Relays are being used as the interface between the two circuits at same or different potential to archive: Electrical Isolation between the controller and the load side. For Signal Multification For Signal amplification And to interface different potential Relays From 1Channel /2/4/8/16 nos. on one board Relays with 1/2/4 Changeover With/ Without fuse protection with / without fuse blown indication Relays with Socket or Directly soldered on PCB Available Coil Voltage is 24V,