USB serial port control relay, serial port control, long life, overcurrent protection USB serial port control relay, newly upgraded advanced version, features new optocoupler protection circuit for interference prevention and high-speed transmission The output terminal of the relay functions as an electronic switch to control circuit on/off states; there is no voltage output at the load end of the module When the relay coil has no voltage, the relay does not engage, and the common terminal (COM) connects to the normally closed terminal (NC); when voltage is applied, the relay engages, connecting the common terminal (COM) to the normally open terminal (NO) USB serial port control relay Relay path: 5V Power supply method: Type-C interface or pin header Control interface: Type-C interface or pin header Microcontroller chip: GD32F103C8T6 Baud rate: 115200bps LED indicator lights: power indicator and relay status indicator Circuit design: includes overcurrent protection and optocoupler protection Output type: relay common terminal, normally open terminal, normally closed terminal Load type: supports load up to 10A/30VDC or 10A/250VAC Product size: approximately 58x32mm Note: product appearance, color, and printed characters may vary slightly between batches, but will not affect functionality Color: as shown Material: PCB Type: DSTUR-T30 3 Channel Package contents: 1 x Serial Port Control Relay (Type C) 1 x Type-C Cable (50cm) 1 x 10Pin 2.54mm Female to Female Dupont Cable (20cm) The package includes only the items listed above; other products are not included Note: lighting reflections and display differences may cause slight variations in color representation between the image and the actual item; measurement error allowance is +/- 1-3cm