Omron R88D-KN01L-ECT-L User Manual page 178

Ac servomotors/servo drives g5-series with built-in ethercat communications linear motor type r88l-ec series; r88d-kn*-ect-l series

Table of Contents

4 System Design

Surge Suppressors

• Install surge suppressors for loads that have induction coils, such as relays, solenoids, brakes,

clutches, etc.

The following table shows the types of surge suppressors and recommended products.

Diodes are used for relatively small loads such

as relays when the reset time is not a critical

At power shutoff the surge voltage is the

lowest, but the reset time takes longer.

Used for 24/48-VDC systems.

Thyristors and varistors are used for loads

and varistors

when induction coils are large, as in

electromagnetic brakes, solenoids, etc., and

when reset time is critical.

The surge voltage at power shutoff is

approximately 1.5 times the varistor voltage.

The capacitor plus resistor combination is used

to absorb vibration in the surge at power supply

shutoff. The reset time can be shortened by

selecting the appropriate capacitance and

Additional Information

Thyristors and varistors are made by the following manufacturers.

Refer to manufacturer's documentation for details on these components.

• Thyristors: SEMITEC Corporation

• Varistors: SEMITEC Corporation, Panasonic Corporation

• Select contactors based on the circuit's inrush current and the maximum momentary phase current.

• The drive inrush current is covered in the preceding explanation of no-fuse breaker selection.

And the maximum momentary phase current is approximately twice the rated current.

G5-series Linear Motors/Servo Drives With Built-in EtherCAT Communications

Table of Contents

Troubleshooting