No-voltage inputs are short-circuit or open-circuit inputs, and are typically NPN.
Voltage inputs are voltage imposition or open, and are typically PNP.
See below reference for further documentation:
https://assets.omron.com/m/541b101861257edf/original/H3CR-A-F-G-H-Datasheet.pdf
Summary
H3CR-A AC100-240/DC100-125
H3CR-A8-302 DC24
H3CR-AS AC24-48/DC12-48
H3CR-A AC24-48/DC12-48
H3CR-A8 AC100-240/DC100-125
H3CR-A8E AC/DC24-48
H3CR-A-301 AC100-240/DC100-125
H3CR-AP AC100-240/DC100-125
H3CR-A8-301 AC24-48/DC12-48
H3CR-A8E AC100-240/DC100-125
H3CR-AP AC24-48/DC12-48
H3CR-A8 AC24-48/DC12-48
H3CR-A8-301 AC100-240/DC100125
H3CR-A-300 AC24-48/DC12-48
H3CR-A-301 AC24-48/DC12-48
H3CRA8AC100240DC100125Q1
H3CR-A8S AC24-48/DC12-48
H3CRAAC2448DC1248Q1
H3CRA8EAC100240DC100125Q1
H3CRA8AC2448DC1248Q1
H3CR-A-300 AC100-240/DC100-125
H3CRA8EACDC2448Q1
H3CRAAC100240DC100125Q1
OSA-A3