Manual Energy Storage Inverter ESI-S
Electrical design and installation 59
Inverter (auxiliaries)
connected to the supply,
error disappears
When open before,
closes when error
disappears
When closed before,
remains closed
When closed before, opens when error
disappears
When open before, remains open
shows an example of an alarm contact-cabling scheme using the NC alarm
contact. Using this scheme the bulb B will be on when the power supply to the inverter
is interrupted or the inverter trips due to an error. Otherwise the bulb will be off.
15
16
(a)
17
(a)
ESI-Manager
Alarm
outputs
NO
NC
230 Vac
external
power
supply
External bulb
alarm indicator
B
Remark:
(a)
Right hand terminal block when looking from rear, counting from top to
bottom
Figure 43: Alarm bulb cabling scheme using the NC alarm contact on the ESI-Manager
The voltage applied to the external digital input is high when:
−
the inverter is connected to the supply and is not in error AND
−
the external 24 Vdc power supply is in working order
15
(a)
16
(a)
17
Alarm
outputs
NO
NC
24 Vdc
external
supply
Remark:
(a)
Right hand terminal block when looking from rear, counting from top to
bottom
External
digital
input
+
-
+
-
ESI-Manager
Figure 44: Alarm cabling example using NO alarm contact and external digital input
2. A second method to implement alarm functionality is to use the ESI-Manager’s
programmable digital output contacts. Use this approach when the condition for
alarm is uniquely defined, e.g. an alarm has to be given only when the inverter trips
due to an unacceptably high network voltage or when the inverter trips due to a well-
