MCU TTL to RS485 module 485 to serial port UART level inter-conversion automatic flow direction control 3.3-5V

Description:            

Product Introduction

1. The chip has a slew-rate limiting driver to minimize E MI and reduce signal reflection caused by improper termination matching cables, so that the error-free signal transmission rate is up to 500Kbp S.

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

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

4. The power supply uses SMD tantalum capacitors, and dual capacitors are used for high and low frequency power supply filtering.

5. The use of double transient suppression diodes has better overvoltage protection performance.

6. Use 10Ω current protection resistor, SMD design to improve 485 signal integrity.

7. It has terminals and soldering lead holes, which is convenient for debugging and finalizing wiring, and soldering leads can improve signal reliability.

8. RS485 and TTL signals are all single-sided wiring to ensure signal quality and improve signal integrity.

9. Large-area copper pouring to prevent signal interference. 10. Reserve 2.54mm pin header jack.

11. Reserve 4 positioning holes, easy and reliable installation.

12. It has a 120Ω termination resistor, and the termination resistor can be enabled by shorting R16.

13. It has power supply and RXD, TXD signal indicator, and the sending and receiving status can be seen at a glance.

14.4P bent pin header is drawn out for easy testing.

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

16. TTL to 485 automatic flow control module, 485 chip with integrated automatic sending and receiving function.

17. Support 500Kbps baud rate and below operation (the current mainstream 2400bps, 4800bps, 9600bps, 19200bps, 38400bps, 57600bps, 115200bps, 128000bps, 256000bps, etc. are all independently identified and automatically selected the appropriate communication rate mode)

Notes:

It 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).

Both 3.3V and 5V signal control can be used (Note: 5V is used for power supply, and 3.3V is fully supported for signal) Packaging and list: electrostatic bag