Relay
SMA Solar Technology AG
132
SBU2200-TEN083320
Technical Description
Assignment of relays
You can only assign one function to each relay.
Operating principle of the relays
The relays are changeover contacts. They can be used as either a break contact or a NO
contact.
All relay functions are designed as NO contacts, which means the contact closes if the
relay is activated by selecting the function.
The "Alm" (alarm) relay function is an exception to this. In this case the relay is designed as
a break contact. Normally the relay is active and the contact is open. Once an error occurs
the relay deactivates and the contact closes and switches on a warning light, for example.
Relay when a fault occurs
In case of a fault, the relays go into the safe mode, that means they deactivate.
