SMA SC 400HE - Manual (Page 74)

6 External Grid Monitoring Relay SMA Solar Technology AG
74 SC4-63HE-BE-BEN103280 Operating Manual
Relay Function
Interface
A configuration interface is available for configuring the relay using a PC. A special interface cable
(DPC) and software are required for this purpose. For more detailed information, read the relay
manual. It accompanies the Sunny Central on CD or you can find it on the Internet at
www.woodward.com.
Function of relays 1, 2 and 3 A/R
The individual relays can be configured either as
A = open-circuit current (normally open) or R = standby
current (normally closed).
A = the relay is configured as open-circuit current
contact (normally open). The relay energizes only if the
allocated protective function trips.
R = the relay is configured as standby current contact
(normally closed). The relay is always energized and
opens only if the allocated protective function trips.
INFORMATION: Relay 1 is configured to R (normally
closed) and cannot be altered.