TTL Turn To RS485 Module Hardware Automatic Flow Control Module 3.3V-5V Serial UART Level Mutual Conversion Power Supply Board

TTL Turn To RS485 Module Hardware Automatic Flow Control Module 3.3V-5V Serial UART Level Mutual Conversion Power Supply Board

Explanation:

TTL to 485 automatic flow to the control module, integrated 485 ch with automatic transceiver function. Supports perfect operation of 500Kbps baud rate and below (current mainstream 2400bps, 4800bps, 9600bps, 19200bps, 38400bps, 57600bps, 115200bps, 128000bps, 256000bps, etc., all perfectly independently identify and automatically select the appropriate communication rate mode).

Features:

1. 4P curved pin header leads out for easy testing.

2. Support 3.3V and 5V signal control, more compatible.

3. A large area of copper is laid to prevent signal interference.

4. Reserve 4 positioning holes and 2.54mm pin header jacks.

5. Using 10Ω current protection resistor, SMD design improves 485 signal integrity.

6. With a 120Ω termination resistor, short R16 to enable the termination resistor.

7. Using dual transient suppreion diodes, the overvoltage protection performance is better.

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

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

10. The power supply uses ch tantalum capacitors, and uses double capacitors for high and low frequency power supply filtering.

11. This module can be hot-swapped, and there will be no signal lockout phenomenon that occurs when other 485 chs are hot-swapped.

12. With terminals and welding lead holes, it is convenient for debugging and finalized wiring, and welding leads can improve signal reliability.

13. 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.

14. The ch has a limited slew rate driver to minimize EMI and reduce signal reflections caused by improperly terminated cables, enabling error-free signal transmiion rates up to 500Kbps.

Notice:

It is recommended to use 5V power supply (because the 485 signal level range is 2-6V, so the long-distance reliability of 3.3V power supply is reduced), both 3.3V and 5V signal control can be used (Note: The power supply uses 5V, and the signal uses 3.3V to fully support)

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