51
Procedure
For detailed connection description of the Smart Energy Meter cable, refer to the section
. Plug the wires into the
Meter
terminal according the labels on
the bottom of the inverter.
5.8.5 Dry Contact Connection
Dry contact cables require a cross section of 1 mm
2
to 1.5 mm
2
.
The connection procedure of the dry contact is the same as that of the RS485
terminal block.
5.8.5.1 Dry Contact Function
Connection method of the dry contacts is similar to that of the RS485 terminal block.
DI terminal (emergency stop dry contact):
the dry contact can be configured to be an
emergency stop contact.
When the DI contact and PGND 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.
NS terminal:
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 PGND contact are
shorted by external controlled switch, and the inverters will emergently stop when DI contact
and PGND contact are disconnected.
The dry contacts only support passive switch signal input.
When wiring DI dry contacts, ensure that the maximum wiring distance meet the
requirements in
10.2 Wring Distance of DI Dry Contact
DO terminal (fault output dry contact):
The relay can be set to output fault alarms, and
user can configure it to be a normally open contact (COM
&
NO).
Use LED indicators or other equipment to indicate whether the inverter is in the faulty state.
Devices connected to the relay should comply with related requirements:
AC-Side Requirements
DC-Side Requirements
Max. voltage: 250 Vac
Max. current: 5A
Max. voltage: 30Vdc
Max. current: 5A
User Manual
Summary of Contents for SG25CX-P2
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