Connecting Multiple Servo Amplifiers To One Emc Filter (1: N Connection); Selection Method - Mitsubishi Electric MELSERVO EMC Installation Manuallines

6. SUPPLEMENT

6.4 Connecting multiple servo amplifiers to one EMC filter (1: n connection)

Confirm the EMC standard compliance of the entire machine or equipment on customer side.

6.4.1 Selection method

Molded-
case
Power
circuit
supply
breaker
When multiple servo amplifiers are connected to one EMC filter with the total length of servo motor power
cables too long, the magnetized parts of the EMC filter become magnetically saturated and the noise
attenuation properties may be lower than expected.
To gain the desired noise attenuation properties with every servo amplifier, select the EMC filter that satisfies
the following formulas (6.1 to 6.3) and conditions in Table 6.1.
EMC filter rated input voltage [V] ≥ Servo amplifier rated input voltage [V] ············································ (6.1)
EMC filter rated input current [A] ≥ Total rated input current of each servo amplifier [A] ··························· (6.2)
Total length of servo motor power cables supported by the EMC filter [m] ≥
Total length of servo
motor power cable [m]
100 or less
200 or less
250 or less
250 or less
Note. Install the surge protector on the primary side of the EMC filter.
Molded-
case
EMC filter
circuit
breaker
Molded-
case
circuit
breaker
Molded-
case
circuit
breaker
Fig. 6.7 Connecting multiple servo amplifiers to one EMC filter
Total length of servo motor power cables [m] ··································· (6.3)
Table 6.1 EMC filter selection
EMC filter
(Soshin Electric) (Note) Rated input current [A]
HF3030C-SZL
HF3060C-SZL
HF3100C-SZL
HF3150C-SZL
Servo amplifier
Magnetic Main circuit
contactor power supply
Control circuit
power supply
Servo amplifier
Magnetic Main circuit
contactor power supply
Control circuit
power supply
Servo amplifier
Magnetic Main circuit
contactor power supply
Control circuit
power supply
Rated input voltage [V]
30
60
100
150
6 - 4
(First)
Servo motor power
cable length
(Second)
Servo motor power
cable length
(nth)
Servo motor power
cable length
Leakage current [mA]
500
500
500
500
Servo
motor
Servo
motor
Servo
motor
7
7
7
7