KEYENCE CV-X Series - Manual (Page 11)

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Example of connections (NPN output)
When connecting an NPN output from the controller to a PLC with a positive common
When connecting an NPN output from the controller to a relay
Example of connections (PNP output type, controllers with a "P" at the end of the part number)
When connecting a PNP output from the controller to a PLC with a negative common
When connecting a PNP output from the controller to a relay
PLC input circuit positive common Output circuit on controller
Output circuit on controller Relay
PLC input circuit negative common Output circuit on controller
Output circuit on controller Relay