Phoenix Contact QUINT-PS/1AC/48DC/10 2866682 DIN-Rail Power Supply – QUINT Series

Phoenix Contact QUINT-PS/1AC/48DC/10 2866682 — 480 W Single-Phase DIN-Rail Power Supply for Industrial Control Systems

The Phoenix Contact QUINT-PS/1AC/48DC/10 (Part No. 2866682) is a 480 W, single-phase switched-mode power supply designed for continuous-duty operation in industrial control panels, process automation cabinets, and infrastructure enclosures. It converts a wide-range AC input (85–264 VAC) to a regulated 48 VDC output at 10 A nominal, with an adjustable output range of 45–56 VDC to accommodate telecom and PoE bus requirements. The unit mounts on standard EN 60715 TH35 DIN rail and occupies a 60 mm panel width — a critical dimension in high-density enclosure layouts where every millimetre of horizontal rail space is budgeted.

Within a control loop, this power supply functions as the primary energy conversion node for the 48 V distribution bus. Its role extends beyond simple rectification: the integrated QUINT BOOST circuit actively monitors load current and injects up to 150% rated current (15 A) for a defined 4-second window, providing the fault-clearing energy required to trip downstream miniature circuit breakers (MCBs) sized to IEC 60898. Without this capability, a conventional PSU operating in constant-current limiting mode would fail to deliver sufficient fault energy to trip a B- or C-curve MCB, leaving a downstream short circuit uncleared and the entire 48 V bus collapsed. The QUINT-PS/1AC/48DC/10 eliminates this failure mode by design.

Real-time Stock & RFQ: [email protected] | WhatsApp: +86 18359268345

Technical Parameters

Hardware Logical Analysis

The QUINT-PS/1AC/48DC/10 is built on a full-bridge LLC resonant topology — a design choice that directly addresses the two dominant loss mechanisms in high-power DIN-rail supplies: switching losses and magnetic core saturation. The LLC resonant tank (inductor-inductor-capacitor) operates at the resonant frequency under nominal load, achieving zero-voltage switching (ZVS) on the primary MOSFETs and zero-current switching (ZCS) on the secondary rectifier diodes. This eliminates the hard-switching transients that generate both conducted and radiated EMI, reducing the need for bulky input-side EMI filters and contributing to the unit’s 60 mm form factor.

The active Power Factor Correction (PFC) stage precedes the LLC converter. A boost PFC pre-regulator shapes the input current waveform to follow the AC voltage sinusoid, achieving a power factor of ≥ 0.99 at full load. This is not merely a regulatory compliance measure — it directly reduces the RMS current drawn from the supply transformer or UPS, lowering I²R losses in the upstream wiring and reducing the kVA rating required from the facility’s power infrastructure.

The QUINT BOOST mechanism is implemented via a dedicated current-sense and gate-drive circuit that bypasses the standard constant-current limiting threshold for a timed 4-second window. The firmware-controlled timer ensures the boost interval is long enough to trip a C-curve MCB at 10× rated current (per IEC 60898 tripping characteristic) while preventing thermal damage to the output stage. After the boost window expires, the unit transitions to constant-current limiting at 105% of nominal, protecting itself from sustained overload while maintaining partial bus voltage for non-faulted branches.

EMC immunity is addressed at the hardware level through a multi-stage approach: a common-mode choke and X/Y capacitor network at the AC input attenuates conducted emissions per EN 55011 Class B; the LLC topology’s inherent soft-switching reduces radiated emissions; and the output stage includes a differential-mode LC filter that holds output ripple below 50 mV peak-to-peak across the full load range. The unit meets EN 61000-6-2 immunity requirements, including 2 kV surge (EN 61000-4-5), 4 kV EFT/burst (EN 61000-4-4), and 10 V/m radiated field immunity (EN 61000-4-3) — the standard test suite for industrial environments with variable-frequency drives, contactors, and high-current switching loads in close proximity.

The DC OK signalling relay uses a potential-free contact rated at 250 VAC / 1 A, allowing direct wiring into a PLC digital input module without an interposing relay. The relay de-energises when output voltage drops below approximately 90% of the set point, providing an early-warning signal that can trigger a SCADA alarm or initiate a controlled shutdown sequence before the output collapses entirely.

System Integration Benefits

• Deterministic fault clearance: The 150% BOOST current guarantees MCB tripping within the IEC 60898 instantaneous trip band, preventing sustained short-circuit conditions that would otherwise collapse the entire 48 V bus and cause unplanned process shutdowns.
• Wide-input universality: The 85–264 VAC input range eliminates the need for input voltage selection switches or external autotransformers when deploying machines across 100 V (Japan), 120 V (North America), 230 V (Europe), and 240 V (Australia/China) grid standards.
• Telecom bus compatibility: Output adjustability to 56 VDC allows the unit to serve as a primary supply for ETSI 300 132-2 compliant telecom equipment and IEEE 802.3bt PoE++ switches without an intermediate DC-DC converter stage.
• Predictive maintenance integration: The DC OK relay contact can be wired to a PLC counter or SCADA historian to log the number of overload events, providing a maintenance trigger based on actual stress history rather than fixed calendar intervals.
• Thermal headroom at elevated ambient: Full 10 A output is sustained to +60 °C ambient; linear derating to 6 A at +70 °C allows the unit to operate in non-air-conditioned enclosures in tropical climates without forced cooling, reducing panel complexity and fan maintenance overhead.
• Parallel redundancy readiness: When paired with a Phoenix Contact QUINT-ORING module, two QUINT-PS/1AC/48DC/10 units form a true N+1 redundant supply with active MOSFET ORing — no diode voltage drop, no heat dissipation penalty, and automatic load transfer in < 1 ms on primary failure.
• High MTBF for lifecycle planning: The > 500,000-hour MTBF figure (IEC 61709 methodology, 40 °C ground fixed) translates to a predicted mean time between failures of approximately 57 years at continuous operation — a figure that supports 20-year plant lifecycle planning without scheduled PSU replacement.
• Reduced upstream infrastructure cost: The ≥ 0.99 power factor at full load means the apparent power drawn from the facility supply is essentially equal to the real power consumed. For a 480 W load, this reduces the required UPS kVA rating from approximately 600 VA (at PF 0.8) to 485 VA — a measurable cost saving when sizing UPS systems for large panel rooms.

Quality Assurance & Global Logistics

Every unit of the Phoenix Contact QUINT-PS/1AC/48DC/10 2866682 supplied by siemensplc.com is sourced from authorised Phoenix Contact distribution channels or factory-certified inventory. Phoenix Contact’s manufacturing facilities operate under ISO 9001:2015 quality management systems, and each QUINT series power supply undergoes 100% end-of-line electrical testing at the factory — including output voltage accuracy, current limiting threshold, BOOST function verification, and signalling relay continuity — before leaving the production line.

Upon receipt at our Xiamen, China facility, units are subject to incoming inspection: visual verification of Phoenix Contact labelling, date code, and country-of-origin markings; packaging integrity check; and spot functional testing on a calibrated DC load bank. Units are stored in ESD-controlled, humidity-monitored warehousing and dispatched in original anti-static packaging with desiccant and humidity indicator cards.

Logistics from Xiamen reach major industrial hubs on the following typical transit schedules: Hong Kong and Shenzhen — same day or next day; Singapore, South Korea, Japan — 2–4 business days via air freight; Europe (Germany, Netherlands, UK) — 5–7 business days via DHL Express or FedEx International Priority; North America (USA, Canada) — 5–8 business days; Middle East and Southeast Asia — 3–5 business days. For project-critical shipments, same-day dispatch is available for orders confirmed before 14:00 CST. Full export documentation — commercial invoice, packing list, certificate of origin, and MSDS where required — is provided as standard. All units are covered by a 12-month warranty from the date of dispatch.

Contact Information

Email: [email protected]
WhatsApp: +86 18359268345
Web: siemensplc.com
Location: Xiamen, China
© 2026 siemensplc.com. All rights reserved.