Sungrow SG30CX User Manual page 57

User Manual
Devices connected to the relay should comply with related requirements:
A A C C - - S S i i d d e e R R e e q q u u i i r r e e m m e e n n t t s s
Max. voltage: 250 Vac
Max. current: 5A
D D I I t t e e r r m m i i n n a a l l ( ( e e m m e e r r g g e e n n c c y y s s t t o o p p d d r r y y c c o o n n t t a a c c t t ) ) : : the dry contact can be configured to be an
emergency stop contact.
When the DI contact and GND contact are shorted by external controlled switch (The
external switch can be configured as normally open contact or normally closed contact),
the inverter will immediately stop.
N N S S t t e e r r m m i i n n a a l l : : NS Protection is used for German market currently. For plant sized more
than 30kVA, inverter NS Protection terminals could be used in daisy chain to external NS
Protection Relay to realize emergency stop when NS Protection Relay change its dry
contact status due to the grid abnormal running status.
NS Protection (including Passive Valid) can be set. When NS Protection is enabled on
the iSolarCloud, the inverters will operate normally when DI contact and GND contact
are shorted by external controlled switch, and the inverters will emergently stop when DI
contact and GND contact are disconnected.
The dry contacts only support passive switch signal input.
The following figure shows the typical application of local stop dry contact.
f f i i g g u u r r e e 5 5 - - 7 7 Normal open contact
f f i i g g u u r r e e 5 5 - - 8 8 Normal close contact
D D C C - - S S i i d d e e R R e e q q u u i i r r e e m m e e n n t t s s
Max. voltage: 30Vdc
Max. current: 5A
5 Electrical Connection
47