SMA America, LLC
Electrical Connection
Technical Description
SI5048U-TUS121440
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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 136)).
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.
Connection to the Relay Contact
1. Pierce the appropriate place on the cable insert with a pointed object.
2. Starting from the outside, feed the cables with wire-end sleeves through the hole in the Sunny
Island.
3. Cut an appropriate piece from the silicone tube (included in the delivery) and pull it over the
wires.
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!
WARNING
Danger to life from electric shock due to incorrect insulation.
• Securely disconnect the relay cable from the communication area and the AC area.
• Strip the insulated conductors of the relay cable.
• Sheathe all relay cables installed using the silicone tube provided.
• Do not operate the device without the silicone tube.
