QUINT-PS’1AC’24DC’5 Safety-Reliable DC Power for Critical Sites

QUINT-PS’1AC’24DC’5 Safety-Reliable DC Power for Critical Control Sites

The Phoenix Contact QUINT-PS’1AC’24DC’5 is a single-phase, 24 VDC, 5 A DIN-rail mounted power supply engineered for continuous, uninterrupted operation in the most demanding industrial control environments. Designed to meet the rigorous requirements of critical safety loops, heavy-duty control cabinets, and process-critical automation architectures, this unit delivers stable, regulated DC power even under severe electrical stress — including high electromagnetic interference (EMI), mains voltage fluctuations, inrush surges, and load transients.

In industries where an unplanned power interruption can trigger a safety incident, production loss, or equipment damage, the QUINT-PS’1AC’24DC’5 provides the power backbone that keeps control systems alive. Its active power boost capability — delivering up to 200% rated current for 12 ms — ensures reliable startup of capacitive loads and motor-driven actuators without nuisance tripping. The integrated SFB (Selective Fuse Breaking) technology enables downstream fuse coordination, allowing fault isolation without cascading shutdowns across the control cabinet.

For facilities operating PLCs such as the Siemens S7-300 or S7-400 series, or distributed I/O systems like the Phoenix Contact Axioline F or Inline series, stable 24 VDC supply is non-negotiable. The QUINT-PS’1AC’24DC’5 pairs directly with these control platforms, ensuring that CPU modules, digital output cards, and safety relay modules — including the PSR-SCP series safety relays — receive clean, regulated power free from ripple or dropout events that could cause spurious trips or PLC faults.

Safety Reliability Table

Control Cabinet Risk Reduction Strategy

A robust control cabinet is only as reliable as its weakest power link. In high-stakes installations — such as emergency shutdown (ESD) panels, fire and gas detection cabinets, or motor control centers (MCCs) — the QUINT-PS’1AC’24DC’5 serves as the primary 24 VDC source for the entire safety instrumented system (SIS) architecture.

When paired with the Phoenix Contact QUINT-BUFFER/24DC/40 capacitor module, the system achieves bridging times of up to 40 ms during mains interruptions, preventing nuisance PLC resets during brief grid disturbances — a common cause of unplanned shutdowns in facilities with unstable utility feeds. For applications requiring redundant power, the QUINT-DIODE/40AC/2X20/1X40 redundancy module enables seamless parallel operation of two QUINT-PS units, eliminating the power supply as a single point of failure.

In cabinets housing Rockwell Automation ControlLogix or CompactLogix PLCs, the QUINT-PS’1AC’24DC’5 provides the stable 24 VDC rail required by 1756-series I/O modules and 1734 POINT I/O distributed racks. Its low output ripple (< 50 mV peak-to-peak) prevents false triggering of analog input modules and ensures accurate 4–20 mA signal transmission across long field cable runs.

For communication-intensive cabinets integrating PROFIBUS DP, PROFINET, or Modbus TCP networks, clean DC power is critical. Signal distortion caused by power supply ripple or ground loops can corrupt fieldbus frames, leading to communication timeouts and controller faults. The QUINT-PS’1AC’24DC’5, combined with Phoenix Contact TRABTECH surge protection devices such as the PT 2X2-24DC-ST series, provides a complete EMI and transient suppression solution for both power and signal lines.

In high-vibration environments — such as offshore platforms, mining conveyors, or steel mill drives — the unit’s robust DIN-rail locking mechanism and conformal-coated PCB option ensure continued operation without contact loosening or moisture ingress. Supplementing the power supply with Phoenix Contact CLIPLINE complete terminal blocks (such as the ST 2.5 series) and HEAVYCON industrial connectors further secures the wiring integrity of the entire control cabinet assembly.

For safety relay circuits using the PSR-SCP-24DC/ESD/4X1/30 emergency stop relay or the PSR-PC50/IEC/UNI/2X1/1X2 safety relay, the QUINT-PS’1AC’24DC’5 delivers the stable supply voltage required for reliable coil energization and contact monitoring — preventing false safe-state activations caused by voltage sag during high-load switching events.

Critical Industrial Safety Applications

The QUINT-PS’1AC’24DC’5 is deployed across a wide range of critical industrial sectors where control system reliability directly impacts personnel safety, environmental compliance, and production continuity.

Petrochemical and Refinery Plants: In ATEX Zone 2 classified areas and associated safe-area control rooms, this power supply feeds the 24 VDC bus for flame and gas detectors, solenoid valve positioners, and ESD logic solvers. Its ability to maintain output stability during mains brownouts — common in facilities with large motor starting loads — prevents spurious ESD activations that could trigger costly process shutdowns.

Power Generation and Substation Automation: In 110 kV and 220 kV substation relay panels, the QUINT-PS’1AC’24DC’5 powers protection relay auxiliary circuits, RTU communication modules, and SCADA I/O interfaces. Its high EMI immunity (tested to IEC 61000-4-5 Level 4 surge) ensures continued operation during switching transients and lightning-induced surges on overhead transmission lines.

Mining and Mineral Processing: Longwall mining systems, conveyor drive control panels, and ventilation fan controllers operate in environments with extreme dust loading, humidity cycling, and mechanical vibration. The QUINT-PS’1AC’24DC’5’s wide operating temperature range (-25 °C to +70 °C) and IP20 enclosure rating (suitable for installation in sealed control cabinets) make it a reliable choice for these harsh underground and surface mining applications.

Water and Wastewater Treatment: SCADA-controlled pump stations, chemical dosing systems, and UV disinfection panels require 24/7 power supply availability. The QUINT-PS’1AC’24DC’5’s high MTBF (> 500,000 hours) and active monitoring output (signal contact for remote fault detection) enable predictive maintenance strategies that minimize unplanned downtime at unmanned remote pump stations.

Metallurgy and Steel Production: Electric arc furnace (EAF) control systems, continuous casting machine PLCs, and rolling mill drive controllers generate severe harmonic distortion and voltage fluctuations on the local power network. The QUINT-PS’1AC’24DC’5’s active power factor correction (PFC) and wide input voltage range (85–264 VAC) allow it to operate reliably even on heavily distorted industrial power networks without derating.

Port and Marine Applications: Ship-to-shore crane control panels, vessel automation systems, and port terminal SCADA cabinets require power supplies certified to marine standards. The QUINT-PS’1AC’24DC’5 holds DNV and GL marine certifications, making it suitable for installation in engine room control panels and bridge automation systems aboard commercial vessels.

Safety and Quality FAQ

Q1: What does the 12-month warranty cover for the QUINT-PS’1AC’24DC’5?
The 12-month warranty covers all manufacturing defects, component failures, and functional malfunctions arising under normal operating conditions as specified in the product datasheet. It includes free repair or replacement of the defective unit. Damage caused by incorrect installation, overvoltage beyond rated input limits, or physical mishandling is excluded. Warranty claims are processed with full traceability documentation upon request.

Q2: What pre-shipment testing is performed on each unit?
Every QUINT-PS’1AC’24DC’5 unit undergoes full functional testing prior to shipment, including output voltage accuracy verification, load regulation testing at 25%, 50%, and 100% rated load, input surge withstand testing, and SFB boost function verification. Units are shipped with test records available upon request for quality-critical procurement processes.

Q3: Is the QUINT-PS’1AC’24DC’5 compatible with my existing Phoenix Contact QUINT-PS generation cabinet?
Yes. The QUINT-PS’1AC’24DC’5 is dimensionally and electrically compatible with the standard QUINT-PS product family. It mounts on standard EN 60715 TH35 DIN rail and uses the same terminal pitch as other QUINT-PS units, allowing direct replacement without cabinet re-wiring. It is also compatible with QUINT-BUFFER capacitor modules and QUINT-DIODE redundancy modules from the same product family.

Q4: Can long-term supply and replacement support be guaranteed for this model?
Yes. We maintain dedicated stock of the QUINT-PS’1AC’24DC’5 to support long-term spare parts programs for installed base equipment. For facilities with multi-year maintenance contracts or planned turnaround schedules, we offer reserved stock arrangements and advance replacement agreements to ensure parts availability without lead-time risk. Contact our team to discuss your specific supply continuity requirements.