SIRIUS 3RR2 current monitoring relays
8.8 Operation
SIRIUS Innovations
726 System Manual, 01/2011, A8E56203870002-03
Changes to settings
Load current monitoring can be activated and deactivated using the arrow keys.
Relay switching behavior
Definition of switching behavior
The relay responds in accordance with the set switching behavior. There are two different
options:
● Closed-circuit principle (NC)
If the closed-circuit principle is selected, the relay picks up when the voltage is applied
(contact 31/34 closed). It drops out in the event of an error (contact 31/32 closed).
Similarly, if the supply voltage fails, the relay will fall back to this setting.
The semiconductor output responds as an NC contact.
● Open-circuit principle (NO)
If the open-circuit principle is selected, the relay only picks up in the event of an error
(contact 31/34 closed). Interruptions to the supply voltage are not displayed.
The semiconductor output responds as an NO contact.
Factory setting
The device is factory-set to the closed-circuit principle (NC).
Changes to settings
Press the arrow keys to switch the device from closed- to open-circuit principle and vice
versa.
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