Fronius String Control 250/25 DCD DF User Manual
Page 73
15
EN-US
4
5
3
2
1
6
25
6
25
4
5
3
2
1
1
2
3
4
5
6
25
25
1
2
3
4
5
6
+
-
- -
+
-
Recommended sequence for inserting and connecting DC cables
Notes for
Connecting
Solar Module
Strings to the
Fronius String
Control 250/25
DCD DF
(continued)
DC-
DC+
B (in)
B‘ (out)
A‘ (out)
A (in)
DC+
DC-
B (in)
B‘ (out)
A‘ (out)
A (in)
Terminal assi-
gnment for
grounded
solar modules
For grounded solar modules, only the ungrounded poles of the solar
module strings may be connected to the fuse-protected terminals (A).
Negative solar module ground
Positive solar module ground