DC/AC Inverter
INV222 & INV211
User Manual
Page 11 (20)
©2014. ELTEK DEUTSCHLAND GmbH.
Eltek_UM_INV222_and_INV211_E_R2.0.doc
4.5 Module cooling
The unit is cooled by internal fan. The airflow is from the front to rear side. The fan is monitored and speed-
controlled dependent on module temperature. To provide sufficient air flow, a minimum space (see item “A” at
figure 7.) of 50 mm is required between the unit and the rear cabinet wall as well as an unobstructed supply of air.
Figure 7. Air flow direction
4.6 Communication interface
The inverter is equipped with a serial data interface in accordance with the Controller Area Network
(CAN) specification. The CAN-Bus connection is integrated in the rear side connector.
Several inverters in a system or parallel connection can be controlled and monitored through the CAN-Bus by a
central unit which is integrated in the static transfer switch unit STS.
The following parameters of a specific inverter unit can be controlled or monitored:
•
Inverter status (OK/failure)
•
Output voltage (measurement value)
•
Output current (TRMS measurement value)
•
Input voltage (measurement value)*
•
Input current (measurement value)*
•
Output frequency (measurement value)*
•
Internal temperature (measurement value)*
*with separate software tool