The USB to RS485 Converter Adapter Module provides an easy-to-use RS485 Interface by adding a Virtual COM Port to a PC. This is a fully automatic plug-and-play USB module that can be connected to a PC via the Universal Serial Bus (USB) port and provides a USB to RS-485 protocol conversion with automatic RS-485 flow control. This industry-based module operates on a differential signaling method of measurement rather than voltage measurement with respect to GND pins.
(edit with the Customer Reassurance module)
(edit with the Customer Reassurance module)
(edit with the Customer Reassurance module)
The USB to RS485 Converter has 74HC00D IC, MAX485 IC, and a CH430 IC and a clock crystal without markings. The 74HC00D IC is a quad 2-input NAND gate having clamp diodes at its input. This enables the use of current limiting resistors to interface inputs to voltages in excess of operating voltage.