Crydom SMR-6 Series Monitoring Solid State Relays Crydom SMR-6 series of monitoring solid state relays offer several fault condition alarms in a standard package, with output ratings from 25 A to 90 A at 60 V ac to 553 V ac. The SMR-6 intelligent SSR is constantly monitoring loss of voltage, open circuit load, damaged relay output and DC supply current. 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 100 mA. Features and Benefits System monitoring solid state relay Ratings from 25A to 90A at 60 V ac to 280 V ac DC control LED status indicators Alarm output signal Inverting or non-inverting input Normally open or normally closed alarm output