2-channel USB controlled relay module with serial communication

Information about this module is generated with the help of AI. The description may be incomplete, inaccurate, or subject to change.

LCUS-2 PLC USB Serial Control Relay Module is a two-channel relay board designed to control electrical loads through USB and serial communication. The board includes an onboard CH340 USB control chip, allowing the module to be connected to a computer and communicate through a virtual COM port.

The module has two separate relay outputs that can be controlled independently. The relays can be used to switch devices such as lamps, motors, pumps, valves and other electrical equipment within the specified relay contact ratings.

When connected to a Windows computer, the USB interface is detected as a serial COM port. Communication can for example be performed using a serial monitor in VS Code. A verified communication setting is 9600 baud, 8 data bits, no parity and 1 stop bit.

The relays are controlled using four-byte HEX commands. For relay 1, A0 01 01 A2 is used for ON and A0 01 00 A1 for OFF. For relay 2, A0 02 01 A3 is used for ON and A0 02 00 A2 for OFF. The final byte functions as a checksum and can be calculated from the first three bytes.

The board has LED indicators for power and relay status, making it easy to see when the module is active and which relay is switched on. The relays also include flyback diode protection for the inductive voltage generated by the relay coils.

LCUS-2 is suitable for PC control, automation, test equipment, hobby projects and other applications where two electrically isolated relay contacts need to be controlled from a USB-connected computer.

Facts.
Product series: LCUS-2
Relay channels: 2
USB control chip: CH340
Microcontroller: Onboard microcontroller
USB connection: USB
Computer interface: Serial COM port
Communication: Serial
Communication speed: 9600 baud
Data format: 8N1
Control method: Raw HEX bytes
Relay voltage: 5 V
Relay contacts: NO, NC and COM
Relay status indicator: LED
Power indicator: LED
Relay protection: Flyback diode
Relay 1 ON: A0 01 01 A2
Relay 1 OFF: A0 01 00 A1
Relay 2 ON: A0 02 01 A3
Relay 2 OFF: A0 02 00 A2
Command length: 4 bytes
Checksum: Sum of the first three bytes
USB status reading: Not identified
Applications: PC control, automation and test equipment

Included.
1 pc module.

About the product.
Weight: approx 32 gram.
Contact us if you have questions at info@pchbutik.se
Article no: 4041
Remaining stock quantity can be found under the Product details tab.
In our range since: 2026-10-12

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