TTL to RS485 485 to Serial Port UART Module Conversion Automatic Two-way

Specification: 3.3*1.9*1.8cm

Supply voltage: 5V

Serial communication level: support 5V and 3.3V TTL level

Output port: RS485 port

Communication distance: up to 1000 meters (twisted pair test)

Parallel devices: support 128 devices in parallel

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 slew rate limiting driver to minimize EMI and reduce signal reflection caused by inappropriate 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 with up to 128 devices.

5. The working temperature of industrial-grade chips can reach -40℃ to +85℃.

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

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

8. Using dual transient suppression TVS 600W diodes, the overvoltage protection performance is better

9. Using 100Ω current protection resistor, patch design improves 485 signal integrity

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

11. All RS485 and TTL signals are 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, 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 terminal resistance, short-circuit the SET point to enable the terminal resistance (when the line length exceeds 200 meters, the resistance signal is enabled to reduce the bit error rate more stably)

16. With RXD signal indicator, serial port input protection

17. The angled pins are led out for easy testing. You can also solder the straight pins and install them on the PCB board by yourself.

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

19. Support the mainstream baud rate of 2400bps, 4800bps, 9600bps, 19200bps, 38400bps, 57600bps, 115200bps, 128000bps, 256000bps, etc.