Advertisement
CHAPTER 3 - Installation of the drive
lf the final user wants to manufacture the complete cable himself, assembling connectors
plug parts on his own, it is necessary to follow these instructions:
a) the assembly must be carried out by specialized personnel;
b) only the cable indicated in paragraph 4.3.5 must be used;
c) only connectors plug parts that are supplied as an option of motor and convertor must be
used;
d) it is necessary to fulfill the prescriptions mentioned in paragraph 3.3 "Guidelines on the
application of electromagnetic compatibility";
e) the cable must not be interrupted for any reason between the connector on the "motor &
sensors" and the connector on the convertor: no intermediate terminal boards and/or
connectors are allowed;
f) the maximum length of the cable must not exceed 30 m.
When, for special reasons, it is necessary to use a type of cable which is not approved, the
Customer Service must be contacted in advance (see paragraph 1.6.4).
CAUTION
Resolver connections are extremely importantl A bad operation of this part
of the circuit can provoke serious problems to the operation of the entire drive.
3.2.2.3 (Possible) connection to the thermal switch
The motor is equipped with a thermal switch, normally closed, which opens in case of motor
overtemperature (terminal I and J -thermal- of Fig. 3-5 and Fig, 3-6). Terminal Z (Fig. 3-6)
must not be connected.
This switch is not normally used in connection with the convertor (see paragraph 4.3.5). It
can be used, for example, in special cases, as signaling in possible circuits of plant
supervision, connected to a system PLC. The contact can work at 220 Vac, with a current up
to 5 A.
3.2.2.4 Brake connections (only if this option exists)
When the brake option is present, connections must be made according to the following
instructions.
WARNING: The management of the brake is completely care of and under the
responsibility of the manufacturer of the electric cabin. The brake installed is an
emergency brake, therefore it works (i.e. it brakes) when it is not supplied.
Therefore it is absolutely necessary that the motor is free (not locked) before
being supplied, so the logic of the electric cabin must be able to supply the
brake when and where it is suitable, furthermore checking that, during
operation of the servomotor, the brake is always supplied.
All electrical and mechanical data related to brakes can be found in the Catalogue, for the
various sizes of servomotors. In this respect, please note:
a) the supply of the brake is in continuous current, coming from a power supply (which is not
a part of the supply of the drive) of an adequate power and with tolerances of voltages
specified in the Catalogue;
b) the power supply of the brake must come from a circuit insulated from the net;
c) the connections of the supply circuit must fulfill what indicated in paragraph 3.3;
d) the polarity of supply must be respected absolutely (positive pole on terminal D and
negative on terminal E): inversion of polarity equals lack of supply, therefore the motor is
stopped.
MANIU04.9607 GB 03/97
Page 3.9
Advertisement
