12
7
Electrical connection
7.2
Connection diagrams
"
LUC-T10, LUC-T20:
2-wire "loop-powered"
#
LUC-T20:
4-wire, including mains power supply
$
LUC-T30:
4-wire, including mains power supply
7.1
Cabling
Use screened two-core
instrumentation cable for the current
output of the LUC-T10, LUC-T20. For
optimal protection against
electromagnetic interference, the
screen should be grounded in the
controlroom or the nearest earthing
point. A good connection to ground is
essential to good screening.
Under certain circumstances, the
digital communication signal may be
affected if unscreened cable is used.
!
4 mA
I+
4
20 mA
I-
5
V
V
+
+
H
H
+
L+
L1
1
L-
N
2
3
L+/L
1
+
L–/N
–
$
LUC-T30
4-Wire, including mains power supply
18 V ... 36 V DC, 180 V ... 250 V AC
90 V ... 127 V AC
!
4
+
4
mA …
+
d4
d2
–
20 mA
–
5
V
V
+
+
H
H
+
"
LUC-T10, LUC-T20
4 mA ... 20 mA
!
4 mA
I+
4
20 mA
I-
5
V
V
+
+
H
H
+
L+
L1
1
L-
N
2
3
L+/L
1
+
L–/N
–
#
LUC-T20
4-Wire, including mains power supply
4 mA ... 20 mA
18 V ... 36 V DC
180 V ... 250 V AC
90 V ... 127 V AC