XC3000S Series Laser Cutting
System Commissioning Manual
2.3.3 Digital input interface
When COM1 is connected to 24V, the input signal is active low; when COM1 is connected to 0V, the
input signal is active high. Take NPN and PNP sensors as an example:
When using the NPN type limit, the COM1 port is connected to 24V.
When using PNP type limits, the COM1 port is connected to 0V.
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