Description
Technical Specifications
- Product Model: PHOENIX CONTACT QUINT-DIODE-40 2938963
- Brand: Phoenix Contact
- Warranty: One Year
- Input Voltage: 24 VDC nominal (0–30 VDC operating range)
- Operating Temperature: -25°C to +70°C (derating above 60°C)
- Storage Temperature: -40°C to +85°C
- Response Time: Instant diode-based switching with no mechanical delay
- Protection Class: IP20 (for installation in enclosed control cabinets)
- Accuracy Class: Low voltage drop (~0.5 V) for efficient power distribution
- Output Frequency: Continuous DC distribution to system loads
- Rated Current Range: 2 × 20 A input channels or 1 × 40 A total output
- Communication Interface: Potential-free relay contact for status signaling
- Supported Protocols: Compatible with standard 24 VDC industrial power systems
- Overload Capacity: Supports load currents up to 40 A with surge protection
- Efficiency: >97% at nominal load
- Dimensions: 62 mm × 84 mm × 102 mm
- Mounting Type: DIN rail (NS 35) mounting
- Connection Type: Screw terminal connection (0.5–16 mm² conductors)
Product Overview
The PHOENIX CONTACT QUINT-DIODE-40 2938963 is a high-current redundancy module designed to increase the reliability of industrial DC power supply systems. It allows two independent 24 VDC power supplies to be connected in parallel while electrically isolating them using diode technology, ensuring uninterrupted operation if one power source fails.
In automation cabinets, power supply failures can lead to downtime in PLC controllers, industrial networks, or safety systems. This module eliminates the single-point-of-failure risk by enabling redundant power configurations such as 1+1 or N+1 architectures. If one power supply stops delivering voltage due to internal faults or primary power loss, the second supply instantly takes over the full load without interruption.
The module uses optimized Schottky diode technology, minimizing voltage drop and reducing heat generation compared with traditional silicon diode circuits. This ensures high efficiency and stable operation even at load currents up to 40 A.
Because of its compact DIN-rail design, high current capability, and robust industrial approvals, Phoenix Contact redundancy modules are widely deployed in process automation systems, industrial control panels, and critical infrastructure where power continuity is essential.
Key Functions
Redundant Power Supply Decoupling
The module isolates two DC power supplies connected in parallel, preventing back-feeding between supplies. If one power source fails or drops voltage, the remaining supply immediately maintains the load without system interruption.
High-Efficiency Schottky Diode Technology
Specialized Schottky diodes reduce the forward voltage drop to around 0.5 V, lowering heat generation and improving overall system efficiency compared with conventional diode isolation circuits.
Integrated Monitoring and Alarm Output
A built-in potential-free relay contact can signal overheating or diode faults. This allows the redundancy module to be connected to a PLC or monitoring system for predictive maintenance and diagnostics.
High-Current Industrial Power Handling
The module supports 40 A total output current, making it suitable for high-power automation systems including PLC racks, industrial PCs, communication infrastructure, and I/O stations.
DIN-Rail Cabinet Integration
Designed for standard 35 mm DIN rail mounting, the module integrates easily into control cabinets alongside power supplies and automation equipment, simplifying installation and maintenance.
Application Scenarios
PLC and DCS Control Cabinets
In automation systems where PLCs, remote I/O modules, and controllers depend on a stable 24 VDC supply, the module ensures continuous power availability even if one power supply unit fails.
Industrial Communication Networks
Ethernet switches, fieldbus gateways, and industrial servers often require redundant power inputs. The module enables reliable DC redundancy for network infrastructure in factories or process plants.
Process Industry Safety Systems
In oil & gas, chemical, and power generation facilities, uninterrupted power is critical for safety-related control systems. The redundancy module ensures that safety controllers remain powered during supply faults.
Manufacturing and Continuous Production Lines
Production systems with high uptime requirements—such as semiconductor manufacturing or packaging lines—use redundant power architectures to avoid downtime caused by power supply failures.
