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7. Electrical connections
Function
Measuring input AC current
AC voltage
RS 485
(PROFIBUS DP)
Power supply AC
DC
If power supply is taken from the measured voltage
internal connections are as follow:
Application (system)
Single-phase AC current
4-wire, 3-phase
symmetric load
All other (apart from
A15 / A16 / A24)
Bus Cable Termination
Both ends of the bus cable must be fitted with bus
terminators. This ensures that:
– the conductor has a fixed rest voltage,
– reflections in the cable are minimized and
– the bus has an almost constant load.
System /
application
2
Single-phase
AC system
(A11)
L1
N
Connection
IL1
1 / 3
IL2
4 / 6
IL3
7 / 9
UL1
2
UL2
5
UL3
8
N
11
VP
15
RxD/TxD -P
16
RxD/TxD -N
17
Shield
18
RxD/TxD -P'
19
RxD/TxD -N'
20
DGND
21
~
13
~
14
+
13
–
14
Internal connection
Terminal / System
2 / 11
(L1 – N)
2 / 11
(L1 – N)
2 / 5
(L1 – L2)
11
1
3
L1
N
15
16
17
18
19
RS 232
1
2
3
4
5
I L1
I L1
I L2
I L2
U L1
U L2
Measuring input
BF = Bus Failure LED
The slave is in the state "Baud Search" and does not
receive valid telegrams
BA = Bus Aktive
The slave is exchanging data cyclically
BD = Bus Diagnosis LED
Lit:
Parameter error
Flashing:
Configuration error
Measuring inputs
Terminals
2
11
1
3
k
l
K
L
20
21
22
23
24
25
26
6
7
8
9
11
13
14
I L3
I L3
U L3
N
–
2
11
1
3
u
v
k
U
V
L1
K
N
Front
l
L
37
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