16
Precautions for Control Circuit Wiring
Take the following precautions when wiring.
1, 2, 3...
1. Separate the control signal line from power lines. Otherwise a
malfunction might occur.
2. For the frequency setting signal (analog), use a shielded lead
and be sure that the signal is terminated properly.
Armor
Never connect
Insulate these parts
with insulating tape
Connect shielded sheath
to main circuit grounding
terminal G (E).
Shielded
sheath
3. The wiring length of the control signal line must be 50 m or less.
4. To drive the contact input signal by transistor, use one having
ratings of 50 V 50 mA or more. Circuit leakage current at signal
OFF must be 100
µ
A or less.
5. To drive an inductive load (relay coil, etc.) by multifunction pho-
to-coupler output, be sure to insert a free wheel diode.
=
13.14
Free wheel diode
(100V, 100 mA or more)
48 V max.
50 mA max.
7
3G3XV
1-5
Operation
1-5-1 Checking Before Operation
Check the following items after completion of installation and wir-
ing:
•
No fault in wiring. Especially, the power supply is connected to the
output terminals T1 (U), T2 (V), and T3 (W).
•
No short-circuit because of wiring contamination (dust, oil, etc.).
•
Screws and terminals are not loosened. Wiring is provided prop-
erly.
•
Wiring is not grounded.
•
Load status is good.
For safe operation, before operation, the motor must be able to
operate alone by separating it from the coupling or belt which con-
nects the motor and machine.
When the motor is operated with the machine directly connected,
pay close attention.
Operation
Section 1-5
