SPECIFICATIONS

Application: Computer

Brand Name: ReYeBu

Condition: New

High-concerned chemical: none

Origin: Mainland China

Package: SMD

Type: Voltage Regulator

is_customized: Yes

Microcontroller TTL to RS485 Module 485 to Serial UART Level Conversion

 

Description:

Features of this module:

 

1. We guarantee that all chips are brand new imported industrial-grade chips with ultra-long-distance transmission up to thousands of meters.

 

2. ESD protection with plus or minus 15KV

 

3. The chip has a limited slew rate driver, which effectively reduces EMI and reduces signal reflection caused by improper terminal matching cables, so that the error-free signal transmission rate is as high as 500Kbps.

 

4. Receiver input impedance with 1/4 unit load, supports multi-machine communication, and allows connection to the bus of 128 devices.

 

5. The operating temperature of industrial-grade chips can reach -40°C to +85°C.

 

6. This module can be hot-swapped, and there will be no signal plugging caused by hot-swapping of other 485 chips.

 

7. The power supply uses SMD tantalum electrolytic capacitors, and uses double capacitors for high and low frequency power supply filtering

 

8. Using dual transient suppression diodes, the overvoltage protection performance is better

 

9. Use 10Ω current protection resistor, patch design to improve 485 signal integrity

 

10. With terminals and welding lead holes, it is convenient to debug and finalize the wiring, and the welding leads can improve signal reliability

 

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

 

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

 

13. With 2.54 pitch hole plate welding holes, it is convenient for your secondary development

 

14. With M3 screw holes that are quite commonly used at present, it is convenient and reliable to install

 

15. With 120Ω termination resistance, short-circuit R16 to enable termination resistance

 

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

 

17. The angled pins are led out for easy testing

 

18. Support 3.3V and 5V signal control, stronger compatibility

 

 

It is well known that the flow control of 485 signal is very difficult to write programs, especially in some unknown communication data protocols. You don’t know the amount of data per packet and you don’t know when to switch the direction of sending and receiving. Then you can use our store’s 485 automatic flow control. Module to solve the above troubles. The protection function of this module is absolutely beyond the value. You can compare with other 485 control modules and you will definitely find that the design of this module is reasonable and super value.

 

The TTL to 485 automatic flow control module launched by this store uses a 485 chip with integrated automatic transmission and reception functions, and never uses an external automatic control chip to ensure that each is a new original chip, which is safer and more reliable than other automatic flow control methods (specific You can refer to the detailed parameters below, which are absolutely unmatched by other 485 automatic flow control modules).

 

This module is designed and produced by the store’s joint in-service hardware engineers based on rich actual product development experience, and each module is strictly tested to ensure that it supports 500Kbps baud rate and its perfect operation (the current mainstream 2400bps, 4800bps, 9600bps, 19200bps, 38400bps, 57600bps, 115200bps, 128000bps, 256000bps, etc. are perfectly self-identified and automatically select the appropriate communication rate mode), and no external control chip is used.

 

At the beginning of the design of this module, it is considered to be used in harsh environments, so the signal integrity and EMC characteristics of the module are improved. This chip has been used in formal industrial-grade products, so the performance is very reliable.

 

The module is recommended to use 5V power supply (because the 485 signal level range is 2-6V, the long-distance reliability of 3.3V power supply is reduced), and both 3.3V and 5V signal control can be used (Note: The power supply uses 5V, and the signal uses 3.3V fully support , We have done signal protection, please rest assured)

 

If you have strict signal requirements, please use this module. This module has the function of supporting automatic flow control up to 500Kbps baud rate, and automatically recognizes when the baud rate is lower than 500Kbps without human intervention.