Harmony Control relay functions
Monitoring
Control relays monitor physical and electrical values. They measure variable signals
such as phase (presence, sequence and symmetry), voltage, current, and
frequency. They also control liquid levels and process operating rates.
Informing
Control device outputs provide users with electrical information. In addition, setting
faults are signaled by simultaneous flashing of all LEDs.
Protecting
Integrated in the control circuits of automated systems, they enable automatic
shutdown management and provide fault information, thus protecting the equipment.
Managing
When the power is switched on, the control relays are inhibited to enable correct
measurement circuit setting. The outputs operate with positive logic, the contact or
contacts being closed under normal conditions and opening as soon as a fault or
power supply loss is detected.
Commissioning
When the diagnostic button is used, the downstream circuit can be closed
immediately without sending a fault input signal to the relays. This shortens the
testing time during commissioning and troubleshooting.
