Datalogic Matrix 120 Reference Manual page 67

CBX ELECTRICAL CONNECTIONS
INPUT 2 CONNECTIONS USING EXTERNAL POWER
Power to
Input Device Signal
NPN Input 2 Using MATRIX 120 Power
Figure 42 - PNP Input 2 Using External Power
Pulled up to External
Input Device Power
Figure 43 - NPN Input 2 Using External Power
Input Device
Input
Input Device
Reference
Input Device
Input
Signal
Pulled down to External
Input Device Reference
Input Device
Input
Signal
4
55