Yaskawa MEMOCON GL120 - Manual (Page 21)

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Introduction and Precautions
1.2.5 Applications Precautions
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1.2.5 Applications Precautions
WARNING Do not touch terminals while the power is ON.
Touching live terminals may cause electric shock.
WARNING Construct an emergency stop circuit and an interlock circuit outside of the GL120 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 using the lad-
der 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 supply ON
Emergency stop
Servo OFF
Surge absorber
Noise filter
Control signal to MC Module
Encoder
Servo motor
Noise filter
Control power
supply OFF
Servo ON
ESP-TBOX
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