Phoenix Contact QUINT-PS Series Power Supplies QUINT-PS/1AC/24DC/20

Technical Dossier

Product Details And Specifications

Phoenix Contact QUINT-PS Series Technical Notes

The Phoenix Contact QUINT-PS series represents one of the most widely deployed families of DIN-rail mounted industrial power supply units in global heavy industry. Installed across chemical processing plants, nuclear power facilities, oil refineries, offshore platforms, and large-scale manufacturing automation systems, the QUINT-PS line has established a dominant position as the reference standard for 24 VDC bus power in safety-critical environments. Its SFB (Selective Fuse Breaking) technology, active current limiting, and preventive function monitoring distinguish it from conventional SELV power supplies, making it the preferred choice for system integrators working under IEC 61508 and IEC 62061 functional safety frameworks.

The series covers input configurations from single-phase AC (1AC) to three-phase AC (3AC) and DC input variants, with output current ratings from 5 A to 40 A at 24 VDC, and specialized variants for 12 VDC, 48 VDC, and 110 VDC output rails. The QUINT-PS platform is engineered for continuous operation at ambient temperatures up to 60°C with derating, and carries approvals including UL 508, GL, ATEX Zone 2, and cULus.

The Evolution of QUINT-PS Architecture

The QUINT-PS series was introduced by Phoenix Contact in the early 2000s as a successor to the MINI-PS and TRIO-PS families, targeting applications that required active load management beyond passive current limiting. The first-generation QUINT-PS units introduced the SFB (Selective Fuse Breaking) concept, enabling the power supply to deliver up to 200% of rated current for 12 ms to selectively blow downstream branch fuses without tripping the upstream breaker — a critical capability in multi-branch 24 VDC distribution panels.

The second-generation QUINT-PS introduced the POWER BOOST function, extending the overcurrent delivery window and adding a front-panel diagnostic LED matrix for load state, output voltage, and preventive maintenance signaling. This generation also introduced the first variants with integrated battery charging outputs (QUINT-BUFFER and QUINT-UPS derivatives).

Compatibility note: QUINT-PS and QUINT4-PS units share the same DIN-rail footprint and terminal pitch for most current ratings, but firmware-based features (IO-Link, display) are not backward-compatible. Replacement of a QUINT-PS with a QUINT4-PS in an existing panel requires no mechanical modification but does require updated documentation.

QUINT-PS Full Catalog & Functionalities (SKU List)

The following SKUs represent the core QUINT-PS series product range, organized by input configuration and output rating. Each entry reflects a distinct catalog item with verified Phoenix Contact part number structure.

Single-Phase AC Input (1AC) — 24 VDC Output

• QUINT-PS/1AC/24DC/5: Single-phase input, 24 VDC / 5 A output, 120 W, SFB technology, 45 mm width
• QUINT-PS/1AC/24DC/10: Single-phase input, 24 VDC / 10 A output, 240 W, POWER BOOST to 20 A peak
• QUINT-PS/1AC/24DC/20: Single-phase input, 24 VDC / 20 A output, 480 W, SFB + POWER BOOST, 70 mm width — this listing
• QUINT-PS/1AC/24DC/40: Single-phase input, 24 VDC / 40 A output, 960 W, parallel operation capable

Three-Phase AC Input (3AC) — 24 VDC Output

• QUINT-PS/3AC/24DC/10: Three-phase 400–500 VAC input, 24 VDC / 10 A, 240 W, phase-loss detection
• QUINT-PS/3AC/24DC/20: Three-phase input, 24 VDC / 20 A, 480 W, wide-range input 340–550 VAC
• QUINT-PS/3AC/24DC/40: Three-phase input, 24 VDC / 40 A, 960 W, redundancy-ready

DC Input Variants

• QUINT-PS/1AC/12DC/10: Single-phase input, 12 VDC / 10 A output, for 12 V bus systems
• QUINT-PS/1AC/48DC/5: Single-phase input, 48 VDC / 5 A output, telecom and SCADA rail applications
• QUINT-PS/1AC/24DC/20/CO: 24 VDC / 20 A with integrated relay contact output for remote fault signaling

UPS / Buffer / Redundancy Derivatives

• QUINT-BUFFER/24DC/24DC/40: DC-input buffer module, 40 A, bridges mains failure up to 200 ms
• QUINT-UPS/24DC/24DC/20: Uninterruptible power supply module, 20 A, battery management integrated
• QUINT-DIODE/40AC/24DC/2X20: Redundancy module, ORing diode, 2 × 20 A inputs, decoupled parallel feeds
• QUINT-PS/1AC/24DC/20/PT: 24 VDC / 20 A with integrated power terminal for direct busbar connection
• QUINT4-PS/1AC/24DC/20: Fourth-generation successor, IO-Link monitoring, 95.5% efficiency, direct replacement for QUINT-PS/1AC/24DC/20

Quality Control for the QUINT-PS Range

QUINT-PS units incorporate active power electronics including PFC (Power Factor Correction) stages, SFB output circuits, and in UPS variants, battery charge management ICs. Standard visual inspection and continuity testing are insufficient for this class of power supply. DriveKNMS applies the following test protocol to all QUINT-PS units processed through its facility:

• Full-load burn-in at rated output current (20 A for QUINT-PS/1AC/24DC/20) for a minimum of 2 hours at ambient temperature
• SFB function verification: output short-circuit applied, peak current measured and confirmed within 200% ± 10% of rated current for the specified 12 ms window
• POWER BOOST verification: sustained overload at 125% rated current, boost duration measured against datasheet specification
• Output voltage regulation check across 10%, 50%, and 100% load steps
• Input voltage range sweep: 85 VAC to 264 VAC for 1AC variants; 340 VAC to 550 VAC for 3AC variants
• Signaling output verification: OK relay contact continuity confirmed under fault and normal conditions
• Thermal imaging at full load to identify hot-spot anomalies in capacitor banks and transformer windings
• Final calibration record issued with each unit, traceable to test bench serial number and date