Application Precautions - YASKAWA MEMOCON GL120 User Manual

1.2.5

Application Precautions

• Do not touch the Module terminals while the power is ON.
WARNING
Touching live terminals may cause electric shock.
• Construct an emergency stop circuit and an interlock circuit outside of the GL120
WARNING
and GL130.
The absence of emergency stop and interlock circuits may result in machine
damage or accidents should the GL120 or GL130 fail.
Install an Emergency Stop Circuit Outside the GL120 and GL130.
An emergency stop circuit for the control system should not be constructed
WARNING
using the ladder programming in the GL120 and GL130. Always construct the
emergency stop circuit externally using a relay circuit, as shown in the figure
below.
Use an N.C. contact (mechanical contact) in the emergency stop switch. The
main power supply to the servo must be cut off by pressing the switch.
Failure to provide an emergency stop circuit as described above, may result in
failure of the emergency stop when input circuits fail or cables break, and may
cause machine damage or injury.
Control power
Control power supply ON
supply OFF
MC1
Servo OFF
Emergency stop
MC1
ESP-TBOX ALM
Noise filter
MEMOCON GL120, GL130
Noise filter
MC1
r
SERVOPACK
t
MC2
r
s
t
1-11
MC1
Z
Servo ON
MC2
MC2 Z
Surge absorber
Control signal to MC Module
Encoder
U
Servomotor
V
W
1.2 Precautions
1