Festo FB13 - Page 76

Four or eight inputs are available on the input
modules of the valve terminal for user applica-
tions. The switching logic depends on the type of
input module:
Type of input module Switching logic
INPUT PNP (positive)
INPUT-N NPN (negative)
Input module 4 inputs Input module 8 inputs
Fig. 3/19: Digital PNP input modules (4/8 inputs)
Recommendation for 8-input modules:
Use the Festo duo-cable to connect
two sensors via one plug at low cost.
Socket
with one
digital
input
Green
LED
Socket
with two
digital
inputs
One
green
LED per
digital
input
VIFB13 - 03/05 3. Installation
9701 NH 3-33