| Feature | Specification |
| Model | WARTSILA PDM-20/24VDC |
| Part Number | PAAE045082 |
| Input Voltage | 24V DC (Redundant Inputs) |
| Output Channels | 20 Fused Distribution Channels |
| Current Rating | Max 10A per channel / 40A Total Bus |
| Monitoring | Individual Fuse Status LEDs & Group Alarm |
| Mounting | Standard 35mm DIN Rail |
| Protection | Short Circuit & Overload via Plug-in Fuses |
| Operating Temp | -10°C to +70°C |
The WARTSILA PDM-20/24VDC serves as a high-performance power distribution unit designed specifically for the Wärtsilä UNIC engine control system and ship automation networks. It excels in providing centralized, fused power for multiple electronic modules, sensors, and actuators, ensuring that a localized electrical fault on one channel does not compromise the integrity of the entire 24V DC control bus during critical maritime operations.
Model Comparisons
The PDM-20 (PAAE045082) is distinguished from the PDM-10 series by its high-density 20-channel configuration, designed for larger engine control cabinets where space is at a premium. While the older PAAE034xxx versions utilized standard glass fuses, the PAAE045082 revision is optimized for blade-type automotive fuses or electronic circuit breakers, offering faster replacement and better vibration resistance. Compared to the PDM-20/110V variant, this 24VDC model features lower impedance internal busbars specifically tuned to minimize voltage drops in high-speed digital control circuits.
WARTSILA PDM-20/24VDC
Operating Tips
- Redundancy Wiring: Always connect both independent 24V DC supply inputs to separate power sources (A/B feeds) to ensure the PDM continues to distribute power if one primary supply fails.
- Fuse Coordination: When replacing fuses, strictly adhere to the amperage ratings specified in the UNIC system manual for each specific branch; over-fusing can lead to permanent damage of downstream I/O cards during a short circuit.
- Alarm Integration: Utilize the common “Group Alarm” volt-free contact to trigger a notification in the Alarm and Monitoring System (AMS) to ensure immediate detection of a blown fuse in remote engine room cabinets.
