Module interface definition: Module 4P Terminal side: VCC: + 5V TXD : The module's TTL (UART) to send, connected to the microcontroller's RXD receiver pin; RXD : The module's TTL (UART) receiver, connected to the microcontroller TXD send pin; GND : The module ground wire (this wire must be connected with the ground wire of microcontroller system); Module 5P Terminal side: R + / A : A-Pin of this module, connected to T + / Y pin of other 422 modules; R- / B : B-Pin of this module, connected toT- / Z pin of other 422 modules; T- / Z -: Z-Pin of this module, connected to R- / B of other 422 modules; T + / Y : Y-Pin of this module, connected to R + / A pin of other 422 modules; GND : Ground wire; Package Included: 1xRS422 to TTL / UART / MCU Serial Port Signal Mutual Conversion Module

NOYITO RS422 to TTL UART MCU Serial Port Signal Mutual Conversion Module https://1drv.ms/u/s!AlzQUCOyZQhKgWvO3IgUxJf-K4T7?e=dvf0zI. With power and send & receive Indicator lights. The back of the product with wiring diagram. The module except for the pin, Use SMD components to ensure better signal transmission, thereby enhancing the system EMC and other characteristics, the module as possible in more harsh environments. With over-voltage and over-current protection circuit real-time protection RS422 level signal to protect the MAX490 chip's normal work. The module is suitable for 5V TTL and RS422 signal mutual conversion, RS422 level is full-duplex level signal, the use of this module can be achieved SCM serial port and RS422 signal conversion.