Instruction manual

Points to check prior to starting operation Operation
MELSERVO J2-Super 4 - 1
4 Operation
4.1 Points to check prior to starting operation
Wiring
Before starting operation, check the following:
● A correct power supply is connected to the power input terminals (3-phase: L1, L2, L3,
1-phase: L11, L21) of the servo amplifier.
● The servo motor power supply terminals (U, V, W) of the servo amplifier match in phase
with the power input terminals (U, V, W) of the servo motor.
● The servo motor power supply terminals (U, V, W) of the servo amplifier are not shorted to
the power input terminals (L1, L2, L3) of the servo motor.
● Ground the servo amplifier and servo motor securely.
● When using a regenerative brake option or brake unit:
– always remove the lead across the terminals D and P for the servo amplifier MR-J2S-
350B or less and MR-J2S-200B4 or less.
– disconnect the cable connections to the internal brake resistor between the terminals P
and C for the servo amplifier MR-J2S-500B or more and MR-J2S-350B4 or more.
S001257C
Fig. 4-1: Wiring
S000582C
Fig. 4-2: Short circuit
MR-J2S- B 
M
U
U
V
V
W
W
L1
L2
L3
L11
L21
M
U
U
V
V
W
W
L1
L2
L3
L11
L21
MR-J2S- B MR-J2S- B4
M
U
U
V
V
W
W
L1
L2
L3
L11
L21
24 V DC
−
+
1-phase connector 3-phase connector3-phase connector
Servo amplifier 200V Servo amplifier 400VServo amplifier 200V
M
U
V
W
L1
L2
L3
Servo amplifier