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E810-U21CS USB to RS485/TTL Converter Industrial grade TTL conversion module communication adapter photoelectric isolation RS422 high protection protection industrial lightning protection 3M high speed
[Introduction]：E810-U21CS is an industrial-grade USB to 2-way RS485 conversion module. With an external USB interface, it can convert to 2 independent RS485 interfaces without affecting each other. It is suitable for scenarios where the computer is connected to multiple RS485 networks at the same time. It has a built-in RS485 automatic transceiver switching circuit and independent pin control switching, making RS485 communication more reliable and allowing more devices to be connected at the same time.
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| serial number | name | Function | illustrate |
| 1 | ON | Connect to earth terminal | 5.08mm spring terminal, connected to ground |
| 2 | A1 | RS485-1 A port | 5.08mm spring terminal, connect to the A interface of the communication partner |
| 3 | B1 | RS485-1 B port | 5.08mm spring terminal, connect to the B interface of the communication partner |
| 4 | G | Digital signal ground interface | 5.08mm spring terminal, connect to the GND interface of the communication partner |
| 5 | A2 | RS485-2 A port | 5.08mm spring terminal, connect to the A interface of the communication partner |
| 6 | B2 | RS485-2 B port | 5.08mm spring terminal, connect to the B interface of the communication partner |
| 7 | USB | USB interface | type-c interface, USB2.0 |
| 8 | LED-PWR | Power indicator light | Power on: solid red Power off: light off |
| 9 | LED-TXD1 | Channel 1 data sending indicator light | Data interaction: yellow light flashes No data interaction: off |
| 10 | LED-RXD1 | Channel 1 data receiving indicator light | Data interaction: yellow light flashes No data interaction: off |
| 11 | LED-TXD2 | Channel 2 data sending indicator light | Data interaction: yellow light flashes No data interaction: off |
| 12 | LED-RXD2 | Channel 2 data receiving indicator light | Data interaction: yellow light flashes No data interaction: off |