Dry Contact Connection; Dry Contact Function - Sungrow SG30CX User Manual

5 Electrical Connection

5.11 Dry Contact Connection

Dry contact cables require a cross section of 1 mm
The connection procedure of the dry contact is the same as that of the RS485
terminal block.

5.11.1 Dry Contact Function

The configuration circuit board is provided with fault output dry contact and emergency
stop dry contact, as shown in the figure below.
Connection method of the dry contacts is similar to that of the RS485 terminal block.
D D O O t t e e r r m m i i n n a a l l ( ( f f a a u u l l t t o o u u t t p p u u t t d d r r y y c c o o n n t t a a c c t t ) ) : : The relay can be set to output fault alarms,
and user can configure it to be a normally open contact (COM ＆ NO) or a normally
closed contact (COM＆NC).
The relay is initially at the NC terminal, and it will trip to another contact when a fault oc-
curs.When alarm occurs, signal status change will not be triggered.
Use LED indicators or other equipment to indicate whether the inverter is in the faulty
state. The following Figures show the typical applications of normal open contact and
normaliy closed contact:
46
2 to 1.5 mm 2 .
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