SMC Networks PFMC7501-L Operation Manual page 26

Example of wiring for accumulated pulse output
NPN output type
PFMC7###-##-L#-###
NPN 2 outputs + Analogue output type
PFMC7###-##-L2#-###
NPN (1 output) + Analogue output type
PFMC7###-##-L3/L4#-###
PNP output type
PFMC7###-##-B#-###
PNP 2 outputs
PFMC7###-##-L2#-###
PNP (1 output) + Analogue output type
PFMC7###-##-L3/L4#-###
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No.PF※※-OMY0002