Keba KeContact Series, System Manual

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System configuration information
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Load Management
The Load Management of the KeContact M10 distributes the available power line capacity to the connected
vehicles.
“First come, first serve” mode
The vehicle gets the information of the available energy amount till the scheduled departure of the car via an
ISO 15118 message. With this information, the vehicle calculates its charging procedure and reports it to the
KeContact M10. The required energy amount will be reserved and is not available for other vehicles.
"Equal allocation" mode
This mode is used, if the communication with the vehicle is not possible via ISO 15118 protocol. In the case
that there is not enough energy available for all vehicles, all vehicles get the equal amount. If this amount is
too low (below the minimum-current for electric vehicles), the charging of the vehicles will be stopped for a
certain period of time.
A combined mode of both strategies is possible too.
Authorization
The KeContact M10 can manage a „White list“ with authorization codes. Vehicles (Vehicle ID with
ISO 15118) and chip cards (RFID) can be added to this White list.
Counter data
The counter data are not calibrated. It is therefore at the discretion of the operator, whether the data is used
for billing purposes.
3.1.1 Supported communication protocols
The load management software together with the KeContact P20 charging stations supports the exchange of
information according to the following two standards:
Mode 3 Charging
DIN EN 61851-1
Communication via DIN EN-61851-1 is a low level communication,
between Charge Point and Electric Vehicle.
The limitation of the maximum possible charge current is done via
the control pilot pin of the charging cable and is determined by the
Wallbox (and the used cable). The Wallbox can regulate the charg-
ing current by changing the PWM signal (Pulse Width Modulation).
ISO Charging
ISO 15118
Communication via ISO 15118 is a high-level communication be-
tween the Charge Point system and the Electric Vehicle using power
line communication (PLC).
Moment, duration and charging current are negotiated between the
KeContact M10 and the Electric Vehicle.
Initial settings must be made for the entire system:
Which communication protocol shall be supported?

only Mode 3 (no high-level negotiation will be used)

only ISO communication (sole Mode 3 Electric Vehicles will not be able to charge)

combined mode charging (both, Mode 3 and ISO communication is a allowed)