This relay module is 5V active low. Relay output maximum contact is AC250V 10A and DC30V 10A.
Standard interface can be directly connected with microcontrollers.
Working status indicator lights are conducive to the safe use
4-channel relay interface board, which can be controlled directly by a wide range of microcontrollers such as Arduino, AVR, PIC, ARM, PLC, etc. It is also able to control various appliances and other equipments with large current.
Widely used for all MCU control, industrial sector, PLC control, smart home control. For a complete data sheet for this relay board, please download it from: http://dwz.win/UhW