4   Configuration and Wiring
4 - 66
AC Servomotors/Servo Drives 1S-series with Built-in EtherCAT® Communications User’s Manual (I586)
• Use a surge absorber to absorb the lightning surge voltage and the abnormal voltage from the power
input line.
• The following table gives the recommended surge absorber specifications.
 
Note 1. Refer to the catalogs from the manufacturer for how to use.
2. The surge current tolerance is the value for the standard impulse current of 8/20 μs. For a greater pulse 
width, reduce the current or change the surge absorber to the one with a higher capacity.
3. Select a CSA-certified product when you use a surge absorber.
 External Dimensions
 Equivalent Circuit
Surge Absorber
Servo Drive voltage Surge current tolerance
Recommended 
manufacturer
Recommended model
Single-phase 100 VAC 410 V±20%, 2500 A Soshin Electric Co., Ltd. LT-C12G801WS
Single-phase 200 VAC 410 V±20%, 2500 A Soshin Electric Co., Ltd. LT-C12G801WS
3-phase 200 VAC 410 V±20%, 2500 A Soshin Electric Co., Ltd. LT-C32G801WS
3-phase 400 VAC 800 V±20%, 2500 A Soshin Electric Co., Ltd. LT-C35G102WS
22.5
19
Separator 
operation indicator
Lead wire (L3) Lead wire (L1)
Ground wire
4.3 dia.
Case
28 250
38
4
33.5
25
4
For single-phase
22.5
19
Separator 
operation indicator
Lead wire (L3)
Lead wire (L1)
Ground wire
4.3 dia.
Case
28 250
38
4
33.5
25
4
Lead wire (L2)
For 3-phase
Thermal fuse 
ZnO element 
Discharging gap
For single-phase
Thermal fuse 
ZnO element 
Discharging gap 
For 3-phase