Fronius String Control 100/12, Operating Instructions Manual, Page: 69 / 182

67
EN-US
Terminal assign-
ment for ground-
ed solar modules For grounded solar modules, only the ungrounded poles of the solar module strings may
be connected to the fuse-protected terminals (A).
Example of termi-
nal assignment
for grounded so-
lar modules
Assignment for solar module ground at the negative
pole Assignment for solar module ground at the positive
pole
Connecting Solar
Module Strings to
the Fronius String
Control 100/12
Negative solar module ground
DC- DC+
B (in) B‘ (out) A‘ (out) A (in)
Positive solar module ground
DC+ DC-
B (in) B‘ (out) A‘ (out) A (in)
-
+
(
B
) (
A
) (
B‘
) (
A‘
) (
B
) (
A
)
+
-
(
B‘
) (
A‘
)
(B)
(A)
1
(A)
(C)
2
(A) Tightening torque 2.0 Nm
(B) Tightening torque 1.5 Nm
(C) Tightening torque 2.0 Nm