18
CONNECTIONS
POWERDRIVE MD2CS Installation guide
4946 - 2017.12 / c
en
3 - CONNECTIONS
• All connections work must be performed by
qualified electricians in accordance with the laws in
force in the country in which the drive is installed. This
includes earthing to ensure that no directly accessible
part of the drive can be at the mains voltage or any other
voltage which may be dangerous.
• The drive must be supplied through an approved
circuit-breaking device so that it can be powered down
safely.
• The drive power supply must be protected against
overloads and short-circuits.
• Check that the voltage and current of the drive, the
motor and the mains supply are compatible.
• The voltages on the connections of the mains supply,
the motor, the braking resistor or the filter may cause
fatal electric shocks.
• Only one permanent magnet motor can be connected
to the drive output. It is recommended to install a circuit-
breaking device between the permanent magnet motor
and the drive output to eliminate the risk of hazardous
voltage feedback when performing maintenance work.
• See also the recommendations in section 7.
3.1 - Power connections
3.1.1 - Electronics and forced ventilation
power supply
The control electronics and forced ventilation units are
supplied through a single-phase transformer whose primary
is connected to terminals L1-L2 of the power supply.
The neutral of the electronics power supply must
not be connected to earth
• Electrical characteristics:
Voltage
Maximum power
Electronics
power
supply (EPS)
230 V
isolated
100 VA
Forced
ventilation
(FS)
230 V
connected
to earth
60T to 150T:
P = 300VA
180T to 270T:
P = 500 VA
340T to 570T:
P = 1200 VA
270TH to 500TH: P = 1200 VA
Recommended schematic :
EPS
FS
(1 to 4)
1.25A/250V SA
1.25A/250V SA
Fuse sizing in
accordance with
local rules
3.1.2 - Characteristics of connection terminals
Refs.
Functions/connections
Type of connection and tightening torque
60T to 150T
180T to 270T
340T to 570T
270TH to 500TH
L1, L2, L3
Mains power supply
M8 bolt - 12 Nm
M10 screw bolt - 20 Nm
U, V, W
Motor outputs
PE
Earth
M8 bolt - 12 Nm
M8 bolts - 12 Nm
P4, P5 (see §4.4)
EMC commoning link
Torx screws Ø20 - 4 Nm
-
Control block (1)
Spring terminal block
DC +, DC -
Optionnal braking
transistor
blot M10, 20Nm
DC +, BR
P14 (see §5.5)
14 points HE10 connector
SDR
Rectifier enable input
Connector
-
VF
Forced ventilations
Spring terminal block
Do not exceed the indicated maximum tightening torque.
(1) The neutral of the electronics power supply must not be connected to earth
