Omron R88M-K - Page 299

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4-53

4 System Design

G5-series AC Servomotors and Servo Drives User’s Manual (with Built-in EtherCAT Communications)

4-3 Wiring Conforming to EMC Directives

4-3-2 Selecting Connection Component

Positioning can be affected and I/O signal errors can occur if control I/O is influenced by noise.

• Use completely separate power supplies for the control I/O power supply (especially 24 VDC) and the

external operation power supply. In particular, do not connect the 2 power supply ground wires.

• Install a noise filter on the primary side of the control I/O power supply.

•

If motors with brakes are being used, do not use the same 24-VDC power supply for both the brakes and the control

I/O. Additionally, do not connect the ground wires. Connecting the ground wires may cause I/O signal errors.

• If the control I/O power supply wiring is long, noise resistance can be improved by adding 1-µF

laminated ceramic capacitors between the control I/O power supply and ground at the drive input

section or the controller output section.

z Harmonic Current Measures

• Use a Reactor to suppress harmonic currents. The Reactor functions to suppress sudden and

quick changes in electric currents.

• The Guidelines for Suppressing Harmonic Currents in Home Appliances and General Purpose

Components requires that manufacturers take appropriate remedies to suppress harmonic

current emissions onto power supply lines.

• Select the proper Reactor model according to the Servo Drive to be used.

Improving Control I/O Signal Noise Resistance

Reactor to Reduce Harmonic Current

Servo Drive Reactor

Model

Number of

power

phases

Model

Rated

current

Inductance Weight

R88D-KA5L- Single-phase 3G3AX-DL2002 1.6 A 21.4 mH Approx. 0.8 kg

R88D-K01L- 3G3AX-DL2004 3.2 A 10.7 mH Approx. 1.0 kg

R88D-K02L- 3G3AX-DL2007 6.1 A 6.75 mH Approx. 1.3 kg

R88D-K04L- 3G3AX-DL2015 9.3 A 3.51 mH Approx. 1.6 kg

R88D-K01H- Single-phase 3G3AX-DL2002 1.6 A 21.4 mH Approx. 0.8 kg