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"usb serial uart"
5V USB Relay with Optocoupler Isolation Industrial Grade Support UART Serial Port Signal Control NO/COM/NC Load 2 Channel Relay
Limited time offer, ends 11/10
$53.39
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USB to RS232/485 Serial Converter, Onboard Original FT232RNL Chip, Supports Mac, Linux, Android, Win11/10/8.1/8/7, etc. Multiple Devices Applicable, Multiple Protection, Safe and Stable
Limited time offer, ends 11/07
$58.37
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CableCreation USB to RS232 Adapter with FTDI Chipset, USB to RS232 Male DB9 Serial Converter for Cashier Register, Modem, Scanner, Industrial Machinery, CNC, Black
Limited time offer, ends 12/02
$41.36
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8 Channel Network Relay Module Remote Control Relay Device Ethernet to RS485 TCP Relay Module
Limited time offer, ends 11/07
$109.79
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USB to RS485 Adapter Industrial Isolated Converter with Original FT232RNL Chip, 300bps ~ 512000bps Baud Rate, up to 1.2km RS485 Transmission Distance, Onboard Isolated Transceiver, TVS, etc.
Limited time offer, ends 11/07
$53.87
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8 Channel Network Relay Module Remote Control Relay Device Ethernet to RS485 TCP Relay Module
Limited time offer, ends 11/07
$111.78
Free Shipping
12V Dual Way Bluetooth Relay Module 12V 10A Wireless Smart Relay Module IoT Smart Home Phone APP Remote Control Switch
Limited time offer, ends 11/09
$11.99
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Modbus RTU 4 Channel Relay Module with RS485/TTL UART, 1 Input 1 Output, 7-24V Anti-Reverse Protection for Industrial Home Automation
Limited time offer, ends 11/09
$11.99
Free Shipping
RS232/485/422 to RJ45 ETH Module Serial Server Modbus Gateway MQTT Gateway TCP/IP to Serial, with PoE Function, Bi-Directional Transparent Data Transmission Between RS232/485/422 and Ethernet
Limited time offer, ends 11/07
$103.97
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2Pcs 1 Channel Switch Relay Module Modbus Rtu Switching Input Output Relays Board with Anti-Reverse Connection Protection RS485 TTL Communication
Limited time offer, ends 11/09
$11.99
Free Shipping
4-Channel RS485 Relay Board, Modbus RTU Protocol, 30A High Current 7V~36V, Multi Isolation Protection Circuits, Industrial Grade Rail-Mount Case
Limited time offer, ends 11/07
$83.78
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Waveshare 8-Ch Ethernet Relay Module, Modbus RTU/Modbus TCP Protocol, PoE Port Communication, with Various Isolation and Protection Circuits, Industrial Grade Rail-Mount Case
Limited time offer, ends 11/07
$94.78
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Waveshare Dual Ethernet Ports 8-ch Relay Module (C), Modbus RTU Protocol, PoE Power Supply, with Various Isolation and Protection Circuits, Industrial Grade Rail-Mount Case
Limited time offer, ends 11/07
$110.39
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Waveshare 8-Ch Ethernet Relay Module, Modbus RTU/Modbus TCP Protocol, PoE Port Communication, with Various Isolation and Protection Circuits, Industrial Grade Rail-Mount Case
Limited time offer, ends 11/07
$104.78
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8-CH Ethernet Relay Module, Modbus RTU/Modbus TCP Protocol, PoE Port Communication, with Various Isolation and Protection Circuits
Limited time offer, ends 11/07
$91.78
Free Shipping
Waveshare 8-Ch Ethernet Relay Module, Modbus RTU/Modbus TCP Protocol, PoE Port Communication, with Various Isolation and Protection Circuits, Industrial Grade Rail-Mount Case
Limited time offer, ends 11/07
$102.78
Free Shipping
Modbus-Rtu 7-24V 4 Channel Relay Module Switch Modbus RTU Switch Input Output 5V RS485 TTL Communication Anti-Reverse Connection
Limited time offer, ends 11/09
$11.99
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Waveshare Industrial Modbus RTU 8-ch Relay Module (E) with RS485, 30A High Current, Multi Isolation Protection, Optocoupler Isolation, Flyback Diode Protection, Rail-Mounted Case.
Limited time offer, ends 11/07
$129.39
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Modbus POE ETH Relay 8-CH Ethernet Relay Module Supports Sending Modbus RTU/Modbus TCP Protocol Commands via Ethernet Port to Control Relay and Various Devices
Limited time offer, ends 11/07
$91.55
Free Shipping