11. OPTIONS AND PERIPHERAL EQUIPMENT
(f) Varistor 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, TND20V-471K and TND20V-102K, manufactured by
NIPPON CHEMI-CON, are recommended. For detailed specification and usage of the varistors,
refer to the manufacturer catalog.
Power
supply
Varistor
voltage
AC [Vrms] DC [V]
200 V
TND20V-431K
class/
100 V
TND20V-471K
class
400 V
TND20V-102K
class
D
W
E
φd
Maximum rating
Surge
Permissible circuit
current
voltage
immunity
8/20 µs [A]
10000/1
275
350
times
7000/2
300
385
times
7500/1
time
625
825
6500/2
times
T
Model
TND20V-431K
TND20V-471K
TND20V-102K
Note. For special purpose items for lead length (L), contact the manufacturer.
Maximum
voltage
Energy
Rated pulse
immunity
power
[A]
2 ms [J]
[W]
195
1.0
100
215
400
1.0
100 1650
D
H
Max.
Max.
Max.
6.4
21.5
24.5
6.6
22.5
25.5
9.5
11 - 85
limit
Static
Varistor voltage rating
capacity
(range)
(reference
V1 mA
value)
[V]
[pF]
710
1300
430 (387 to 473)
775
1200
470 (423 to 517)
560
1000 (900 to 1100)
(Note)
T
E
φd
L
±1.0
±0.05
min.
3.3
20
0.8
3.5
6.4
20
0.8
[V]
[Unit: mm]
W
±1.0
10.0
10.0