Yaskawa MEMOCON GL120 - Manual (Page 20)

1.2 Precautions
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Power Supply Noise Reduction
• Prevent noise from penetrating into the product by installing an isolation transformer or
a noise filter for the external power supply.
Noise from power supply may result in the malfunctioning of GL120 and GL130.
Select, Separate, and Lay External Wiring Correctly
• I/O lines connecting external devices to the 120-series I/O Modules must be selected
based on the following considerations: mechanical strength, resistance to noise, wiring
distance, signal voltage, etc.
• I/O lines must be separated from power lines both inside and outside the control panel
to minimize the affects of noise. Faulty operation may result if I/O lines are not sufficient-
ly separated from power lines.
Example of external wiring separation
Power lines General control
circuit cables
Control panel separator
Digital I/O
signal cables
Analog I/O
signal cables
Pulse input
signal cables
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