Cisco FAN-MOD-4HS Full English Description

Product Overview

Important Note: This fan tray is chassis-dedicated hardware. It cannot be interchanged with FAN-MOD-3, FAN-MOD-3HS, FAN-MOD-6 and other fan trays for Catalyst 6500 / 7600 series different chassis variants. Individual fans inside the tray are not field-replaceable; the entire tray must be replaced once any internal fan fails. Operating the chassis without an installed fan tray triggers critical thermal alarms and may lead to permanent hardware damage caused by overheating.

Key Features

1. Intelligent Variable-Speed Thermal Regulation

   The fan tray dynamically adjusts fan rotational speed based on real-time chassis temperature, operating altitude and network workload. Fans operate at low RPM under light traffic loads to reduce acoustic noise and automatically boost airflow under high-temperature operating conditions. Real-time thermal telemetry is transmitted to Cisco IOS for continuous environmental monitoring. It supports maximum airflow up to300 CFMat full speed to satisfy high-power module thermal requirements.
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 6504-E and 7604 chassis mechanical design, guaranteeing balanced heat dissipation for high-performance supervisors and multi-gigabit line cards. It fits standard rack deployments in enterprise wiring closets and service provider edge rooms.
3. OIR (Online Insertion and Removal) Support

   Technicians can replace the whole fan tray without powering off or rebooting Catalyst 6504-E switch or Cisco 7604 router. Equipped with ergonomic handles and captive screws, it supports convenient tool-free installation and removal to minimize maintenance downtime for mission-critical networks.
4. Front Panel Visual Status LED & Remote Monitoring

   Status LED 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 after fan faults are detected.

1. Built-In Multi-Fan Redundancy

   Eight 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 bearing fan assembly engineered for 24/7 continuous operation in enterprise campus distribution networks and ISP edge routing environments. Optimized to dissipate heat generated by high-density interface modules and PoE hardware.

Supported Hardware Platforms

• Catalyst 6504-E (4-slot modular switch chassis)
• Cisco 7604 (4-slot modular service router chassis)

Not compatible: Catalyst 6503/6503-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 6504-E modular switches
• Service provider edge networking infrastructure using Cisco 7604 routers
• Spare replacement cooling assembly for failed fan trays on Catalyst 6504-E / 7604 chassis
• Mission-critical network infrastructure requiring non-disruptive hot-swap hardware maintenance

Technical Specifications

• Form Factor: Integrated full chassis fan tray with eight independent fans
• Airflow Direction: Side-to-side (right intake, left exhaust facing front panel)
• Maximum Airflow: 300 CFM
• Fan Type: High-speed fan assembly
• 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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