OMRON
Transistor Remote I/O Terminals with Connectors
SRT2-MD32ML

I/O classification: Input and output. Internal I/O circuit common: NPN (input: + common; output – common).

OMRON
Transistor Remote I/O Terminals with Connectors
SRT2-MD32ML-1

I/O classification: Input and output. Internal I/O circuit common: PNP (input: – common; output: + common).