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QUINT-DIODE/40 (2938963) is a 24VDC diode redundancy module manufactured by Phoenix Contact. It is designed for parallel redundancy of two 20A power supplies or capacity expansion for a single 40A circuit. This model is discontinued. The official replacement is QUINT4-DIODE/12-24DC/2X20/1X40 (2907719). It features reverse polarity protection, low voltage drop (0.5V) and efficiency over 97%, ideal for critical systems such as industrial automation and process control.
- Erklärung des Modellcodes
| Modellsegment | Beschreibung |
| QUINT | Product line identifier for Phoenix QUINT POWER power supplies |
| DIODE | Diode-type redundancy module (passive redundancy, no active current sharing) |
| 40 | Maximum output current: 40A (supports 2×20A redundant input) |
| Bestell-Nr. | 2938963 (Unique factory part number) |
| Upgrade-Ersatz | QUINT4-DIODE/12-24DC/2X20/1X40 (Bestell-Nr.: 2907719) |
- Grundlegende technische Spezifikationen
| Kategorie | Spezifikationen |
| Elektrische Eigenschaften | |
| Eingangsspannung | 24VDC (Reichweite: 0~30VDC) |
| Nenneingangsstrom | 2×20A (Redundancy Mode) / 1×40A (Capacity Expansion Mode) |
| Max. Ausgangsstrom | 40A (bei 40°C, with 6mm² cable) |
| Voltage Drop | 0.5V (Input to Output) |
| Effizienz | >97% |
| Reverse Polarity Protection | Ja (<60V) |
| Transient Surge Protection | Transil Diode |
| Mechanische Eigenschaften | |
| Montageart | DIN-Schienenmontage (NS 35, konform mit EN 60715) |
| Abmessungen (B × H × T) | 62mm × 84mm × 102mm |
| Gehäusematerial | Metall (AlMg enclosure, GD-ZnAlCu cooling unit) |
| Gewicht | 600G (without packaging), 683G (with packaging) |
| Umwelteigenschaften | |
| Betriebstemperatur | -25°C ~ 70 °C (Derating required above 60°C) |
| Lagertemperatur | -40°C ~ 85°C |
| Schutz vor Eindringen | IP20 (For installation inside enclosed control cabinets only) |
| Schutzklasse | Klasse II (Double insulation) |
| Zertifizierungen & Zuverlässigkeit | |
| MTBF (@40°C) | 28,571,428 Std. (ca. 3260 Jahre) |
| Marine Certifications | DNV GL (EMC A), ABS |
| UL-Zertifizierung | UL/C-UL Listed (UL 508, UL 1604 Klasse I, Division 2) |
| ATEX Certification | II 3G Ex nA IIC T4 Gc |
| HS-Code | 85049090 |
- Cross-Brand & Old/New Model Replacement List
3.1 Original Manufacturer Replacements
| Altes Modell | Status | Ersatzmodell | Bestell-Nr. | Major Improvements |
| QUINT-DIODE/40 | Auslaufmodell | QUINT4-DIODE/12-24DC/2X20/1X40 | 2907719 | Extended operating temperature: -40°C~60°C; 12-24VDC wide voltage range; optimized heat dissipation |
| QUINT-DIODE/12-24DC/2X20/1X40 | Aktiv | QUINT4-DIODE/12-24DC/2X20/1X40 | 2907719 | In-series upgrade with enhanced performance |
| QUINT-DIODE/48DC/2X20/1X40 | Aktiv | QUINT4-DIODE/48DC/2X20/1X40 | 2907720 | Upgrade for 48VDC version |
3.2 Cross-Brand Compatible Replacements
| Marke | Modell | Nennstrom | Spannungsbereich | Merkmale |
| Weidmüller | UR 24DC/2×20/1×40 | 40A | 24VDC | Diode redundancy, DIN rail mount |
| WAGO | 289-602 | 40A | 24VDC | Kompaktes Design, geringer Stromverbrauch |
| Würth | WE-DD-40 | 40A | 24VDC | Hohe Zuverlässigkeit, industrial certifications |
| R. STAHL | Serie 8579 | 40A | 24VDC | Explosion-proof certified for hazardous areas |
- Full Product Line List
4.1 QUINT-DIODE Series (Classic Models)
| Modell | Bestell-Nr. | Nennspannung | Aktuelle Bewertung | Merkmale |
| QUINT-DIODE/40 | 2938963 | 24VDC | 2×20A / 1×40A | Grundmodell, eingestellt |
| QUINT-DIODE/12-24DC/2X20/1X40 | 2320157 | 12-24VDC | 2×20A / 1×40A | Großer Spannungsbereich, commonly used |
| QUINT-DIODE/48DC/2X20/1X40 | 2320160 | 48VDC | 2×20A / 1×40A | Dedicated for 48VDC systems |
| QUINT-DIODE/48DC/40 | 2866585 | 48VDC | 40A | Protective coating, geeignet für raue Umgebungen |
4.2 QUINT4-DIODE Series (Verbesserte Modelle)
| Modell | Bestell-Nr. | Nennspannung | Aktuelle Bewertung | Merkmale |
| QUINT4-DIODE/12-24DC/2X20/1X40 | 2907719 | 12-24VDC | 2×20A / 1×40A | Breites Temperaturdesign: -40°C~60°C |
| QUINT4-DIODE/48DC/2X20/1X40 | 2907720 | 48VDC | 2×20A / 1×40A | Upgrade for 48VDC systems |
4.3 QUINT-ORING Series (Active Redundancy with ACB Current Sharing)
| Modell | Bestell-Nr. | Nennspannung | Aktuelle Bewertung | Merkmale |
| QUINT-ORING/24DC/2X20/1X40 | 2320186 | 24VDC | 2×20A / 1×40A | Active current sharing, extended power supply service life |
| QUINT4-S-ORING/12-24DC/1X40 | 2907752 | 12-24VDC | 40A | Intelligent monitoring, compatible with QUINT4 power supplies |
- Anwendungsumgebungen & Branchenfälle
5.1 Anwendbar & Non-Recommended Scenarios
| Anwendbare Szenarien | Non-Recommended Scenarios |
| Industrial automation control systems (SPS, DCS) | Long-term high-load systems requiring active current sharing (ORING series recommended) |
| Prozesskontrollausrüstung (Petrochemie, Water treatment) | Unstable power supplies with voltage fluctuation over ±25% |
| Infrastruktur (Kommunikationsbasisstationen, Rechenzentren) | Explosionsgefährdete Bereiche (Select EX-certified models) |
| Marine & Offshore-Technik (Marine certifications available) | Unprotected outdoor installation (IP20 rating only) |
| Medizinische Geräte (Compliant with SELV/PELV requirements) | Ambient temperature above 70°C (Derate load or use high-temperature models) |
5.2 Typische Anwendungsfälle
- Automobile Production Lines
Anwendung: Two QUINT-PS/1AC/24DC/20 power supplies connected in parallel with QUINT-DIODE/40 for redundancy.
Wert: Ensure continuous operation of welding robots and PLC systems, and reduce production downtime losses.
- Petrochemical Process Control
Anwendung: Redundant power configuration for Safety Instrumented Systems (SIS).
Wert: Konform mit IEC 61508, provides SIL 2 safety level and prevents safety accidents caused by power failure.
- Smart Grid Monitoring Systems
Anwendung: Dual power redundancy for Remote Terminal Units (RTU).
Wert: Maintain communication and data acquisition under extreme weather conditions to guarantee stable grid operation.
- Fehlerbehebung & Maintenance Manual
6.1 Häufige Fehler, Ursachen & Lösungen
| Fehlerphänomen | Mögliche Ursachen | Lösungen |
| Abnormally low output voltage | 1. Excessive forward voltage drop of internal diodes | 1. Verify input voltage within 0~30VDC |
| 2. Insufficient input voltage | 2. Check and retighten terminals | |
| 3. Loose terminal connections | 3. Test internal diodes with multimeter diode mode | |
| Severe overheating | 1. Overloaded current | 1. Ensure load current does not exceed 40A (derate per cable specification) |
| 2. Schlechte Wärmeableitung | 2. Reserve sufficient clearance for heat dissipation (50mm top & bottom) | |
| 3. Zu hohe Umgebungstemperatur | 3. Lower ambient temperature or add ventilation | |
| Failed parallel operation of power supplies | 1. Reverse wiring polarity | 1. Recheck wiring polarity |
| 2. Excessive voltage difference between two inputs | 2. Keep voltage difference between two power supplies within 1V | |
| 3. Open-circuit internal diode | 3. Replace the faulty module | |
| Malfunction of reverse current protection | 1. Damaged reverse polarity protection diode | 1. Limit input voltage below 30VDC |
| 2. Input voltage over 60V | 2. Replace internal protection diode | |
| 3. Install external surge suppressor |
6.2 On-site Quick Diagnosis Procedure
- Visuelle Inspektion
Check housing for burn marks, deformation or discoloration.
Inspect terminals for looseness, oxidation and corrosion.
Remove dust accumulated on heat sinks which impairs heat dissipation.
- Elektrische Prüfung
Measure input voltage to confirm it is within 0~30VDC.
Measure output voltage (normally input voltage minus 0.5V).
Test diode forward/reverse resistance: normal state is forward conduction and reverse cut-off.
- Function Verification
Disconnect one power supply and confirm the other works normally.
Restore dual power input and check uniform load distribution.
Measure temperature rise: shall not exceed ambient temperature +30°C.
- Auswahlrichtlinien & Kurzreferenzregeln
- Drei wichtige Auswahlfaktoren: Spannungsklasse (24/48VDC), Current demand (≤40A), Redundancy mode (2×20A or 1×40A)
- Ersetzungsregel: QUINT-DIODE/40 is replaced by QUINT4-DIODE/12-24DC/2X20/1X40 (2907719), fully backward compatible.
- Current Derating Rules:
6mm² Kabel: 39A @ 40°C, 32A @ 60°C
10mm² Kabel: 54A @ 40°C, 43A @ 60°C
16mm² Kabel: 60A @ 40°C, 48A @ 60°C
- Installationsanforderungen: Horizontal or vertical DIN rail mounting; reserve 50mm clearance top and bottom for heat dissipation, 5mm clearance on left and right sides.
