UCS-CPU-I6326=: Cisco’s High-Performance Pr
Architectural Overview and Functional Design�...
What Is the Cisco SLES-2S-LP-D1A=?
The Cisco SLES-2S-LP-D1A= is a low-profile, dual-input AC/DC power supply designed for Cisco Catalyst® and Nexus® switches deployed in space-constrained environments. This 550W redundant PSU supports both 100–240V AC and –48V DC inputs, providing flexibility for enterprises and data centers requiring high availability and energy efficiency. Its compact design and hot-swappable architecture ensure continuous operation during power failures or maintenance.
Key features include:
- Dual-Input Redundancy: Seamless failover between AC and DC power sources.
- 80 PLUS Platinum Efficiency: ≥94% efficiency at 50% load, reducing operational costs.
- Tool-Free Installation: Slides into Cisco chassis without additional hardware.
Technical Specifications and Compatibility
The SLES-2S-LP-D1A= is engineered for mission-critical uptime. Below are its core specifications:
| Parameter | Value |
|---|---|
| Input Voltage | AC: 100–240V; DC: –48V (±20%) |
| Output Power | 550W |
| Efficiency | 94% (typical at 50% load) |
| Dimensions (HxWxD) | 1.6″ x 3.9″ x 9.8″ (40mm x 100mm x 250mm) |
| Operating Temperature | -40°C to 75°C (-40°F to 167°F) |
| Certifications | UL 60950, IEC 62368-1, NEBS Level 3 |
Compatible Platforms:
- Cisco Catalyst 9300/9400/9500 Series
- Cisco Nexus 3164/3172/31108 Switches
- Cisco Industrial Ethernet 4000 Series
Primary Use Cases and Deployment Scenarios
1. High-Density Data Center Cabinets
In cabinets with limited vertical space (e.g., 1U switches), the SLES-2S-LP-D1A=’s low-profile design allows stacking multiple PSUs without obstructing airflow. For example, a Catalyst 9500 switch with dual PSUs consumes only 3.2U of rack space.
2. Edge Computing Sites
Deployed in telecom edge locations, the power supply’s wide temperature tolerance ensures reliability in uncontrolled environments like street cabinets or 5G small cell sites.
3. Hybrid Power Infrastructure
Organizations transitioning from DC to AC power grids use the dual-input capability to maintain uptime during phased upgrades.
Installation and Optimization Guidelines
Pre-Installation Requirements
- Input Wiring:
- AC: Use 14 AWG copper wire with a 20A circuit breaker.
- DC: Connect to a –48V battery bank with 10 AWG wire and a 15A fuse.
- Grounding: Ensure chassis ground resistance <1Ω to mitigate EMI.
Operational Best Practices
- Load Balancing: Distribute power evenly across PSUs to avoid exceeding 80% capacity.
- Firmware Updates: Verify PSU compatibility with Cisco IOS-XE releases using:
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show platform hardware fed switch active psu detail - Preventive Maintenance:
- Clean air intakes quarterly with compressed air (≤30 psi).
- Test DC input batteries bi-annually for voltage stability.
Troubleshooting Common Issues
- PSU Failure LED: Check for input voltage fluctuations or blown fuses.
- Intermittent Shutdowns: Replace aging DC batteries or recalibrate AC voltage regulators.
Why Choose the SLES-2S-LP-D1A= Over Third-Party PSUs?
While generic power supplies may cost 30–50% less, Cisco’s solution provides unmatched advantages:
- Predictive Analytics: Integrates with Cisco DNA Center for real-time health monitoring.
- Cross-Fabric Redundancy: Supports N+1 redundancy across multiple chassis.
- Global Compliance: Meets safety and emissions standards for international deployments.
For guaranteed performance and lifecycle support, purchase from authorized partners like “SLES-2S-LP-D1A=” at ITMall.sale.
Operational Insights from Critical Deployments
During a data center outage caused by an AC grid failure, the SLES-2S-LP-D1A= seamlessly switched to DC backup power, preventing 200+ Catalyst 9300 switches from rebooting. However, a logistics oversight during deployment left 10% of units without properly grounded DC inputs, triggering false failure alerts. Contrast this with a manufacturing plant that opted for third-party PSUs—their lack of NEBS compliance led to recurrent shutdowns in high-vibration environments. For engineers, the SLES-2S-LP-D1A= isn’t just a component; it’s the difference between a minor incident and a catastrophic network failure.