Mitsubishi Electric MELSERVO-J3 Series Manual page 464

14. OPTIONS AND AUXILIARY EQUIPMENT
(d) Line noise filter (FR-BSF01, FR-BLF)
This filter is effective in suppressing noises radiated from the power supply side and output side of the
servo amplifier and also in suppressing high-frequency leakage current (zero-phase current) especially
within 0.5MHz to 5MHz band.
Connection diagram
Use the line noise filters for wires of the main power supply
(L L L ) and of the motor power supply (U V W). Pass
1 2 3
each of the 3-phase wires through the line noise filter an equal
number of times in the same direction. For the main power supply,
the effect of the filter rises as the number of passes increases, but
generally four passes would be appropriate. For the motor power
supply, passes must be four times or less. Do not pass the
grounding (earth) wire through the filter, or the effect of the filter
will drop. Wind the wires by passing through the filter to satisfy the
required number of passes as shown in Example 1. If the wires
are too thick to wind, use two or more filters to have the required
number of passes as shown in Example 2. Place the line noise
filters as close to the servo amplifier as possible for their best
performance.
Example 1
NFB
Power
supply
Line noise
filter
(Number of turns: 4)
Example 2
MC
NFB
Power
supply
Line noise
filter
Two filters are used
(Total number of turns: 4)
(e) Radio noise filter (FR-BIF-(H))
This filter is effective in suppressing noises radiated from the power supply side of the servo amplifier
especially in 10MHz and lower radio frequency bands. The FR-BIF-(H) is designed for the input only.
Connection diagram
Make the connection cables as short as possible.
Grounding is always required.
When using the FR-BIF with a single-phase power supply, always
insulate the wires that are not used for wiring.
NFB
Power
supply
200V class: FR-BIF
400V class: FR-BIF-H
MC
Servo amplifier
L
1
L
2
L
3
Servo amplifier
L
1
L
2
L
3
Servo amplifier
MC
L
1
L
2
L
3
Radio noise
filter FR-BIF-
(H)
Outline drawing [Unit: mm]
FR-BSF01 (for wire size 3.5mm
FR-BLF(for wire size 5.5mm
Outline drawing (Unit: mm)
Red White Blue
29
58
14 - 79
2
(AWG12) or less)
Approx.110
2- 5
95 0.5
Approx.65
33
2
(AWG10) or more)
7
130
85
160
180
Leakage current: 4mA
Green
hole
29
44
5
7