connections
Red and Blue
Energizing
Green and White
Signal
Yellow
Secondary Centre Tap
Red and White
In Phase for Inward
Displacement
Black
Transducer Body
Ground
