Electrical Connections - SSD Drives EX4 Notice D'instruction

EX4

3.5 Electrical connections

Check that the power to the electrical cabinet is off prior to making any connections. This wiring must
comply with the servoamplifier commissioning manual; cables should be selected from the range
offered by our company, or have equivalent characteristics.
When selecting cables, make sure that the cross-section is adequate so that voltage drops are
avoided.It might be necessary to fit a filter at the servoamplifier output if the length of the cable
exceeds 25 m; consult us.
Installers use any wiring other than that shown in the diagrams in appendix 2 at their own risk,
SSD Parvex SAS cannot be held responsible for unauthorized wiring.
Make sure that the characteristics of the contactors shown in these diagrams are strictly
followed according to the drive current.
CAUTION: Under no circumstances is the drive associated with the motor to be in the
explosive area!
3.5.1 Thermal protection safety
The drive guarantees a 1
independent relay system described in the connection diagram which constitutes an independent
protection circuit meeting safety classification SIL2 in accordance with the standard IEC 61508.
Two safety types are used:
Thermoswitches (2 in number) fitted in the servomotor coil mean that the circuit is mechanically
opened on a temporary basis at 125°C±5°C.
A thermofuse fitted with a contact on the servomotor frame means that the circuit is mechanically
opened on a permanent basis at 130°C-5°C.
Both thermoswitches and thermofuse are wired in-series with the coil of the drive power contactor. If
the maximum temperature is reached, the thermoswitches are opened and temporarily cut off the
power supply to the contactor coil. If the temperature reaches a dangerous level (thermoswitches
default), the thermofuse melts; permanently cutting off the power supply to the contactor coil.
Caution (see diagrams in appendix) :
Make sure the parameters of the contactor and the connecting are strictly followed.
The motor is out of order if the thermofuse is activated!
The power contactor KM1 should be replaced in accordance with its operation lifespan and
number of manoeuvres. A yearly test, intended to check on the ability of the contactor to detect
condition changes, should also be carried out.
3.5.2 Optional no-current holding brake
+
220Ω
½ W
220µF
63V
0.1µF
24V =
63V
-
st
level of safety but it is not sufficient. Safety is guaranteed by the
+
-
PVD 3566A – 12/2004
www.comoso.com
In the event that the servomotor is fitted with a
brake, check that the brake is working correctly
prior to starting up the motor.
The standard brake power supply is 24 Vcc DC
± 10%.
The holding brake is used to completely
immobilize the servomotor under load. It is not
designed to be used for repeated dynamic
braking; dynamic braking must only be used in
the case of an emergency stop.
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