46 Operation principle and hardware description
Bottom cable entry/exit (options +H350 and +H352)
For UL Listed (+C129) units, the default input and output cabling direction is through the
roof of the cabinet. The bottom entry (+H350) and bottom exit (+H352) options provide
power and control cable entries at the floor of the cabinet.
For non-UL Listed units, bottom entry/exit is the default cabling arrangement.
Top cable entry/exit (options +H351 and +H353)
For non-UL Listed units, 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.
For UL Listed (+C129) units, top entry/exit is the default cabling arrangement.
Cable conduit entry (option +H358)
The option provides US/UK conduit plates (plain 3 m steel plates without any ready-made
holes). US/UK conduit plates are provided as standard with options +C129 and +C134
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 0.08 to 4 mm
2
(28 to 12 AWG)
• stranded wire with ferrule 0.14 to 2.5 mm
2
(24 to 14 AWG)
• stranded wire without ferrule 0.08 to 2.5 mm
2
(28 to 12 AWG)
Stripping length: 10 mm (0.4 in).
Note: The optional modules inserted in the slots of the control unit (or optional FEA-03
extension adapter) are not wired to the additional terminal block. The customer must
connect the optional module control wires directly to the modules.
Thermal protection with PTC relays (options +L505, +2L505. +L513,
+2L513)
PTC thermistor relay options are used for the overtemperature supervision of motors
equipped with PTC sensors. When the motor temperature rises to the thermistor wake-up
level, the thermistor resistance increases sharply. The relay detects the change and
indicates motor overtemperature through its contacts.
+L505, +2L505, +L513, +2L513
Option +L505 provides a thermistor relay and a terminal block. The terminal block has
connections for the measuring circuit (one to three PTC sensors in series), the output
indication of the relay, and an optional external reset button. The relay can be reset either
locally or externally, or the reset circuit can be jumpered for automatic reset.
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