4 csatornás relé modul 4 csatornás relé vezérlőkártya optocsatolóval. Relé kimenet 4 utas relé modul a számára
4 channel relay module 4-channel relay control board with optocoupler. Relay Output 4 way relay module for
  4-channel   relay   output modules ,   relay   output contacts   250A 10A.   Input   IN1,   IN2,   IN3 , IN4,   the signal line   LOW   effective.   VCC, GND   power input,   can   relay   a separate   power   supply   relay   power   input of   JD- VCC .
Uses:
1, support all MCU control.
2, the industrial sector;
3, PLC control
4, smart home control;
580048776 - a a