Phoenix Contact QUINT4-PS/24DC/12DC/8/PT DC/DC Converter

QUINT4-PS/24DC/12DC/8/PT: 24 V to 12 V DC step-down converter

The QUINT4-PS/24DC/12DC/8/PT is a DIN-rail DC/DC converter that steps a 24 V DC bus down to a regulated 12 V DC output of 8 A, which is 96 W. It is the converter to choose when part of a 24 V system includes 12 V equipment such as radios, cameras, signal lamps, small instruments or telemetry units. Seven Star LLC supplies the QUINT4-PS/24DC/12DC/8/PT in Oman and the GCC as an independent supplier in Muscat.

In the name, 24DC/12DC shows the input and output voltage, 8 is the nominal output current and PT the push-in terminals. The order number is 2910122.

Technical specifications of the QUINT4-PS/24DC/12DC/8/PT

How the QUINT4-PS/24DC/12DC/8/PT steps the voltage down

The converter is a switch-mode design, so the step-down from 24 V to 12 V does not burn the difference as heat as a linear regulator would. Efficiency is typically 91 %, so for 96 W output the converter dissipates less than 9 W. The output is electrically isolated from the input, which helps when the 12 V equipment is mounted on a different earth reference.

The U/I Advanced output characteristic gives a static boost of 10 A (120 W) for loads that draw more current for a while, and a dynamic boost of 16 A (192 W) for 5 seconds, useful when 12 V loads include motors or capacitive inputs that start with a high current.

Where the QUINT4-PS/24DC/12DC/8/PT fits

This unit is a companion to a 24 V control supply, for example the QUINT4-PS/1AC/24DC/20 or a TRIO supply. From the 24 V bus, the converter creates a second voltage rail without a second mains connection. This reduces cable runs and avoids separate chargers when site 12 V loads are few.

For loads that need 24 V from a 24 V bus but with isolation, the bigger QUINT4-PS/24DC/24DC/20/PT is the relevant model. Use the 12 V model only for 12 V loads; do not use the adjustment range to feed a different voltage standard.

Selection and ordering checklist for the QUINT4-PS/24DC/12DC/8/PT

• Total 12 V load current against 8 A nominal, with boost if needed.
• Input bus voltage stability (nominal 24 V DC).
• Output setting needed within 12 to 15 V DC.
• Parallel use for redundancy.
• Derating at high cabinet temperature.
• Space and orientation on the rail.

Installation, commissioning and maintenance of the QUINT4-PS/24DC/12DC/8/PT

Mount on the DIN rail, leave the cooling clearances shown in the data sheet and connect input and output with correctly sized conductors. After switching on, measure the output at the load rather than at the converter to include cable drop; compensate by raising the setting a little if the cable is long.

Periodic checks include terminal tightness, dust and the status LED. Keep a spare when the 12 V load is critical, as the unit is not repairable on site.

Typical applications in Oman and the GCC

In Oman and the GCC, 12 V equipment is often added to existing 24 V plants: CCTV and access control at remote stations, radio and telemetry links, and beacon lamps. The QUINT4-PS/24DC/12DC/8/PT allows these items to share the plant battery system, which already has backup, instead of adding a new supply.

The ability to withstand wide input swings is helpful on battery-backed systems in solar-powered stations and pipeline monitoring sites.

When sizing, add the 12 V loads at their worst-case current, then compare with the 8 A rating and the 10 A static boost. Remember that the 24 V input current rises with the output power: at full 96 W load and about 91 % efficiency the converter takes roughly 105 W from the bus, so the upstream breaker and the battery or charger must have that reserve. Cable drop on the 12 V side matters more than on 24 V, so keep the runs short or use larger conductors.

Comparison with related devices

Information to send with an RFQ for the QUINT4-PS/24DC/12DC/8/PT

• Part number QUINT4-PS/24DC/12DC/8/PT and quantity.
• Source 24 V bus type.
• 12 V load type and current.
• Ambient temperature.

Site conditions in Oman for the QUINT4-PS/24DC/12DC/8/PT

Electrical rooms and outdoor panels in the Gulf often operate well above the 25 °C reference temperature used in many catalogues. Before you finalise the QUINT4-PS/24DC/12DC/8/PT, compare the expected panel temperature with the operating range and any output derating stated in the manufacturer documentation, and leave the recommended clearance above and below the device for convection. Supply quality also varies between sites, so confirm the input voltage range, frequency and any requirements for protection on the supply side.

Where the device feeds or monitors critical loads, plan how faults will be signalled to the control system and how a replacement can be installed quickly. Keeping one spare QUINT4-PS/24DC/12DC/8/PT per site and recording its settings helps maintenance teams in Oman restore service with minimum downtime.

Documents and quotation

Send us the part number QUINT4-PS/24DC/12DC/8/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.