ماژول مبدل TTL به RS485 دو طرفه
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تاریخ تقریبی موجودی:
ماژول شبکه ENC28J60 spi
آی سی MT8888CS( DTMF transmitter/receiver)
Single-chip TTL to RS485 module 485 to serial port UART level of each other hardware automatic flow control
1-3.3V and 5.0V power supply
2-3.3V and 5.0V signals
3-Absolute use of imported chips, industrial design, anti-interference ability, while the more effective 485 lightning design, industrial and field can be used in harsh environments, the working temperature of -40 ℃ to + 85 ℃, the transmission distance of 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)
4- with half hole process design, thickness 0.8mm, can be easily used as a motherboard, but also can be used for welding terminals
5- with RXD, TXD signal indicator, send and receive situation panoramic view
1- This module fully considered the 485 bus lightning protection design and anti-jamming design , in the field of long-distance transmission, the module "then the earth" side access to the earth, can play a very good anti-interference and lightning protection , So that 485 bus more secure; indoor short-distance transmission can not access the earth.
2- using the standard 2.54 pitch design, to facilitate your secondary development
3- with 120 ohm matching resistance, shorted R0 can be enabled to match the resistance, long-distance transmission recommended shorted.
4- support multi-machine communication, allowing access to up to 128 devices on the bus
5-The module can be hot-swappable, there will not be other 485 chip hot plug appears the phenomenon of signal death
6- a large area of copper, to prevent signal interference