Icstation 4 Channel Voltage Level Translator Opto Isolator Board PNP NPN PLC Signal Converter Module 12V to 3.3V 4 channel 12V to 3.3V opto isolator board used for MCU/PLC signal level converting,PNP/NPN to NPN Each channel equipped with indicator easier to recognise working status Maximum Conversion Frequency:20KHz, Board Size:72 X 55 X 18mm/2.83 X 2.17 X 0.71inch(L*W*H) Mounting Hole Pitch: 64X47mm, Hole Diameter 3mm Ship out by USPS with tracking information and 7-17 days delivery time usually Type: 12V to 3.3V Channel:4 Maximum Conversion Frequency: 20KHz Board Size: 72X55X18mm(L*W*H) Mounting Hole Pitch: 64X47mm Hole Diameter: 3mm signal isolation MCU/PLC signal level converting PNP/NPN signal to NPN signal signal level voltage converter