TTL to RS485 module RS485 mutual conversion to TTL signal Single chip microcomputer serial port UART lightning protection hardware automatic flow control

This transparent transmission module realizes the mutual conversion of TTL signal and RS485 signal, but everyone must know that 485 is half-duplex communication. This communication method can realize two-way communication, but it cannot be carried out in both directions at the same time. Take turns alternately; that is to say, each segment of the communication channel can be the sender or the receiver, but at the same time, the information can only have one transmission direction.

Realize the automatic flow control of RS485 signal, automatic switching of the sending and receiving direction, using this module is as easy as operating the serial port.

Baud rate: 110~256000bps

Module highlights:

(1) Wide voltage power supply (3.0V~30V), the limit voltage is 33V, it is recommended to use within 30V, and the minimum voltage should be higher than 2.8V.

(2) Compatible with 3.3V and 5.0V signals, both can match the module

(3) It has extremely high EMC and EMI performance.

(4) Strong anti-interference ability, while adopting powerful 485 lightning protection design, working temperature is -40℃ to +85℃.

(5) With wiring terminals and silicone wire, it is very convenient to use.

(6) With RXD, TXD signal indicator

Module features:

(1) This module fully considers the lightning protection design and anti-interference design of the 485 bus, and has extremely high EMC (electromagnetic compatibility) and EMI (electromagnetic anti-interference) performance. When long-distance transmission in the field, connect the “earth” end of the module Connecting to the earth can play a good role in anti-interference and lightning protection, making the 485 bus safer; it is not necessary to connect to the earth during indoor short-distance transmission.

(2) With standard 2.54 pitch pin headers, it is convenient for your secondary development

(3) It has a matching resistance of 120 ohms. Short-circuiting R0 can enable the matching resistance. It is recommended to short-circuit it for long-distance transmission.

(4) Support multi-machine communication, at least 40 nodes can be connected to the same network

(5) It can be hot-swapped, and the signal will not be blocked

(6) Anti-interference wiring and copper laying method to prevent signal interference