2866776 QUINT Series Power Supply (Industrial-Grade 24V DC Solution)

The 2866776 is a high-performance switched-mode power supply from Phoenix Contact's QUINT family, purpose-built for industrial control environments demanding consistent 24V DC power delivery. This DIN rail-mounted unit combines wide-range AC input flexibility with advanced protection circuitry, making it the backbone solution for PLC systems, distributed I/O networks, and automation control panels across manufacturing, infrastructure, and process industries.

Designed for system integrators and maintenance engineers managing critical automation infrastructure, this power supply addresses voltage fluctuation challenges, redundancy requirements, and space constraints in industrial enclosures. With 240W continuous power capacity and intelligent parallel operation capability, it ensures uninterrupted operation even in harsh electrical environments where grid stability cannot be guaranteed.

Key differentiators include Phoenix Contact's proprietary SFB (Selective Fuse Breaking) technology for diode-free redundancy, active power factor correction exceeding 0.95, and a proven MTBF rating surpassing 500,000 hours—delivering reliability that reduces unplanned downtime and maintenance costs in 24/7 production environments.

Core Features & Benefits

→ Universal Input Voltage Range (100-240V AC)
Eliminates the need for voltage-specific models across global installations. Automatically adapts to regional power standards from North America (120V) to Europe (230V) and industrial sites with unstable grid conditions, reducing inventory complexity and enabling standardized spare parts strategies.

✓ SFB Redundancy Technology
Enables N+1 parallel configurations without external decoupling diodes. Multiple units automatically share load current and provide seamless failover protection, ensuring zero-downtime operation for mission-critical control systems while simplifying cabinet wiring and reducing component costs.

→ 92%+ Energy Efficiency
Minimizes heat generation and energy waste compared to linear power supplies. Lower operating temperatures extend component lifespan, reduce cooling requirements in control cabinets, and contribute to sustainability goals by cutting electrical consumption in large-scale installations.

✓ Comprehensive Protection Suite
Integrated safeguards against overload (150% for 5 seconds), short circuit (hiccup mode with auto-recovery), overvoltage (33V DC cutoff), and thermal overload. Protects downstream equipment investment while maintaining system availability through intelligent fault management.

→ DC-OK Relay Contact
Provides real-time status feedback to SCADA systems and PLCs for predictive maintenance strategies. Early warning of power degradation enables proactive intervention before failures occur, supporting Industry 4.0 monitoring initiatives.

✓ Compact DIN Rail Design (125mm Height)
Optimizes vertical space utilization in crowded control cabinets. Standard 35mm rail mounting allows tool-free installation and hot-swapping during maintenance windows without disrupting adjacent components.

Application Scenarios

Manufacturing Automation & Robotics
Powers Siemens S7-1200/1500 PLCs, Allen-Bradley CompactLogix controllers, and distributed I/O modules in assembly lines, CNC machining centers, and robotic work cells. The wide temperature range (-25°C to +70°C) handles foundry environments and cold storage facilities where standard power supplies fail.

Water & Wastewater Treatment
Supplies reliable 24V DC to remote pump stations, valve actuators, and level sensors in SCADA networks. SFB redundancy ensures continuous operation during maintenance cycles, preventing overflow incidents and regulatory compliance violations in unmanned facilities.

Building Management Systems
Energizes HVAC controllers, access control panels, and fire alarm interfaces in commercial buildings. Active PFC reduces harmonic distortion that can interfere with sensitive building automation networks, while UL/cUL certifications streamline electrical inspections.

Material Handling & Logistics
Drives conveyor control systems, barcode scanners, and sortation equipment in distribution centers. Parallel operation capability supports modular expansion as throughput demands increase, avoiding costly system redesigns.

Renewable Energy & Microgrid Systems
Provides auxiliary power for solar inverter controls, battery management systems, and grid-tie protection relays. Wide input tolerance accommodates generator-backed power sources with voltage variations exceeding ±15%.

Technical Specifications & Selection Guide

Selection Criteria: Choose the 2866776 when your application requires 200-240W of 24V DC power with redundancy capability. For higher current demands (15-40A), consider Phoenix Contact's QUINT-PS/1AC/24DC/20 or /40 models. If DC input from battery systems is needed, specify QUINT-PS-DC variants. Verify that ambient temperatures remain below 60°C for full 10A output; derate by 2.5% per °C above 60°C up to 70°C maximum.

Extended Capabilities

IoT Integration & Remote Monitoring
The DC-OK relay contact (changeover contact rated 1A/250V AC) interfaces directly with PLC digital inputs or building management systems for real-time status monitoring. Integrate with Modbus RTU gateways or MQTT-enabled edge devices to enable cloud-based predictive maintenance dashboards tracking power supply health metrics.

Parallel Redundancy Configurations
Deploy 2-4 units in N+1 or N+2 architectures using SFB technology. Each unit automatically limits output current to its proportional share, with remaining units compensating instantly if one fails. No external ORing diodes required—reducing cabinet space, wiring complexity, and voltage drop losses.

Custom Output Voltage Adjustment
Fine-tune output voltage from 24V to 28V DC via front-accessible potentiometer to compensate for voltage drop in long cable runs or to meet specific equipment requirements. Adjustment range supports applications requiring 27V DC for legacy systems or 26V for optimal battery float charging.

Delivery & Service Assurance

Lead Time: Standard stock items ship within 2-3 business days. Custom configurations or bulk orders (10+ units) typically require 7-10 business days. Expedited shipping available for critical downtime situations.

Warranty: 12-month manufacturer warranty covering defects in materials and workmanship under normal operating conditions. Extended warranty programs available for OEM integrators and multi-site deployments.

Technical Support: Access to application engineers for system design consultation, load calculation assistance, and troubleshooting support via email (response within 24 hours) or phone during business hours. On-site commissioning support available for large-scale projects.

Documentation Package: Each unit includes installation manual, wiring diagrams, CE declaration of conformity, and UL certification documents. CAD models (STEP/DXF), 3D PDFs, and EPLAN macros available for download to streamline cabinet design workflows.

Frequently Asked Questions

What is the maximum cable length for maintaining voltage regulation at full load?
With 10A output current and ±3% regulation tolerance (±0.72V), use 1.5mm² (16 AWG) copper wire for runs up to 15 meters, or 2.5mm² (14 AWG) for distances up to 25 meters. For longer runs, increase wire gauge or adjust output voltage upward to compensate for resistive losses.

Can this power supply operate in marine or offshore environments?
Yes, the unit holds GL (Germanischer Lloyd) and DNV (Det Norske Veritas) marine certifications for shipboard and offshore platform installations. Conformal coating options are available for enhanced corrosion resistance in salt-spray environments—specify at time of order.

How does the unit perform during input voltage brownout conditions?
The power supply maintains regulated 24V DC output down to 85V AC input (at reduced load). Below 85V AC, the unit enters undervoltage lockout to prevent uncontrolled shutdown. Holdup time exceeds 20ms at full load, bridging typical grid transients without output interruption.

What is the recommended circuit breaker rating for input protection?
Use a 6A slow-blow (Type C or D curve) circuit breaker for 230V AC installations, or 10A for 120V AC systems. The 30A/3ms inrush current is within the tolerance of these ratings. For multiple units on shared circuits, apply diversity factors per NEC Article 430 guidelines.

Does the power supply support hot-swapping in redundant configurations?
Yes, when operating in parallel with SFB technology, individual units can be removed or inserted under load without disrupting output voltage. Ensure remaining units have sufficient capacity to handle total load current during the swap procedure.

What maintenance intervals are recommended for industrial environments?
Inspect terminal connections quarterly for tightness (torque to 0.5-0.6 Nm). Clean ventilation slots semi-annually in dusty environments. Electrolytic capacitors have a design life of 10+ years at rated temperature; consider preventive replacement after 8 years in critical applications to maintain MTBF targets.

Optimize Your Power Architecture

Ready to eliminate voltage instability and downtime risks in your control systems? The 2866776 QUINT power supply delivers the reliability and flexibility demanded by modern industrial automation. Our application engineers are available to review your system requirements, calculate load budgets, and design redundant power architectures tailored to your uptime objectives.

Contact our technical sales team today: Request a detailed quotation, discuss volume pricing for multi-site deployments, or schedule a consultation to evaluate power supply options for your next project. We support system integrators, OEMs, and end-users with application-specific solutions backed by industry-leading technical expertise.

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