Modbus RTU Relay 16-channel module with RS485 interface - Waveshare 24921

A versatile module that allows you to control higher voltage devices such as 12V LED strips while simultaneously powering a microcontroller from 3.3V. The module integrates an LMR14203 converter and an N-channel MOSFET (PSMN7R0-100BS), allowing you to power the board at up to 12V and drive loads up to 10A, with additional protection features and LED indicators, making it ideal for projects requiring efficient power control. SparkFun COM-23979

4-channel switch module with a maximum voltage of 16 V and a current of 2 A based on a MOSFET transistor. It is controlled by digital inputs. It is equipped with a screw connection and status LEDs. Adafruit 5757

Extension module designed for home automation projects compatible with Raspberry Pi. The board is equipped with a 24 V 2 A relay, three buffer inputs, three sink outputs and three analog inputs with a working range up to 24 V. Pimoroni PIM487

Board with the WiFi ESP-12F (ESP8266) module and a 5 V relay. Equipped with an AC adapter

Module with 4 digital inputs, 4 outputs and 6 analog (current) inputs. It communicates via the RS485 interface and supports the Modbus RTU protocol. The board is enclosed in an industrial housing. Wellpro WP9038ADAM

The module with 2 relays is designed for the M5Stack sets. It allows you to control devices with an operating voltage of up to 250 V AC and a current of up to 8 A or a voltage of 28 V DC and a current of 8 A. M5Stack U131

Module with 4 SSR relays with a load of up to 3 A. The board is equipped with the ULN2003 system and communicates via a digital interface. Numato Lab SSRC40001-AC

Module with 2 relays controlled by the I2C interface. Each relay can switch currents up to 25 A at 12 to 280 V AC. SparkFun COM-16810

2-channel module with relays designed to work with the Raspberry Pi Pico. It can switch signals up to 250 V AC and 7 A or 30 V DC and 10 A. SB Components 21284

Switch module with a maximum voltage of 12 V and a current of 10 A based on a MOSFET transistor, controlled by a digital pin. It is equipped with a screw connection and a status LED. SparkFun SPX-19799

Module with 2 5 V relays with a maximum switching current of 2 A. It communicates via the USB interface and does not require an additional power supply. Numato Lab USBPOWRL001

The module with 4 relays is designed to work with Arduino. It allows you to control devices with operating parameters up to 250VAC/7A or 30VDC/10A. Seeed Studio 103030009

Industrial relay module controlled via RS485 interface with Modbus RTU protocol support, offering 8 outputs with maximum load of 10 A. Equipped with galvanic isolation, opto-isolation, TVS diodes and DIN mounting, it ensures safe and reliable operation in harsh industrial conditions. Thanks to functions such as flash-on/off, configurable RS485 address (1-255), signaling diodes and wide power supply range (7-36 V), the module is perfect for building automation and device control. Waveshare Modbus RTU Relay (B)

The 24 V relay module with adjustable delay time offers a practical solution for AC/DC load control in automation and electronics applications

Universal module supervised by the website, which can control both DC circuits as well as powered from 230 V mains. The states of digital inputs, relays and control buttons are presented on the website. AVTMOD05

Module with 16 relays and 8 GPIO pins and 8 analog inputs. It communicates via the RS485, USB or Ethernet interface and supports the Modbus RTU/TCP protocol. Numato Lab NLRM1001-A