3-Channel USB to Serial Relay Module with CH340 Control

USB serial port control relay, serial port control, long life, overcurrent protection USB serial port control relay, newly upgraded advanced version with 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 and off. There is no voltage output at the load end of the module When there is no voltage in the relay coil, the relay remains disengaged and the common terminal (COM) is connected to the normally closed terminal (NC). When voltage is applied, the relay engages and the common terminal (COM) connects 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: different production batches may have slight variations in appearance, color, and printed characters, which do 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 accessories are not included Note: lighting effects and display differences may cause slight color variation between the image and the actual item. Measurement error allowed is +/- 1-3cm