Fronius 250/30 DCD DF Operating Instructions Manual page 60

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Terminals with fuse holders for DC 'IN' cables
Single-wire cable cross section 2.5 - 25 mm²
Multi-strand cable cross section 2.0 - 16 mm²
Measuring channel 1
Measuring channel 2
Measuring channel 3
Measuring channel 4
Measuring channel 5
DIN rail for fitting optional AC power pack
DC circuit breaker
DIN rail for fitting a standard overvoltage protection device
RJ 45 connections for data communication cables
Terminals for data communication cables
Max. cable cross-section 2.5 mm²