NPN/PNP to NPN Squarewave Signal Conversion Module, Level Voltage Converter Module, for Level Conversion Single Chip Microcomputer Signal Isolation: Amazon.com: Industrial & Scientific
Slim DIN Rail Mount NPN to PNP/PNP to NPN Sensor Logic Signal Converter Module: Amazon.com: Industrial & Scientific
eletechsup 4 CH 3.3V 5V PNP-NPN Digital Logic Converter 5A MOS Solid State Relay PLC Signal Amplifier Board for Motor Relay (4 x no Shell): Amazon.com: Industrial & Scientific
PNP NPN Transistor Meter, Wave Signal Generator GM328A 2 Decimal Values 9V for Signal: Amazon.com: Industrial & Scientific
ASI XNPNPNP Sensor Signal Converter for DC Logic Signals, NPN to PNP, PNP to NPN, 12 mm Wide (Pack of 5): Amazon.com: Industrial & Scientific
Amazon.com: IS Voltage Level Translator, Icstation 4 Channel Voltage Level Converter Opto Isolator Board PNP NPN PLC Signal Converter Module 24V to 5V : Industrial & Scientific
Npn to Pnp Level Converter,8-Channel Npn to Pnp Signal Converter, 8-Channel Optically Isolated Module for Npn to Pnp Level Conversion Wide Voltage 10-28V: Amazon.com: Industrial & Scientific
Slim DIN Rail Mount NPN to PNP/PNP to NPN Sensor Logic Signal Converter Module: Amazon.com: Industrial & Scientific
Slim DIN Rail Mount NPN to PNP/PNP to NPN Sensor Logic Signal Converter Module: Amazon.com: Industrial & Scientific