CARLO GAVAZZI ISMG 315, User Manual

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There are two (2) terminals per PV string located inside the wiring box used for
the DC cable connections. Up to two (2) independent PV strings are supported by
the ISMG3 inverter. Therefore, there are four (4) terminals, two (2) of them are
labeled with “ + ” and other two (2) are labeled with “ - ”, in the wiring box for DC
cable connections as shown in Fig 2.3.2.2 and Fig 2.3.2.3. All the screws for the
cable connections shall be tightened with a torque of 3.5 Nm (35.5 lb-in).
Fig 2.3.2.2 PV Inverter Connections
Fig 2.3.2.3 PV Strings in Parallel