E-10
• Select the I/O signal wires for external wiring to con-
nect the Machine Controller to external devices 
based on the following criteria:
• Mechanical strength
• Noise interference
• Wiring distance
• Signal voltage
• Separate the I/O signal cables for control circuits 
from the power cables both inside and outside the 
control panel to reduce the influence of noise from 
the power cables.
If the I/O signal lines and power lines are not separated 
properly, malfunction may occur.
CAUTION
Example of Separated Cables 
Power cable 
I/O signal  
cables in  
control circuits 
Steel separator