￭ Molded case circuit breaker (MCCB, option +F289)
This option replaces the standard main switch with a molded case circuit breaker. The
breaker has inbuilt protection functions against overload and short-circuit. It is operated with
a direct rotary handle on the cabinet door.
For US market only.
￭ Cabinet heater with external supply (option +G300)
The option contains:
• 50 W heating elements in the cubicles where needed
• load switch for providing electrical isolation during service
• miniature circuit breaker for overcurrent protection
• terminal block for external power supply.
The heater prevents humidity condensation inside the cabinet when the drive is not running.
The power output of the semiconductor-type heating elements depends on the environmental
temperature. The customer must switch the heating off when it is not needed by cutting the
supply voltage off.
The customer must supply the heater from an external 110…240 V AC power source.
See also
•
Connecting external power supply wires for the cabinet heater (option +G300) (page 110)
•
Auxiliary circuit power consumption (page 213)
• circuit diagrams delivered with drive for the actual wiring.
￭ Top cable entry/exit (options +H351 and +H353)
The default input and output cabling direction is through the bottom of the cabinet. The top
entry (+H351) and top exit (+H353) options provide power and control cable entries at the
roof of the cabinet. The entries are equipped with grommets and 360° grounding hardware.
The options add an additional 125 mm (4.92 in) wide cable channel to the cabinet width.
￭ Cable conduit entry (option +H358)
The option provides US/UK conduit plates (plain 3 mm [0.12"] thick steel plates without any
ready-made holes). US/UK conduit plates are provided as standard with option +C129
instead of the normal cable entries.
￭ Additional terminal block X504 (option +L504)
The standard terminal blocks of the drive control unit are wired to the additional terminal
block at the factory for customer control wiring. The terminals are spring loaded.
Cables accepted by the terminals:
• solid wire 0.2 to 2.5 mm
2
(24 to 12 AWG)
• stranded wire with ferrule 0.25 to 2.5 mm
2
(24 to 12 AWG)
• stranded wire without ferrule 0.2 to 2.5 mm
2
(24 to 12 AWG).
Stripping length: 10 mm (0.5 in).
Note:
The option modules inserted in the slots of the control unit are not wired to the additional
terminal block. The customer must connect the option module control wires directly to the
modules.
46 Operation principle and hardware description
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