Cisco FAN-MOD-3HS Full English Description

Product Overview

Important Note: This tray is chassis-specific hardware and cannot be interchanged with FAN-MOD-3, FAN-MOD-4HS, WS-C6503-E-FAN and other 6500/7600 series fan trays. Individual fans inside the tray arenot field-replaceable. The entire tray must be replaced once any internal fan fails. Operating the equipment without an installed fan tray triggers critical thermal alarms and may lead to permanent hardware overheating damage.

Key Features

1. Intelligent Variable-Speed Thermal Regulation

   The fan tray dynamically adjusts rotational speed based on real-time chassis temperature, altitude and traffic load. It operates at low RPM under light workloads to reduce acoustic noise and automatically boosts airflow under high thermal conditions. Real-time thermal telemetry is transmitted to Cisco IOS for continuous environmental monitoring. Maximum airflow reaches 270 CFM at full operating speed.
2. Side-to-Side Airflow Architecture

   Airflow Direction: Right-side intake → Left-side exhaust when facing the chassis front panel. This native thermal layout matches Catalyst 6503 and 7603 chassis design, providing balanced cooling for supervisors, line cards and power supplies. Suitable for enterprise wiring closets and service provider edge rack deployments.
3. OIR (Online Insertion and Removal) Support

   Engineers can replace the whole fan tray without powering off or rebooting Catalyst 6503 switch or Cisco 7603 router. Equipped with ergonomic handles and captive screws for convenient tool-free installation and removal, minimizing maintenance downtime for mission-critical networks.
4. Front Panel Visual Status LED & Remote Monitoring

   Status LED located on the front face of the fan tray provides instant local visual feedback:

• Solid Green: All internal fans operate normally
• Solid Red: One or more internal fans stall or suffer hardware faults
  Cisco IOS records environmental event logs and sends SNMP traps to centralized monitoring systems immediately upon fan fault detection.

1. Built-In Multi-Fan Redundancy

   Four independent fans are integrated within one tray. If a single fan fails, remaining functional fans automatically ramp up speed to sustain basic cooling capacity. Administrators should replace the fan tray promptly after detecting any fan failure to eliminate thermal single-point-of-failure risks.
2. Carrier-Grade Durability

   Industrial long-life fan assembly engineered for 24/7 continuous operation in enterprise campus distribution and service provider edge networks. Optimized to dissipate heavy heat generated by high-performance supervisor engines and multi-gigabit line cards.

Supported Hardware Platforms

• Catalyst 6503 (WS-C6503) modular switch chassis
• Cisco 7603 modular service router chassis

Not compatible: Catalyst 6503-E, Catalyst 6506/6509/6513, Catalyst 4500 / 9000 series switches, other 7600 chassis variants, all Nexus data center switch platforms.

Typical Application Scenarios

• Enterprise campus distribution layer deployments built on Catalyst 6503 switches with Sup32 / Sup720 supervisors
• Service provider edge networking using Cisco 7603 routers
• Spare replacement cooling assembly for high thermal load Catalyst 6503 / 7603 chassis
• Network infrastructure requiring non-disruptive hot-swap hardware maintenance

Technical Specifications

• Form Factor: Integrated full chassis fan tray with four independent fans
• Airflow Direction: Side-to-side (right intake, left exhaust facing front panel)
• Maximum Airflow: 270 CFM
• Fan Type: High-speed assembly (standard-speed alternative: FAN-MOD-3)
• Hot Swappable: Yes (OIR supported)
• Power Input: Supplied by chassis backplane
• Monitoring: Front status LED + IOS environmental monitoring & 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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