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11. OPTIONS AND PERIPHERAL EQUIPMENT
(e) Radio noise filter (FR-BIF)
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 Outline drawing (Unit: mm)
Make the connection wires as short as possible.
Grounding is always required.
Make sure to insulate the wires that are not used for wiring.
Radio noise
filter
Servo
amplifier
Power
supply
MC
MCCB
L2
L1
Terminal
block
29
44
4
2
7
4
5 hole
58
29
Approx.300
Leakage current: 4mA
RedWhite
Blue
Green
(f) Varistors for input power supply (Recommended)
Varistors are effective to prevent exogenous noise and lightning surge from entering the servo amplifier.
When using a varistor, connect it between each phase of the input power supply of the equipment. For
varistors, the TND20V-431K and TND20V-471K, manufactured by NIPPON CHEMI-CON, are
recommended. For detailed specification and usage of the varistors, refer to the manufacturer catalog.
Power
supply
voltage
Varistor
Maximum rating
Maximum
limit voltage
Static
capacity
(reference
value)
Varistor voltage rating
(range)
V1mA
Permissible circuit
voltage
Surge current
immunity
Energy
immunity
Rated
pulse
power
AC[Vrms] DC[V] 8/20 s[A] 2ms[J] [W] [A] [V] [pF] [V]
100V
class
200V
class
TND20V-431K 275 350
10000/1 time
7000/2 time
195
1.0 100
710 1300 430(387 to 473)
TND20V-471K 300 385 215 775 1200 470(423 to 517)
[Unit: mm]
W
d
E
H
D
L
T
Model
D
Max.
H
Max.
T
Max.
E
1.0
(Note)L
min.
d
0.05
W
1.0
TND20V-431K
21.5 24.5
6.4 3.3
20 0.8 10.0
TND20V-471K
6.6 3.5
Note. For special purpose items for lead length (L), contact the manufacturer.
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