User Manual Of EL7-EC** AC Servo
23
X1 Main power supply
Table 2-2 X1 port descriptions
Port
Pin
Functions
Remarks
X1
L1
Single phase 220VAC
,
+10
~
-15%
,
50/60Hz
①
Optional isolation transformer
②
Do not connect to 380VAC directly to prevent
damage to driver.
③
In case of serious interference, it is
recommended to connect a line filter to main
power supply;
It is recommended to install a fuseless circuit
breaker to cut off power supply in time when the
driver fails
.
L2
P +
①
Internal DC bus
positive terminal
②
External
regenerative
resistor P terminal
Please refer to 2.4.1 Regenerative resistor
selection and connections
Br
External regenerative
resistor terminal
N
Please do not connect
U
Motor U terminal
Please ensure proper wire connection on motor.
V
Motor V terminal
W
Motor W terminal
PE
Motor Protective Earth Please ground PE of driver and motor together
2.4.1 Regenerative resistor selection and connections
The use of regenerative resistor
When the motor opposes the direction of rotation as in deceleration or vertical axis
escalation, part of the regenerative energy will be delivered back to the driver. This
energy will first be stored in internal capacitors of the driver. When the energy stored in
the capacitors reach the maximum capacity, a regenerative resistor is required the
excessive energy to prevent over-voltage.