The Solitron Series has been expanded to include the RJCS Series current monitoring solid-state relays. These microprocessor-controlled relays are capable of switching 50-A single-phase AC loads at up to 660 VAC when controlled by a 4-32 VDC signal. Their internal current sensing circuitry monitors and reacts to a number of load failure conditions. The RJCS’s alarm functions can be set locally or remotely from a standard PLC. Internal over temperature and over current protection is standard. The RJCS units are available with either NPN or PNP normally open or normally closed alarm outputs. It has an integrated heat sink and snaps to a DIN rail. The RJCS units can monitor and report locally (LED) and remotely (PLC) and react to line failures. Partial or complete load failure can be set to the desired full load current locally by pressing a “teach” membrane button or remotely by sending a signal from PLC controller. A time delay for a load alarm can be adjusted from 2-40 sec by a build-in potentiometer. Once the load is switched on, the RJCS will monitor load current and if it drops more than 13 percent below set point and for longer than preset delay time, it will trigger and open collector alarm and switch-off the load. The units will not switch on the load if no voltage is detected on the line. They monitor their internal temperature and will switch off the load if allowed temperature is exceeded. Undercurrent and overcurrent during “teach” procedure — if less than 84 percent of minimum teach current or more than maximum load current is applied during “teach” process — will trigger an alarm. The units will detect thyristor circuit condition and disconnect the load. The RJCS solid-state relays are a compact, fully integrated, ready-to-use solution. Typical applications for RJCS relays are in plastics production, packaging, and food industries. In plastic and rubber machinery consistent temperature control is a key. The units can constantly monitor and ensure that all switched heaters are functioning 100 percent. Faulty heaters in packaging equipment such as baggers, shrink tunnels, and glue sealers can quickly cause a high number of defective packages. RJCS gives an immediate alarm when the heater current drops more than 13 percent from set point.