The SMR4890-6 is a solid-state relay for use a number of fault condition alarms in a standard package, with output rating 90A. An LED indicator provides status information and an electronic output can be connected to the control system for continuous status reporting. The alarm output on an SMR-6 monitoring SSR has 2 options: normally open (PNP) or normally closed (NPN), with sinking current capabilities of up to 100mA. I/O isolation voltage is 4000Vrms.