Phoenix Contact Quint DC-DC converter power supplies

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Quint DC/DC converter power supplies equipped with selective fuse breaking (SFB) technology now have approvals by Germanischer Lloyd and they can be used in hazardous zones.

With SFB technology, faulty circuits are selectively shut down so that the fault is localised and important system components remain operational. With rated output currents of 5-20 A, these devices supply peak currents of 30-120 A for 12 ms to magnetically trip circuit breakers. The voltage converters operate with DC input voltages of between 18 and 32 VDC and the range is expanded to between 14 and 32 VDC during operation. Depending on the device type, potentiometers at the front of the device can be used to adjust the output voltage for the ranges 5-18, 18-29.5 and 30-56 VDC.

By boosting the voltage on long supply lines, the modules change the voltage level or compensate for loss-related voltage drops. Primary switched-mode switching devices have an internal intermediate circuit that serves as a filter so that, for instance, grounded circuits can be separated from non-grounded ones, or critical loads can be protected against voltage fluctuations.

Comprehensive diagnostics are provided by the constant monitoring of input and output voltages and currents. This preventive function monitors critical operating states and signals them to the control system via the active switched output or the isolated relay contact before faults occur in the plant or system.