USB to RS485 Industrial Converter Module Adapter Board

Description

Pin Description:

pin 1:  A–485 Signal Terminal A
pin 2:  B–485 Signal Terminal B
pin 3:  GND–485 signal ground (optional)
pin 4:  GND- external power supply ground (can be used to supply power to other equipment or it can be empty)
pin 5:  VCC – external power supply 5V+(can be used to supply power to other equipment or it can be empty)