Siemens 1FT5 02 Serie Manuel D'instructions page 12

(H = balanced with special-design half featherkey)
The balancing code is indicated only if a keyway is provided in the shaft
end. When fitting drive components, check for matching rotor balance
specifications!
Special design
(balanced with half featherkey)
In the case of drive components with a ratio of hub length l to shaft-end
length l of < 0.8 and speeds > 1500 rpm, the motor may run with an
M
unbalance (see Fig. 6.2).
It may be necessary to re-balance the unit, for example by removing that
part of the featherkey, T , which extends beyond the drive component and
P
stands proud of the shaft.
The general safety precautions regarding prevention of contact
with the drive components. If a motor is put into operation without
a drive component attached, the featherkey
must be secured so it is not thrown out of its
slot.
The permissible transverse and axial forces are specified in the diagrams
included in the description of the "SIMODRIVE 1FT5" (if necessary, ask
your local supplier or the manufacturer).
If axial forces act towards the motor, the drive component must rest
against the shoulder of the shaft. If necessary, fit a spacer bush!
There must be no axial forces acting on motors with an integral
brake!
2.4 Electrical connections
The system must be disconnected from the power supply before
any work is carried out!
Due to the fact that the motors contain perma-
nent magnets, a voltage is generated at the
motor terminals when the rotor is turned.
The motor must be connected up as shown in the diagram supplied. For
standard motors, the connections are as shown in Fig. 2.
Basic rules for connecting motors:
- The connecting leads should be suitable for the type of use, as well as
the voltages and amperages concerned.
- The connecting leads should be of sufficient length, and should be
secured against twisting, tensional stress and kinking.
- The protective earth must be connected to the terminal marked
When using a plug connector, make sure that
- the male connector engages properly in the keying slot, and that
- the connector union nut is hand-tight to ensure proper electrical contact
and that the connection is properly sealed.
2.4.1 Power connections
The power is connected via a plug.
Direct connection to the three-phase AC supply is not allowed and
will lead to the destruction of the motor.
Check for correct phase sequence!
The motor may only be operated from a properly
matched pulse-width-modulation inverter.
2.4.2 Encoder and PTC thermistor connections
The encoder system and the PTC thermistor are connected via the signal
connector. Take note of the specifications on the rating plate and the
circuit diagram. The PTC thermistor installed in the overhang only works
as a motor trip in combination with the corresponding tripping unit (e.g.
3UN... ).
2.4.3 Brake connections
The brake is connected via a plug connector. The fail-safe permanent-
6
ENGLISH
magnet holding brake operates according to the closed-circuit principle.
It is released when a current of 24 V DC ± 10% from the two-pulse bridge
connection is applied. The voltage must be between the specified
tolerance limits, otherwise reliable operation may be at risk. When the
motor is switched on, the brake must always be energized, i.e. released.
When the brake is switched off (de-energized), or if there is a power
failure, the brake hub is pulled towards the magnet, thus preventing the
motor shaft from moving.
NOTE: In the event of a power failure, the motors can be decelerated by
means of rheostatic short-circuit braking. In this case, the short-circuit
current must be connected across the R
"SIMODRIVE 1FT5".
2.5 Commissioning
Before putting the motor into operation, check that
- the rotor can be turned without touching the stator (release brake if
necessary);
- the motor is properly fixed and aligned;
- the drive components are correctly adjusted (e.g. belt tension on belt
drive, etc.);
- all electrical connections and connectors match the specifications and
are properly tightened;
- the protective earth is properly connected;
- all attachments (e.g. brake, etc.) are operational;
appropriate measures have been taken to prevent contact with live parts;
- the maximum speed, if specified (see rating plate), cannot be exceeded.
After installing the motor, check that the brake (if fitted) works
properly! The brake is only designed to carry out a limited number
of emergency braking operations. It must not be used as a regular
service brake.
Adjustments
If the rotor needs to be turned while the motor is switched off, the brake
must be energized (24 V DC ± 10%, check for correct polarity!), i.e. the
brake must be released.
Facility for attaching encoder
(e.g. ROD 426, absolute value encoder)
If no encoder is to be attached, the coupling for the encoder (e.g. B.
8.52, Fig. 3) must be removed before operating the motor.
The cover cap on the pulse generator centring hole in the flange (8.53-
Fig.á 3) is for transport purposes only - degree of protection IP50. The
.
3 Maintenance
Safety precautions
Before carrying out any work on the motor or unit, and
especially before uncovering live parts, disconnect the motor
from the power supply. Remember to disconnect any
supplementary or auxiliary circuits as well as the main circuits.
The standard "5 safety rules" according to DIN VDE 0105
- Check that equipment is dead
- Earth and short-circuit
- Cover or screen off all live adjacent parts
The above actions may only be reversed when all repair work
has been completed and the motor has been completely re-
assembled.
The system must be disconnected from the power supply before
any work is carried out! Due to the fact that the motors contain
permanent magnets, a voltage is generated at the motor terminals
when the motor is turned.
resistors, see description of
opt
This list may be incomplete. Other checks
may also be necessary.
degree of protection of the motor indicated on the
rating plate applies only with the encoder attached.
apply:
- Disconnect from the power supply
- Secure against reconnection