Finder 3940 series masterinput solid state relay interface modules spst no finder 394000249024 the finder 394000249024 from the masterinput series of relay modules are optically isolated solid state relays which provide 2500v dielectric strength between input and output these modules have enough terminals to allow the full connection of input devices at the interface saving component cost time and panel space the supply voltage can be conveniently distributed through a jumper li