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QUINT-DIODE/40 (2938963) is a 24VDC diode redundancy module manufactured by Contact Phénix. 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.
- Explication du code modèle
| Segment de modèle | Description |
| 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: 40UN (supports 2×20A redundant input) |
| Numéro de commande. | 2938963 (Unique factory part number) |
| Remplacement de mise à niveau | QUINT4-DIODE/12-24DC/2X20/1X40 (Numéro de commande: 2907719) |
- Spécifications techniques de base
| Catégorie | Caractéristiques |
| Caractéristiques électriques | |
| Tension d'entrée | 24VCC (Gamme: 0~30VDC) |
| Courant d'entrée nominal | 2×20A (Redundancy Mode) / 1×40A (Capacity Expansion Mode) |
| Max.. Courant de sortie | 40UN (à 40°C, with 6mm² cable) |
| Voltage Drop | 0.5V (Input to Output) |
| Efficacité | >97% |
| Protection contre l'inversion de polarité | Oui (<60V) |
| Transient Surge Protection | Transil Diode |
| Caractéristiques mécaniques | |
| Type de montage | Montage sur rail DIN (N.-É. 35, conforme à la norme EN 60715) |
| Dimensions (L × H × P) | 62mm × 84mm × 102mm |
| Matériau du boîtier | Metal (AlMg enclosure, GD-ZnAlCu cooling unit) |
| Poids | 600g (without packaging), 683g (with packaging) |
| Environmental Characteristics | |
| Température de fonctionnement | -25°C ~ 70°C (Derating required above 60°C) |
| Température de stockage | -40°C ~ 85°C |
| Protection contre la pénétration | IP20 (For installation inside enclosed control cabinets only) |
| Classe de protection | Classe II (Double insulation) |
| Certifications & Fiabilité | |
| MTBF (@40°C) | 28,571,428 heures (environ. 3260 années) |
| Marine Certifications | DNV GL (EMC A), ABS |
| Certification UL | UL/C-UL Listed (UL 508, UL 1604 Classe I, Division 2) |
| ATEX Certification | II 3G Ex nA IIC T4 Gc |
| HS Code | 85049090 |
- Multimarque & Old/New Model Replacement List
3.1 Original Manufacturer Replacements
| Ancien modèle | Statut | Modèle de remplacement | Numéro de commande. | Major Improvements |
| QUINT-DIODE/40 | Discontinué | 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 | Actif | QUINT4-DIODE/12-24DC/2X20/1X40 | 2907719 | In-series upgrade with enhanced performance |
| QUINT-DIODE/48DC/2X20/1X40 | Actif | QUINT4-DIODE/48DC/2X20/1X40 | 2907720 | Upgrade for 48VDC version |
3.2 Cross-Brand Compatible Replacements
| Marque | Modèle | Courant nominal | Plage de tension | Caractéristiques |
| Weidmüller | UR 24DC/2×20/1×40 | 40UN | 24VCC | Diode redundancy, Montage sur rail DIN |
| WAGO | 289-602 | 40UN | 24VCC | Conception compacte, faible consommation d'énergie |
| Würth | WE-DD-40 | 40UN | 24VCC | Haute fiabilité, industrial certifications |
| R.. STAHL | Série 8579 | 40UN | 24VCC | Explosion-proof certified for hazardous areas |
- Full Product Line List
4.1 QUINT-DIODE Series (Classic Models)
| Modèle | Numéro de commande. | Tension nominale | Note actuelle | Caractéristiques |
| QUINT-DIODE/40 | 2938963 | 24VCC | 2×20A / 1×40A | Modèle de base, abandonné |
| QUINT-DIODE/12-24DC/2X20/1X40 | 2320157 | 12-24VCC | 2×20A / 1×40A | Large plage de tension, commonly used |
| QUINT-DIODE/48DC/2X20/1X40 | 2320160 | 48VCC | 2×20A / 1×40A | Dedicated for 48VDC systems |
| QUINT-DIODE/48DC/40 | 2866585 | 48VCC | 40UN | Protective coating, adapté aux environnements difficiles |
4.2 QUINT4-DIODE Series (Modèles améliorés)
| Modèle | Numéro de commande. | Tension nominale | Note actuelle | Caractéristiques |
| QUINT4-DIODE/12-24DC/2X20/1X40 | 2907719 | 12-24VCC | 2×20A / 1×40A | Conception à large température: -40°C~60°C |
| QUINT4-DIODE/48DC/2X20/1X40 | 2907720 | 48VCC | 2×20A / 1×40A | Upgrade for 48VDC systems |
4.3 QUINT-ORING Series (Active Redundancy with ACB Current Sharing)
| Modèle | Numéro de commande. | Tension nominale | Note actuelle | Caractéristiques |
| QUINT-ORING/24DC/2X20/1X40 | 2320186 | 24VCC | 2×20A / 1×40A | Active current sharing, extended power supply service life |
| QUINT4-S-ORING/12-24DC/1X40 | 2907752 | 12-24VCC | 40UN | Intelligent monitoring, compatible with QUINT4 power supplies |
- Environnements d'applications & Cas industriels
5.1 En vigueur & Non-Recommended Scenarios
| Scénarios applicables | Non-Recommended Scenarios |
| Systèmes de contrôle d'automatisation industrielle (API, DCS) | Long-term high-load systems requiring active current sharing (ORING series recommended) |
| Équipement de contrôle de processus (Pétrochimique, Traitement de l'eau) | Unstable power supplies with voltage fluctuation over ±25% |
| Infrastructure (Stations de base de communication, Centres de données) | Zones dangereuses explosives (Select EX-certified models) |
| Marin & offshore engineering (Marine certifications available) | Unprotected outdoor installation (IP20 rating only) |
| Matériel médical (Compliant with SELV/PELV requirements) | Ambient temperature above 70°C (Derate load or use high-temperature models) |
5.2 Cas d'application typiques
- Automobile Production Lines
Application: Two QUINT-PS/1AC/24DC/20 power supplies connected in parallel with QUINT-DIODE/40 for redundancy.
Valeur: Ensure continuous operation of welding robots and PLC systems, and reduce production downtime losses.
- Petrochemical Process Control
Application: Redundant power configuration for Safety Instrumented Systems (SIS).
Valeur: Conforme à la CEI 61508, provides SIL 2 safety level and prevents safety accidents caused by power failure.
- Smart Grid Monitoring Systems
Application: Dual power redundancy for Remote Terminal Units (RTU).
Valeur: Maintain communication and data acquisition under extreme weather conditions to guarantee stable grid operation.
- Dépannage & Maintenance Manual
6.1 Défauts courants, Causes & Solutions
| Phénomène de défaut | Causes possibles | Solutions |
| 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. Mauvaise dissipation de la chaleur | 2. Reserve sufficient clearance for heat dissipation (50mm top & bas) | |
| 3. Température ambiante trop élevée | 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
- Inspection visuelle
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.
- Electrical Testing
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.
- Lignes directrices de sélection & Règles de référence rapide
- Trois facteurs de sélection clés: Classe de tension (24/48VCC), Current demand (≤40A), Redundancy mode (2×20A or 1×40A)
- Replacement Rule: QUINT-DIODE/40 is replaced by QUINT4-DIODE/12-24DC/2X20/1X40 (2907719), fully backward compatible.
- Current Derating Rules:
6câble mm²: 39A @ 40°C, 32A @ 60°C
10câble mm²: 54A @ 40°C, 43A @ 60°C
16câble mm²: 60A @ 40°C, 48A @ 60°C
- Exigences d'installation: Horizontal or vertical DIN rail mounting; reserve 50mm clearance top and bottom for heat dissipation, 5mm clearance on left and right sides.
