Unitronics Vision OPLC V130-33-R2 Installation Manual page 6

Input wiring npn (sink)
HSC input wiring, npn (sink)
Shaft-encoder
Analog input wiring, voltage/current (4-wire)
Shields should be connected at the signal's source.
The 0V signal of the analog input must be connected to the controller's 0V.
6
V130-33-R2 Installation Guide
Input wiring pnp (source)
HSC input wiring, pnp (source)
Analog input wiring, current (2/3 wire)
Unitronics