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Mechanical and electrical installation
18
Data connection with the controller of a group installation
The energy meter must communicate with the controller charging station/control unit via its RS485 interface for the
system’s load management. The Modbus interface depends on the year of manufacture – on older ABL charging sta-
tions it is designed with spring terminals and on newer models it is equipped with RJ45 sockets. METERS | METERL
are compatible with both systems.
Cat 5e or Cat 6 data cables with a cross-section of at least 0.14 mm² are recommended for the wiring. The internal
twisting must be maintained until connection to the respective terminal.
NOTE
Communication via the free interface
In the controller of a group installation, one of the two Modbus interfaces remains unassigned, while the other is
used for communication with the extender charging stations.
Wire the free interface in the controller to the RS485 interface of the energy meter.
Connect the interfaces as follows:
Charging station with spring terminals
Connect the contacts as follows:
Meter contact
Charging station spring
terminal
&
METER – B
(
METER – A
)
METER – M
To terminate the RS485 bus, a wire jumper must also be
inserted between the contacts
(
and
~
on the energy
meter!
A M B
CONTROL
A M B
METER
Charging station with RJ45 interface
Connect the contacts as follows:
Meter
contact
Bus
assignment
Wire colour
T-568B
PIN
assignment
RJ45
&
B
Brown
8
(
A
Brown-white
7
)
M
Blue
4
M
Blue-white
5
To terminate the RS485 bus, a wire jumper must also be
inserted between the contacts
(
and
~
on the energy
meter!
1 2 3 4 5 6 7 8
MODBUS
EN1
MODBUS
ME
TER
M
E
T
E
R
C
N
T
R
L
CONTROL
CONTROL
ME
TER