Maxsine EP3 AC Series, User Manual

Page: 21 / 246

2.1 System construction and wiring
11
2.1.2 Wiring explanations
Wiring Notes:

According to electric wire specification, use the wiring materials.
 The control cable length should be less than 3 meters and the encoder cable length 20 meters.
 EP3-GL series: check that the power supply and wiring of L1, L2, L3 and L1C, L2C
terminals are correct. Please do not connect to 380V power supply.
 EP3-GH series: check that the power supply and wiring of L1, L2, L3 and 0V, 24V
terminals are correct.
 The output terminals(U,V,W) must be connected with the servo motor connections(U,V,W)
correspondently, otherwise the servo motor will stop or over speed. However, by exchanging
three-phase terminal cannot cause the motor to reverse; this point is different from an
asynchronous motor.

Earthed wiring must be reliable with a single-point connection.
 Pay attention to the correct direction of freewheel diode which is connected with the relay at
the output terminal, otherwise can cause the output circuit breakdown.
 In order to protect the servo driver from noise interference that can cause malfunction, please
use an insulation transformer and noise filter on the power lines.

Wiring the power lines (power supply line, main circuit lines, etc.) at a distance above 30cm
from the control signal wires, do not lay them in one conduit.
 Install a non-fuse circuit breaker that can shut off the external power supply immediately for
in case of the servo driver fault.
2.1.3 Electric wire specifications
Connect terminal symbol Wire specification
Main power supply L1
、
L2
、
L3 1.5
～
4mm
2
Control
power
supply EP3-GL series L1C
、
L2C 0.75
～
1.0mm
2
EP3-GH series 24V
、
0V 0.75
～
1.0mm
2
Servomotor U
、
V
、
W 1.5
～
4mm
2
Ground 1.5
～
4mm
2
Control signals X1 ≥ 0.14mm
2
(AWG26), shielded
Encoder signals X2 ≥ 0.14mm
2
(AWG26), shielded
communication X3 ≥ 0.14mm
2
(AWG26), shielded
brake resistor P
、
B1/P
、
B 1.5
～
4mm
2
Must use a twisted pair wire cable for the encoder signal wiring. If the encoder signal cable
is too long (>20m), in which the encoder power supply can be insufficient, may use multi-wire or
thick wire for the power supply wiring.