Omron V7-IP65 Quick Start Manual page 36

Selecting Input Method
When connecting sequence inputs (S1 to S7)
with transistor, turn the rotary switch SW1
depending on the polarity (0V common: NPN
side, +24 V common: PNP side).
Factory setting: NPN side
Selecting Sequence Input Method
By using SW1, NPN or PNP input can be selected as shown below.
(Default setting)
EN-7