Precautions On Wiring - Sanyo SUPER BL P5 Manual

4. WIRING
4.6

Precautions on Wiring

Perform wiring observing the following completely.
1 Noise processing
The main circuit of the Servo Amplifier uses IGBTs under PWM control. If the wiring
processing is not earthed properly, switching noise may occur by di/dt and dv/dt
generated when IGBT is switched. Because the Servo Amplifier incorporates
electronic circuits such as the CPU, it is necessary to perform wiring and processing so
as to prevent external noise from invading to the utmost.
To prevent trouble due to this noise in advance, perform wiring and grounding securely.
The power noise resistance (normal, common noise) of the Servo Amplifier is within 30
minutes at 1500 V, 1 µsec. Do not conduct a noise test for more than 30 minutes.
2 Motor frame earth
When the machine is grounded through the frame, Cf x dv / dt current flows from the
PWM power unit of the Servo Amplifier through the motor floating capacity (Cf).
To prevent any adverse effect due to this current, be sure to connect the motor terminal
(motor frame) to the PE (protective earth) terminal (
Also, be sure to ground it directly.
3 Wire grounding
When a motor is wired to a metal conduit or box, be sure to ground the metal. In this
case, perform one-point grounding.
4 Miswiring
Since miswiring in the Servo Amplifier and the Servomotor may damage equipment, be
sure to check that wiring has been performed properly.
5 Protection against input overcurrent
Be sure to connect a UL-approved circuit breaker and a fast-blown fuse to the Servo
Amplifier input to protect the power line. For the capacity of the fast-blown fuse, refer
to the following.
Amplifier capacity 15 A, 30 A : 30 A fast-blown type
Amplifier capacity 50 A
AC power
supply
Ａ Ｃ 電源
Circuit breaker サーキッ ト ブレ ーカ
) of the Servo Amplifier.
: 50 A fast-blown type
MC
ＭＣ
Fast-blown fuse
速断タ イ プヒ ュ ーズ
4－19
PY2
Servo Amplifier
サーボアンプＰ Ｙ ２
CNA
Ｃ Ｎ Ａ
r
ｒ
t
ｔ
R
Ｒ
S
Ｓ
T
Ｔ