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20 Operation principle and hardware description
Fiber optic connectors
BSFC
V50←
V60→
BCU
V10←
V20→
Cooling system
See chapter
Internal cooling circuit (page
AC IN
X50
Auxiliary voltage inputs for internal power supply (BDPS)
24V OUT
X53
24 V DC output (for eg. BCU control unit)
STO IN
X52
STO signals from BCU control unit
STO OUT
X51
STO signal forwarding output to next inverter module (if
present)
Auxiliary voltage: 230 V AC
Auxiliary voltage: 115 V AC
Name
Description
BSFC
Reserved.
BCU
Control unit connection. Must be connec-
ted by the installer.
99).
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