Model 520RD is a remote display for the Model 520CP-RJ or the Model 520CS-RJ. The Model 520RD mounts directly on the motor control panel door. It can be ordered in flush mount or surface mount packaging. The unit then plugs into the jack of the model 520CP-RJ or the model 520CS-RJ. by setting a "CT RATIO" selector switch, the Model 520RD will also display the true current. The 520RD displays the nine programmed set points, average of the three line currents, percent of current unbalance, any one of the three line currents, and the last fault.

The Model 520CP and Model 520CS settings cannot be changed at the Model 520RD. The 520RD's display function selection and CT ratio selection will not affect the operation of the Model 520CS or Model 520CP in any way. The Model 520RD is strictly a remote display unit.