Electrical Connection
SMA Solar Technology AG
44
SI5048-TEN093630
Technical Description
6.4.4 Multi-function Relays 1 and 2
The Sunny Island offers you several options for the control of internal and external processes.
For this purpose, two multi-function relays are integrated into the Sunny Island to which you can assign
functions via the using the "241.01 Rly1Op" and "241.02 Rly2Op" parameters (see chapter
15 ”Relays” (page 123)).
We recommend connecting the load shedding and generator request functions to the master, since,
if a failure occurs, the slave may be waiting for a confirmation, but the master continues to operate
and the device can at least operate in a limited capacity.
Operating principles of the relays
The relays are changeover contacts; they can be used as normally closed contacts (NCC)
or as normally open contacts (NOC).
You can only assign one function to each relay!
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