TTL to RS485 module single-chip microcomputer serial port hardware automatic flow control

TTL to RS485 module RS485 mutual conversion to TTL signal MCU serial port UART lightning protection hardware automatic flow control The pass-through module implements a TTL signal and RS485 signal 's conversion, but we must know, 485 is a half-duplex communication, this communication a two-way communication can be achieved, but not both simultaneously in both directions, must 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 the RS485 signal , and automatically switch the sending and receiving directions. Using this module is as easy as operating the serial port. Baud rate: 110~256000bps Module highlights: (1) wide voltage supply (3.0V ~ 30 V ) , the limit voltage 33V , recommended 30V provided with the minimum voltage is 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. The matching resistance can be enabled by short-circuiting R0 . 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-plugged, and the signal will not be blocked ( 6 ) Anti-interference wiring and copper laying method to prevent signal interference