SIL 3-rated QUINT 10+ Power Supply

Phoenix Contact's QUINT POWER offers a single-device solution with a redundant overvoltage protection circuit, so it is approved for functional safety applications up to SIL 3. The strict safety requirements of SIL 3 are associated with a low probability that a system will fail to perform properly. Phoenix Contact has designed a fully loaded QUINT 10+ power supply with an integrated decoupling MOSFET to meet rigorous SIL 3 safety regulations without the need for any external components.

The QUINT 10+ power supply introduces a single conformally coated device solution with ATEX, IEC 61508, IEC 61511, and Class I Division 2 approvals, allowing the power supply to be mounted within potentially explosive areas (Zone 2). The safety function is to limit the output voltage to 30 V_DC. If the voltage rises above 30 V_DC, the device will switch off within 20 milliseconds, creating a safe state with no output voltage. Designed with an integrated decoupling MOSFET, the QUINT 10+ has a hardware fault tolerance (HFT) equal to 1.