Cisco NXA-FAN-35CFM-PI Full English Description

Product Overview

Important Note: All fan modules and power supplies deployed within the same chassismust use identical airflow direction. Mixing PI (intake) and PE (exhaust) airflow modules is unsupported and will create thermal hotspots leading to overheating risks. Each module contains dual independent internal rotors. If one rotor fails, the second rotor delivers limited temporary cooling; the entire fan FRU must be replaced upon module-level failure. Standard ESD anti-static procedures must be followed during removal and installation.

Key Features

1. Intelligent Variable-Speed Thermal Regulation

   The fan module dynamically adjusts rotational speed according to real-time internal chassis temperature, operating altitude and thermal load from active ports. Fans run at low RPM under light workloads to reduce power consumption and acoustic noise, and automatically accelerate to boost airflow when temperatures rise. Continuous thermal telemetry data is reported to Cisco NX-OS or ACI firmware for full environmental monitoring.
2. Front-to-Back (Port-side Intake) Airflow Architecture

   Airflow Direction: Cool air enters from the front port panel, and hot air exhausts toward the chassis rear. This airflow mode fits standard data center rack deployment where switch ports face the cold aisle. Operators must keep intake and exhaust openings unobstructed to maintain rated cooling efficiency.
3. OIR (Online Insertion and Removal) Support

   Technicians can replace the fan module without powering off or rebooting the host Nexus switch. Maintenance operations are completed via fan bays on the chassis rear, supporting non-disruptive servicing for leaf and aggregation fabrics. A sufficient number of functional fan modules must remain installed during replacement activities to avoid thermal protection shutdown.
4. Visual Status LED & Remote Monitoring

   Built-in status LED provides instant local visual feedback:

• Solid Green: All internal rotors operate normally
• Solid Amber/Red: Rotor fault or over-temperature alarm detected
  NX-OS generates environmental syslog entries and sends SNMP traps to centralized monitoring systems immediately once fan anomalies are detected.

1. Dual-Rotor Internal Redundancy

   Two independent rotors are integrated inside each fan tray. If one rotor malfunctions, the remaining rotor provides partial temporary cooling capacity. Administrators should arrange replacement promptly to eliminate thermal single-point-of-failure risks.
2. Data Center-Grade Reliability

   Brushless DC industrial fan assembly designed for 24/7 continuous operation within enterprise and cloud data center leaf layers, optimized for medium and high-density 25G/100G fixed port switches.

Supported Hardware Platforms

Not compatible: Nexus 9500 / 9800 modular chassis, legacy Nexus 9300-PX/TX/PQ Gen1 switches, Catalyst switching platforms.

Typical Application Scenarios

• Leaf fabric deployments on Nexus 9000 FX/FX3 fixed switches running standalone NX-OS or ACI fabric mode
• Spare replacement cooling module for port-side intake configured Nexus fixed switches
• Data center rack layouts with switch ports facing the cold aisle
• Mission-critical cloud and enterprise infrastructure requiring hot-swappable non-disruptive maintenance

Technical Specifications

• Form Factor: Single hot-swappable fan module
• Part Number: NXA-FAN-35CFM-PI
• Maximum Airflow Rate: 35 CFM
• Airflow Direction: Front-to-Back (Port-side Intake, burgundy handle)
• Reverse Airflow Counterpart: NXA-FAN-35CFM-PE (Back-to-Front / Port-side Exhaust, blue handle)
• Hot Swappable: Yes (OIR supported under NX-OS / ACI firmware)
• Internal Structure: Dual independent rotors
• Monitoring: Status LED + NX-OS environmental logging & SNMP traps
• Operating Ambient Temperature: 0°C ~ +40°C
• Compliance: UL60950-1, EN60950-1, FCC Class A, CE certified, RoHS compliant

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