Yaskawa YASNAC PC NC Maintenance Manual Uživatelský manuál stáhnout pdf (Strana 147)

PC NC Maintenance Manual The VS-626M5

4-126

Figure 4.16: Input Method Selection

4. Precautions on Wiring Power Lines and Control Signal Lines

For proper wiring between devices, pay attention to the following points in

the design stage.

• Design the wiring route of the control signal lines (1, 2, 6CN) in

such a way that they are separated from the main circuit wiring

(R/L1, S/L2, T/L3) or other power lines.

If the power lines are provided with the signal lines (motor

encoder signal lines), a malfunction may be caused by the effect

of noise generated from the power lines.

• The length of the control signal lines (including the motor

encoder signal lines) must be less than 20m.

Excessively long motor encoder signal lines reduce the encoder

power supply voltage due to a voltage drop in the signal lines

which may cause the inverter to malfunction.

• When twisted shielded wires are used for control signal lines, ter-

minate them as shown in the figure below.

Figure 4.17: Shielded Wire Termination

Signal Name

Pin Number

1CN 6CN

EXTCOM 31 19, 20, 21

24VCOM 32 22, 23

0VCOM 33 24, 25

Shielded Sheath

Armor

To inverter shielded

sheath terminal

Insulate these parts

with insulating tape.

Never connect.

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Yaskawa YASNAC PC NC Maintenance Manual Uživatelský manuál Strana 147