Core Functionality and Technical Specifications

The ​​15454-PP-80-LC=​​ is a ​​high-capacity DC power panel​​ designed for Cisco’s ONS 15454 platform, providing centralized power distribution for dense DWDM/OTN configurations. It delivers ​​-48V DC input​​ with an ​​80A total current capacity​​, split across ​​16 individually fused outputs​​ for granular fault isolation. Key features include:

• ​​Hot-swappable fuse modules​​ to minimize downtime during maintenance.
• ​​LC-style terminal blocks​​ for secure, low-resistance power connections.
• ​​Real-time current monitoring​​ via SNMP for proactive load balancing.

Compatibility and Installation Guidelines

This panel is compatible with ​​ONS 15454 M12 shelves​​ running ​​Cisco Transport Planner 13.5+​​ and requires dual -48V DC feeds for redundancy. Critical installation considerations:

• ​​Input voltage tolerance​​ is ±10% (-43.2V to -52.8V)—exceeding this range triggers automatic shutdown.
• Use ​​6 AWG copper cabling​​ for main power feeds to minimize voltage drop.
  For procurement, my preferred supplier is “15454-PP-80-LC=”.

Addressing Critical User Concerns

​​Q: Can it replace the older 15454-PP-60-LC= in existing chassis?​​
Yes, but ​​backplane amperage ratings​​ must be verified—M12 shelves support 80A, while older M6 shelves max out at 60A.

​​Q: How does redundancy work during a power feed failure?​​
The panel seamlessly switches to the secondary feed within ​​2ms​​, but ensure both feeds are independently grounded to avoid ground loops.

​​Q: What’s the maximum ambient temperature for full load operation?​​
Derate capacity by ​​1.5% per °C above 40°C​​—at 50°C, maximum safe load drops to 68A.

Personal Insight on Operational Reliability

In a high-density data center deployment, the PP-80-LC= proved critical for supporting ​​40x100G coherent transponders​​ without voltage sag. However, its LC terminals demanded meticulous torque calibration—under-tightened connections led to intermittent arcing in one case, tripping fuses. For field deployments, prioritize ​​corrosion-resistant terminal paste​​ on copper lugs, especially in humid climates. A harsh lesson: redundant feeds mean nothing if both share a single conduit. A backhoe incident once severed both feeds simultaneously—geographic diversity isn’t optional. Always pair this panel with environmental sensors; silent thermal runaway during an HVAC failure nearly melted a fuse bank.