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6.
Adding extra connectors (Satellites)
Several charging stations without a modem (Satellites) can be linked to a charging station with
a modem in a hub / satellite connection thus forming a grid. The grid can support up to a
total of 20 sockets. The advantages are that control of the charging stations is simpler and
that, for locations with a poor GSM link, only a single modem has to be installed externally.
Also a smartgrid can be established over all sockets thus optimizing power usage, enabling
more electrical vehicles to charge simultaneously should power limitations exist The Satellite
charging stations are connected in a chain.
•
Use a green 4-pole plug on the Satellite ”S” side and a black 2-pole plug on the Hub side
of the controller. These are available as a separate set, part #471040.
•
Make the connection below. The network must be set up with a cable suited to the RS485
protocol. (STP/FTP, Profibus or equivalent cable).
•
The maximum number of sockets that may be connected to a single modem is 20.
•
The network must be closed off with a terminal resistance of 120
Ω
at terminals 28 and
29, when more than 6 sockets are installed. The terminator resistance is available as a
separate set, part #471041.
•
In the case of a Star or T network, reflections can occur in the cable. This method of
installation is not possible for this use.
For correct performance of the smartgrid it is essential that you contact your supplier to set
the maximum power available on the grid. If multiple three phase satellite stations are
connected in the smartgrid it is also advisable to swap the primary phase to distribute power
consumption as evenly as possible over all phases. Be sure to note the connector number
printed on the mode 3 controller board and the phase it uses as its primary phase. For optimal
performance of the smartgrid it is essential to inform your supplier of these changes as well.