TTL turn to RS485 Power Supply Converter Board 3.3V 5V Hardware Auto Control Module  For AVR Voltage Singal Indicator

This transmission module to achieve the TTL signal and RS485 signal interchange, but we must know, 485 is half duplex communication, this communication can achieve two-way communication, but not in both directions at the same time, must Alternately; that is, each section of the communication channel can be either a transmitting end or a receiving end, but at the same time, the information can have only one transmission direction.

To achieve the RS485 signal automatic flow control, send and receive direction automatically switch, use this module with your operation as simple as the serial port
Baud rate: 110 ~ 256000bps

Module Highlights:

(1) power supply (3.0V ~ 30V), the limit voltage of 33V, it is recommended to use within 30V, the minimum voltage is higher than 2.8V.
(2) compatible with 3.3V and 5.0V signals, can match the module
(3) has a very high EMC and EMI performance.

(4) the use of imported chips, industrial design, anti-interference ability, while the use of powerful 485 design, industrial and field can be used in harsh environments, the working temperature of -40 ° to +85 °, transmission Distance up to kilometers (with 850 meters of 2 * 1.5 cable to do the test, it is recommended to use within 800 meters, more than 800 meters plus repeaters)
(5) with a terminal block and silicone wire, the use of very convenient.
(6) with RXD, TXD signal indicator, send and receive situation panoramic view.