SPECIFICATIONS

MCU TTL to RS485 module 485 to serial port UART level mutual conversion Hardware automatic flow control
The only 3.3V and 5.0V power supply in the whole network. RS485 automatic flow to control module
No need to "receive-send" control, using this module is as easy as operating the serial port
This transparent transmission module realizes the mutual conversion of TTL signal and RS485 signal, but everyone must know that 485 is half-duplex communication.way of communicationTwo-way communication can be realized, but it cannot be carried out in both directions at the same time. It must be carried out alternately; that is, each end of the communication channel can be the sending end or the receiving end, but at the same time, the information is only There can be a transmission direction.
Baud rate: 110~256000bps
Module highlights:
(1) 3.3V and 5.0V power supply
(2) 3.3V and 5.0V signal
The anti-interference ability is super strong, and the more effective 485 lightning protection design is adopted. It can be used in the harsh environment of the industrial site and the field. The working temperature is -40° to +85°, and the transmission distance can reach kilometers (850 (For testing with a 2*1.5 meter cable, it is recommended to use it within 800 meters, please add a repeater if it exceeds 800 meters)
(4) The half-hole process design is adopted, and the thickness of the board is 0.8mm, which can be easily used as a mother board or solder terminal
(5) With RXD.TXD signal indicator, you can have a panoramic view of the transceiver status

Module features:

(1) This module fully considers the 485 bus lightning protection design and anti-interference design. When long-distance transmission in the field, connect the "earth-to-earth" end of the module to the earth, which can play a good role in anti-interference and lightning protection. , To make the 485 bus safer; the indoor short-distance transmission can not be connected to the earth.

(2) Adopt standard 2.54 pitch design to facilitate your secondary development

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

(4) Support multi-machine communication, allowing connection to the bus of up to 128 devices

(5) This module can be hot-plugged, and there will be no signal plugging phenomenon caused by hot-plugging of other 485 chips

(6) Spread copper on a large area to prevent signal interference

Standard: USB2.0 standard, backward compatible, in line with RS485 standard

1. All chips we guarantee are imported industrial chips of brand new & original, and the transmission of ultra distance can reach up to thousands of meters.

2. ESD protection with positive and negative 15KV

3. The chip has a limited swing rate driver to reduce EMI and signal reflection caused by inappropriate terminal matching cables, thus making the signal transmission rate of zero defect up to 500 kbps.

4, with 1/4 unit load of the receiver input impedance, support multi-machine communication to is not more than 128 devices on the bus.

5, industrial chip operating temperature can reach-40 ℃ to +85 ℃.

6. This module can be hot-swap, and there will be no signal plug-in phenomenon hot-swap other 485 chips.

7. The power supply uses a patch-on-aluminum electrolytic capacitor, and uses double capacitors for high and low frequency power supply filtering.

8. Excellent overvoltage protection performance with dual transient suppression diode

9. Use 10Ω current to protect electronic resistance and patch design to improve signal integrity of 485

10. It has terminals and welding lead holes, which are convenient for debugging and fixing wiring. Welding lead can improve signal reliability.

11. RS485 and TTL signals are all connected on one side to ensure signal quality and improve signal integrity.

12. Spread copper in a large area to prevent signal interference

13. Wire-wrap board welding holes with 2.54 spacing are convenient for your secondary development

14. It has M3 screw holes which are commonly used at present, and is easy and reliable to install

15. With 120Ω termination electronic resistance, short circuit R16 can enable termination electronic resistance

16. With power supply, RXD and TXD signal indicator lights, you can have a panoramic view of the sending and receiving status

17. The Corner Pin leads out, which is convenient for testing

18. Support 3.3V and 5V signalling control, strong compatibility

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

Module description:

This product through a high-end isolation chip to achieve TTL, RS485 on both sides of the power and signal perfect isolation, anti-interference ability. The power supply is a wide voltage input (3.0V-5.5V), which enables perfect compatibility between 3.3v system and 5.0V system. 3.3V or 5.0v communication signals can be matched.

This transparent transmission module realized TTL signal and RS485 signal mutual transfer, but we must know, 485

This communication mode can realize two-way communication, but cannot be carried out in both directions at the same time. It must be carried out alternately, that is to say, each end of the communication channel can be the sending end or the receiving end, but at the same time, information can only have one transmission direction.

Realize the automatic flow control of RS485 signal and automatic switch of sending and receiving direction. Using this module is as simple as your operation of serial port.

Baud rate :100-256000bps perfect support

Module highlights:

1, wide voltage supply (3.0V-5.5V)

2. 3.3v and 5.0V signals are perfectly compatible and can be matched with the module

3, power and signal completely isolated, high EMC and EMlI performance, isolation voltage up to 2500vDc4, industrial design, strong anti-interference ability, while using a more powerful 485 lightning protection design, can be used in the industrial site and wild harsh environment, the working temperature of -40℃ to +85℃, Transmission distance up to kilometers (with 850 meters of 2*1.5 cable test, it is recommended to use within 800 meters, more than 80o meters please add a repeater)

5, adopt half hole process design, board thickness 0.8mm, can be easily used as the word mother board, can also be used for welding terminals

6, with RXD, TXD signal indicator light, sending and receiving state panoramic view

Module features:

1, this module fully considers the 485 bus lightning protection design and anti-interference design, the use of isolation chip, realize the isolation of power and signal, with isolation and bus protection functions, extremely high EMC(electromagnetic compatibility), EMI(electromagnetic anti-interference) performance, in the field of foreign distance transmission, the "ground" end of the module into the earth, It can play a very good role of anti-interference and lightning protection, so that the 485 bus is safer, indoor short distance transmission can not access the earth.

2, the standard 2.54 spacing design, convenient for your secondary development

3, with 120 euro matching resistance, short connection Ro can enable matching resistance, long distance transmission recommended short connection 4, support multi-machine communication, the same network can be connected to at least 128 nodes

5, can be hot swap, will not appear the phenomenon of signal plug

6, anti-interference type wiring and copper paving mode, to prevent signal interference

Size drawing:

Function diagram：