SMA SUNNY ISLAND SIC40-MPT, Technical Description

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SMA Solar Technology AG Electrical Connection
Technical Description SIC40-TEN081110 27
5.6 Additional Connections
5.6.1 Signalling Contact
You can connect a signalling contact to your charge controller that automatically closes in case of
battery overvoltage (battery voltage > 65 V).
The signalling contact operates like a make contact and can be loaded with voltage up to 200 V
(DC) and a contact load of 1 A/15 W.
If... Then...
a charge controller is
connected to the system... 1. Route the communication interface cable of the charge
controller to the Sunny Island and insert it into the
"ComSyncIn" socket/"Sync IN" socket in the Sunny Island.
2. Insert a termination connector in the "ComSyncOut"
socket/"Sync OUT" socket in the Sunny Island.
several charge controllers are
connected to the system... 1. Route the communication interface cable of the first charge
controller to the next charge controller (in this case, the
second charge controller) and insert it into the RJ45 socket
of the communication interface.
Follow the same procedure for the first two charge
controllers to connect additional charge controllers.
2. Route the communication interface cable of the last charge
controller to the Sunny Island and insert it into the
"ComSyncIn" socket/"Sync IN" socket in the Sunny Island.
3. Insert a termination connector in the "ComSyncOut"
socket/"Sync OUT" socket in the Sunny Island.
NOTICE!
If a switch in the charge controller short circuits, the battery may be irreparably
damaged.
If a short circuit occurs in the charge controller, the battery is no longer protected against
overcharging.
• SMA Solar Technology AG recommends using the signalling contact to ensure that
in case of a failure, the battery is disconnected from the charge controller by a relay
or contactor.
• If several charge controllers are connected to the stand-alone grid system, a
signalling contact must be connected between each charge controller and the
battery.