USB to Multi-Protocol Serial Adapter: RS-232 / TTL UART / RS-485
USB adapter supporting RS-232, TTL UART, RS-485, and RS-422 on screw-terminal connectors, requiring no soldering. A single adapter covers the four most common serial protocols. Select the active protocol via onboard configuration; screw terminals accept bare wire ends directly.
Pinout
- 5V
USB-derived 5 V supply exposed on the TTL side; product page states the adapter provides 5V power for small projects.
Type · powerVoltage · 5V from USB, limited current for small projects - 3.3V
3.3 V supply exposed on the TTL side; product page states the adapter provides 3V power with matching ground.
Type · powerVoltage · 3.3V supply output - GND
Ground reference, exposed with the TTL/RS232 terminal groups in the product diagram.
Type · groundVoltage · 0V reference - TTL TXD
5 V logic-level UART transmit from the USB serial adapter; product page states the UART side exposes RX/TX and 5V/3V/GND.
Type · signalVoltage · 5V logic level - TTL RXD
5 V logic-level UART receive into the USB serial adapter; product page states the UART side exposes RX/TX and 5V/3V/GND.
Start wiring
Ethernet · UART · SPI · Shield
Confirm the data interface matches your host board.
Module pins: 5V, 3.3V, GND, TTL TXD, TTL RXD, RS232 TXD, RS232 RXD, RS232 RTS. Schematik maps them to your board in the app.
Wired comms
115 other optionsW5100/W5500 Ethernet shields, LAN8720 RMII PHY boards, MAX3243 RS-232 level shifters, isolated USB-to-RS485 converters, CAN FD bridges, and passive or active PoE injectors and splitters.
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