Modul SSR 8 Channel Low Level Solid State Relay Module 240V 2A Products: 1, 5V solid state relays 240V 2A, output with resistive fuse 240V 2A. 2, the input power supply: 5V DC 3, the input control signal voltage: (0-2.5V low state relays ON) (3.3-5V state high relay OFF) 5, blue KF301 terminals to the control line is more convenient. Module Interface: Input section: DC +: positive power supply (according to the relay voltage supply) DC- : negative one CH1 - CH8 : 1 relay module signal triggering end (low to trigger active)