Multifunction Relay 1 And 2 - SMA SUNNY ISLAND 4548-US Operating Manual

6 Electrical Connection

6.4.6 Multifunction Relay 1 and 2

The Sunny Island offers you several options for the control of internal and external processes. Two
multi-function relays are integrated into the Sunny Island to which you can assign functions using the
parameters "241.01 Rly1Op" and "241.02 Rly2Op" (see Section 15 "Relays", page 140).
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 break contact (NCC) or as make
contact (NOC).
You can only assign one function to each relay!
Connection to the Relay Contact
Danger to life from electric shock due to incorrect insulation
• Securely disconnect the insulated conductors leading to the relay contact from the
communication area and the AC area.
• Strip off the insulation of the conductor leading to the relay contact.
• Sheathe the silicon tube included in the delivery via the insulated conductors used in the relay
contacts.
• Never operate the Sunny Island without silicone tube.
1. Pierce a hole at a suitable location in the cable support sleeve using a sharp object.
2. Starting from the outside, lead the insulated conductors with bootlace ferrules through the hole
in the Sunny Island.
3. Cut an appropriate piece from the silicone tube (included in scope of delivery) and pull it over
the insulated conductors.
58 SI4548-6048-US-BE-en-21
SMA Solar Technology America LLC
Operating Manual