Installation and connection
26
PEM330-333_D00004_01_M_XXEN/08.2015
4.6.3
PEM333-P
Abb. 4.8: Wiring diagram
Legend to wiring diagram
1
Connection RS-485 bus
2
Supply voltage. Power protection by a 6 A fuse, quick response. If being
supplied from an IT system, both lines have to be protected by a fuse.
3
Digital inputs
4
Pulse outputs (opto-coupler) for kWh and kvarh
max. valid external voltage 80 V; max. switching current 50 mA
5
Measuring voltage inputs: The measuring leads should be protected
with appropriate fuses.
6
Connection to the system to be monitored (connections I… which
are not required have to be short-circuited)
D+
P1 (RS-485)
D-
SH
kWh
• l11
l12
l22
l32
L1
L2
L3
N
• l21
• l31
-
+
DI1
DI2
DIC
A2/- A1/+
U
S
L1
L1
I11
I12
I21
I22
I31
I32
L2
L2
L3
L3
N
N
DI1
DI2
DIC
kvarh
-
+
kWh+
kWh-
kvarh+
kvarh-
1
2
3
4
5
6