8 CC613-Hxx_D00423_02_M_XXEN/11.2020
Function
2.4.1 General functions (depending on the variant)
• The charging system can be equipped with a meter. A Modbus meter is required for digital reading
of the energy consumption. The Modbus RTU wires are attached directly to the charge controller.
• A 12 V power supply is needed for operation.
• Power flow toward the vehicle is enabled by enabling the contactor via an integrated 230 V control
relay in the charge controller.
• For fault current detection in an AC charging system, the charge controller features an integrated
residual direct current monitoring module (RDC-M) which uses an externally connected current
transformer. With the integrated monitoring of the DC fault current, only an RCD type A is required
in the charging system.
• Data exchange between the electric vehicle and the charging system is possible via ISO 15118 com-
pliant Powerline Communication (PLC).
• Data management and control functionality of the charge controller:
– Termination of the charging process after tripping of the residual current device (RCD) due to a
residual current.
– Detection of critical fault currents by the RCM sensor. For the vehicle owner, this can be an early
warning, provided that the charge controller is connected to an energy management system
and that it supports this function.
i
The charge controller with residual direct current monitoring module (RDC-M) only works in combination
with the measuring current transformer (to be ordered separately).
I
C
aution
!
Risk of damage when pulling out the measuring current
transformer plug!
If the measuring current transformer plug is pulled out
using too much force, the enclosure and the internal components may be
damaged. Use needle-nose pliers to unlock the measuring current transfor-
mer plug.
2.4.2 Load current and cooling control (temperature monitoring)
The charge controller is equipped with a temperature sensor, which allows the temperature in the environ-
ment of the charge controller to be estimated. Based on this estimation it is possible to dynamically reduce
the charging current or even suspend charging. This feature can serve to maintain the temperature inside the
enclosure within the permissible range for the components used in a charging system. Two temperature
thresholds for charging current reduction and charging interruption can be set via the
Manufacturer
tab.
i
The actual temperature is affected by heat generated by the controller itself.
