Mitsubishi Electric MR-J2S-A Instruction Manual page 284

13. OPTIONS AND AUXILIARY EQUIPMENT
(d) Line noise filter (FR-BLF, FR-BSF01)
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 MC
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)...for the input side only
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 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 wire,
always insulate the wires that are not used for wiring.
NFB MC
Power
supply
Radio noise
filter FR-BIF
Servo amplifier
L
1
L
2
L
3
Servo amplifier
L
1
L
2
L
3
Servo amplifier
L
1
L
2
L
3
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Outline drawing [Unit: mm] ([Unit: in.])
FR-BSF01 (for MR-J2S-200A or less)
Approx.110(4.33)
95 0.5(3.74 0.02)
Approx.65 (2.56)
33(1.30)
FR-BLF (MR-J2S-350A or more)
7(0.28)
130(5.12)
85(3.35)
160(6.30)
180(7.09)
Outline drawing (Unit: mm) ([Unit: in.])
Leakage current: 4mA
Red White Blue Green
29 (1.14)
58 (2.28)
2- 5(0.20)
5 (0.20)
hole
29 (1.14)
7 (0.28)
44 (1.73)