Description
Application Scenarios
In a chemical DCS control cabinet, two independent 24V DC power supplies are connected in parallel to feed PLCs and I/O cards. However, when one supply output voltage is slightly higher than the other, the load current is drawn entirely from the higher-voltage source, causing that unit to run overloaded, heat up, and age rapidly. More critically, if that supply fails, the entire system faces power loss. After installing the PHOENIX CONTACT 2320157, the two supplies are electrically isolated through diode decoupling. When either supply fails, the other automatically continues powering the load, delivering uninterrupted 24V DC. The 2320157 diode decoupling design fundamentally eliminates circulating currents and reverse feed risks between supplies, elevating overall system availability to near 100%.
Parameter
| Parameter | Value/Description |
|---|---|
| Product Model | PHOENIX CONTACT 2320157 |
| Manufacturer | Phoenix Contact |
| Product Category | Redundancy Module / DIN Rail Diode Module |
| Product Family | QUINT DIODE |
| Nominal Input Voltage | 12 V DC … 24 V DC |
| Input Voltage Range | 10 V DC … 30 V DC |
| Nominal Input Current | 2 x 20 A (-25°C … 60°C) / 1 x 40 A |
| Maximum Input Current | 2 x 30 A (-25°C … 40°C) / 1 x 60 A |
| Output Current | 40 A (Power Increase) / 20 A (Redundancy) |
| Efficiency | > 97% |
| Power Loss | 10 W (at nominal load, IOUT = 20A) |
| Degree of Protection | IP20 |
| Ambient Temperature (Operation) | -40°C … 70°C (>60°C Derating: 2.5%/K) |
| Mounting | Horizontal DIN Rail NS 35 (EN 60715) |
| Dimensions (W x H x D) | 50 mm x 130 mm x 125 mm |
| Net Weight | Approx. 0.75 kg |
| MTBF | 40,000,000 hours (IEC 61709, SN 29500) |
Technical Principles and Innovative Values
Innovation Point 1: Diode Decoupling for 100% System Isolation. The 2320157 operates on the principle of diode forward conduction and reverse blocking, electrically isolating the outputs of two parallel power supplies. Unlike active ORING modules, diode-based solutions require no external control circuitry for automatic decoupling—simple in structure, highly reliable. No circulating currents flow between the two supplies, and neither can reverse-feed the other, ensuring each supply only delivers power to the load .
Innovation Point 2: Consistent Redundancy Down to the Load. The 2320157 is designed to maintain redundancy throughout the entire power path. From the supply inputs through the module output terminals to the final load device, redundant protection is uninterrupted. Even if one supply fails completely, the load continues receiving stable, uninterrupted power—ideal for automation systems with the highest power continuity requirements .
Innovation Point 3: Wide Voltage Range and High Current Capacity. The 2320157 supports a broad 12V to 24V DC input range, with single-path output current up to 40A and 20A per path in dual redundancy mode. This specification covers loads from small sensor networks to large PLC racks. Module efficiency exceeds 97%, with power loss of only 10W at 20A load, minimizing heat generation and enabling dense side-by-side mounting .
