6 Electrical Connection
SMA Solar Technology AG
Operating manual
51
SI44M-80H-13-BE-en-15
6.5.14 Connecting Message Devices for Operating States and Warning Messages
You can connect message devices to the multifunction relays to allow operating states and warning messages from the
Sunny Island inverter to be output. 1 of the following operating states and warning messages can be displayed for
each multifunction relay:
• The generator is running and connected.
• Voltage and frequency of the utility grid are within the range for connection.
• A Sunny Island displays an error message of level 2 or higher. Only the error messages within a cluster are
evaluated here. A different control logic of level 2 ensures that the error message will also be displayed in the
case of automatic shutdown:
– When an error message of level 2 is pending, the multifunction relay is deactivated.
– When no error message is pending, the multifunction relay is activated.
• A Sunny Island displays a warning. Only the warnings within a cluster are evaluated here.
• The Sunny Island is in operation in a single system.
• The respective cluster is in operation in a cluster system.
• The Sunny Island is in derating in a single system.
• The respective cluster is in derating in a cluster system.
Table with settings for multifunction relays:
Value
Version
Relay is activated when the generator is run-
ning
The generator is running and connected.
Relay is activated when an external source is
available
Voltage and frequency of the generator are within the range for con-
nection.
Relay is activated when the utility grid is
available
The utility grid is connected in the off-grid system.
Relay is deactivated in the event of an error
A Sunny Island displays an error message of level 2 or higher.
Relay is activated in the event of a warning
A Sunny Island displays a warning.
Relay is activated when the cluster is running
In a single system, the Sunny Island is operating, or in a cluster sys-
tem, the cluster is operating.
Relay is activated in the event of power limi-
tation
In a single system, a Sunny Island is in derating, or in a cluster sys-
tem, the cluster is in derating.
Requirements:
☐ The technical requirements of the multifunction relay must be met (see Section 16, page 175).
Cable requirements:
☐ Conductor type: copper wire
☐ Conductor cross-section: 0.2 mm² to 2.5 mm²