SMA Sunny Island 5048 - Multi-Function Relay 1 and 2

SMA Solar Technology AG Electrical Connection
Technical Description SI5048-TB-TEN110340 45
6.4.4 Multi-function Relay 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 using the "241.01 Rly1Op" and "241.02 Rly2Op" parameters (see section 15”Relays”
(page130)).
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.
Generator request function during Multicluster operation
The generator request function during Multicluster operation only functions on the main
cluster.
Operating principles of the relays
The relays are changeover contacts; they can be used as break contact (NCC) or as make
contact (NOC).
You can only assign one function to each relay!