Microcontroller TTL to RS485 Adapter Module 485 to Serial Port UART Level Mutual Transfer Hardware Automatic Flow Direction Control Module 3.3V 5V SSD HDD HDMI SATA III

Microcontroller TTL to RS485 Adapter Module 485 to Serial Port UART Level Mutual Transfer Hardware Automatic Flow Direction Control Module 3.3V 5V
 
TTL to RS485 485 to Serial UART Adapter
Has RXD, TXD signal indicator light, monitor send and receive status.
Compatible with 3.3V and 5.0V power supply.
Support multi-machine communication, allowing access at up to 128 devices on the bus
The module can be hot swapped, the signal does not appear dead phenomenon.
 
3.3V is compatible with 5.0V power supply, 3.3V is compatible with 5.0V signal, baud rate: 110~128000bps.
With RXD and TXD signal indicators, the sending and receiving status is clearer.
That is to say, each end of a communication channel can be a sender or a receiver, but at the same time, information can only be transmitted in one direction.
It has a 120 ohm matching resistance, and the matching resistance can be enabled by short-circuiting R0.
It is recommended to short-circuit the long-distance transmission. It supports multi-computer communication and is allowed to be connected to the bus of more than 128 devices.