Phoenix Contact QUINT4-PS/24DC/24DC/20/PT DC/DC Converter

QUINT4-PS/24DC/24DC/20/PT: 24 V to 24 V DC converter with 20 A output

The QUINT4-PS/24DC/24DC/20/PT is a DIN-rail DC/DC converter from the fourth generation of QUINT POWER. It takes a 24 V DC input and produces a regulated, isolated 24 V DC output of 20 A, which is 480 W of continuous power. Typical roles are decoupling a sensitive control supply from a noisy battery or main bus, regenerating a stable voltage after a long cable, and separating two circuits that must not share a common ground path. Seven Star LLC supplies the QUINT4-PS/24DC/24DC/20/PT in Oman and the GCC as an independent supplier in Muscat.

Reading the name: QUINT4 is the generation, PS means power supply, 24DC/24DC means 24 V DC in and 24 V DC out, 20 the nominal output current in amperes, and PT the push-in terminal connection variant listed with the order number 2910121.

Technical specifications of the QUINT4-PS/24DC/24DC/20/PT

How the QUINT4-PS/24DC/24DC/20/PT converts and protects

A DC/DC converter works by chopping the input voltage at high frequency, passing the energy through a transformer and rectifying it again. The result is an output that is electrically separated from the input and held within a narrow voltage band even when the input moves across the wide range of 24 V DC minus 25 % to plus 40 %. The converter reaches typical efficiency of 94.7 %, so at full load only a few watts are lost as heat.

The U/I Advanced characteristic shapes how the output behaves at overload. Up to 25 A static boost is available for loads that draw extra current, and a dynamic boost of 30 A for 5 seconds can start large capacitive loads or trip downstream protective devices selectively. This SFB (Selective Fuse Breaking) behaviour is the reason the device is chosen for circuits protected by ordinary miniature breakers.

Where the QUINT4-PS/24DC/24DC/20/PT fits in a power system

Use this converter when a 24 V DC bus must be turned into a clean, isolated 24 V DC supply for a separate group of loads. Examples are a battery-backed bus feeding a PLC cabinet, a remote I/O station where the supply cable is long, or analogue circuits that need a quiet rail. The 12 V version of the same family, the QUINT4-PS/24DC/12DC/8/PT, serves 12 V equipment from a 24 V bus.

Series and parallel connection allow higher voltage or higher capacity, and redundancy can be built using the parallel function with a decoupling module. Always check the input current of 27 A, which is higher than the output current because the input voltage is the same: the circuit breaker upstream must be sized for it.

Selection and ordering checklist for the QUINT4-PS/24DC/24DC/20/PT

• Input bus voltage and its tolerance against the 24 V DC -25 % to +40 % range.
• Load current, including inrush and any boost demand, against 20 A nominal.
• Upstream breaker for 27 A input current (the page recommends 50 A, characteristic B, C or similar).
• Isolation requirement between input and output.
• Ambient temperature and derating above 60 °C.
• Need for series or parallel operation and decoupling.
• Mounting orientation and clearance in the cabinet.

Installation, commissioning and maintenance of the QUINT4-PS/24DC/24DC/20/PT

Mount on a 35 mm DIN rail with the clearances given on the data sheet so that convection cooling is not blocked. Connect input and output with conductors of 0.2 to 6 mm² (rigid or flexible); ferrules of up to 4 mm² are acceptable. Respect polarity on both sides, since the unit is isolated but the connections are still DC.

On commissioning, check the input voltage under load, set the output voltage if needed up to 29.5 V, and watch the signalling LEDs. The device can output signals on output current and voltage status. In maintenance, clean dust from the heat-sink openings and check terminals, as dust in hot cabinets reduces cooling.

Typical applications in Oman and the GCC

In Oman and the GCC, 24 V DC buses fed from batteries and chargers are common in substations, pumping stations and remote wellhead or pipeline installations. The QUINT4-PS/24DC/24DC/20/PT can regenerate a stable 24 V after voltage drops in long cables, which is typical in large plants, and it can isolate instrument loops from noisy motor-control buses.

Operating range to 70 °C with derating suits outdoor kiosks and rooftop panels, and the wide input range accepts the voltage swings of a battery system during charge and discharge.

Comparison with related devices

Information to send with an RFQ for the QUINT4-PS/24DC/24DC/20/PT

• Part number QUINT4-PS/24DC/24DC/20/PT and quantity.
• Input bus voltage range and source type.
• Load current and starting behaviour.
• Ambient temperature and enclosure type.
• Redundancy requirement.

Documents and quotation

Send us the part number QUINT4-PS/24DC/24DC/20/PT and the quantity you need, and we will confirm which official documents are available for this item. Seven Star LLC is an independent supplier in Muscat and quotes for projects across Oman and the GCC; we do not act on behalf of the manufacturer.

Please also tell us the delivery location and the project timeline so that availability can be checked before you commit to a schedule.