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EX4000 Site Guidelines and Requirements

Environmental Requirements and Specifications for EX4000 Switches

You must install the switch in a rack or cabinet. You must house it in a dry, clean, well-ventilated, and temperature-controlled environment.

Follow these environmental guidelines:

  • Ensure that the site is as dust-free as possible. Dust can clog air intake vents and filters, reducing the efficiency of the switch cooling system.

  • Maintain ambient airflow for normal switch operation. If the airflow is blocked or restricted, or if the intake air is too warm, the switch might overheat. If the switch overheats, the switch temperature monitor may shut down the device to protect the hardware components.

The following are the required environmental conditions for normal switch operation of EX4000 switches.

  • Operating Temperature (EX4000-8P, EX4000-12T, EX4000-24P, EX4000-24T, EX4000-24MP, EX4000-48P, EX4000-48T, and EX4000-48MP)

    • Sea Level: 0 to 50 °C

    • Up to 5000 ft (1500 m): 0 to 45 °C

    • Up to 10000 ft (3000 m): 0 to 40 °C

  • Operating Temperature (EX4000-12P and EX4000-12MP)

    • Sea Level: 0 to 45 °C

    • Up to 5000 ft (1500 m): 0 to 40 °C

    • Up to 10000 ft (3000 m): 0 to 35 °C

  • Operating Altitude

    • 10000 ft (3,000 m)

  • Operating relative humidity

    • 5% to 90% at 40 °C (non-condensing)

  • Storage temperature

    • 25 to 70 °C (-13 °F to 158 °F)

  • Storage Altitude

    • 15,000 ft (4500 m)

  • Storage relative humidity

    • 5% to 95% at 65 °C (non-condensing)

  • Seismic tolerance: Tested for Zone 4 earthquake safety.

Note:

For EX4000-8P, EX4000-12P, and EX4000-12MP maximum operating temperature is limited to 40° C and 45° C, Sea Level respectively for Under the Desk mounting. For rack mounting of fanless switches (EX4000-8P, EX4000-12P , EX4000-12T, and EX4000-12MP), 2RU clearance is required above the unit.
Note:

Industrial grade SFP+ optics (1GE/10GE) is required for all fanless switches (EX4000-8P, EX4000-12P , EX4000-12T, and EX4000-12MP) above 35 °C (for Under the Desk mounting ) and 40 °C (for all other mounting orientations) operating ambient temperature.
Note:

Install the EX4000 switch only in restricted areas, such as dedicated equipment rooms and equipment closets. Install the switch in accordance with Articles of the National Electrical Code, ANSI/NFPA 70.
Note:

For EX4000-12MP, maximum operating temperature is limited to 40 °C, sea level for Under the Desk mounting. For rack mounting of EX4000-12MP, 2RU clearance is required above the unit.

Industrial grade SFP+ optics (1GE/10GE) is required for EX4000-12MP above 35 °C (for Under the Desk) and 40 °C (for all other mounting orientations) operating ambient temperature.

General Site Guidelines

Efficient device operation requires proper site planning. For the device to operate properly, you must ensure maintenance and proper layout of the equipment, rack or cabinet, and wiring closet.

To plan and create an acceptable operating environment for your device and prevent environmentally caused equipment failures:

  • Keep the area around the chassis free from dust and conductive material, such as metal flakes.

  • Follow the prescribed airflow guidelines to ensure that the cooling system functions properly. Ensure that the exhaust from other equipment does not blow into the intake vents of the device.

  • Follow the prescribed electrostatic discharge (ESD) prevention procedures to prevent damaging the equipment. Static discharge can cause components to fail completely or intermittently over time.

  • Install the device in a secure area, so that only authorized personnel can access the device.

Site Electrical Wiring Guidelines

Table 1 describes the factors you must consider while planning the electrical wiring at your site.

Warning:

You must provide a properly grounded and shielded environment and use electrical surge-suppression devices.

Avertissement Vous devez établir un environnement protégé et convenablement mis à la terre et utiliser des dispositifs de parasurtension.
Table 1: Site Electrical Wiring Guidelines

Site Wiring Factor

Guidelines

Signaling limitations

If your site experiences any of the following problems, consult experts in electrical surge suppression and shielding:

  • Radio frequency interference (RFI) because of improperly installed wires

  • Damage from lightning strikes occurring when wires exceed recommended distances or pass between buildings

  • Damage to unshielded conductors and electronic devices as a result of electromagnetic pulses (EMPs) caused by lightning

Radio frequency interference

To reduce or eliminate RFI from your site wiring, do the following:

  • Use a twisted-pair cable with a good distribution of grounding conductors.

  • If you need to exceed the recommended distances, use a high-quality twisted-pair cable with one ground conductor for each data signal, when applicable.

Electromagnetic compatibility

If your site is susceptible to problems with electromagnetic compatibility (EMC), particularly from lightning or radio transmitters, seek expert advice.

Strong sources of electromagnetic interference (EMI) can cause:

  • Destruction of the signal drivers and receivers in the device.

  • Electrical hazards as a result of power surges conducted over the lines into the equipment.

Rack Requirements

You can mount the device on two-post racks or four-post racks.

Rack Requirement

Guidelines

Rack type

A U is the standard rack unit defined by the Electronic Components Industry Association (ECIA) (http://www.ecianow.org).

You can mount the device on a rack that provides bracket holes or hole patterns spaced at 1U (1.75 in. or 4.45 cm) increments and meets the size and strength requirements to support the weight.

Mounting bracket hole spacing

The holes in the mounting brackets are spaced at 1U (1.75 in. or 4.45 cm) so that the device can be mounted in any rack that provides holes spaced at that distance.

Rack size and strength

Ensure that the:

  • Rack complies with the size and strength standards of a 19-in. rack as defined by the ECIA (http://www.ecianow.org).

  • Rack rails are spaced widely enough to accommodate the external dimensions of the device chassis. Also ensure that the outer edges of the front mounting brackets extend the width of the chassis to 19 in. (48.2 cm).

  • Rack is strong enough to support the weight of the device.

  • Spacing of rails and adjacent racks provides for proper clearance around the device and rack.

  • The 8 and 12 port device can be mounted on a 2 post rack by using 2-post RMK

  • The 24 and 48 port device can be mounted on a 2 post rack using 2-post RMK or on a 4-post rack using 4-post RMK.

    For 4-post Installations:

    • If you are mounting a device/switch flush with the front posts of a rack, ensure the minimum distance between front and rear post shall be 24.0 in. (60.96 cm) and extendable upto 31.5 in. (80.00 cm).

    • If you are mounting a switch in a recessed position (using the EX-4PST-RMK) from the front posts of a rack, ensure the minimum distance between front and rear post shall be 26.0 in. (66.04cm) and extendable upto 31.5 in. (80.00 cm).

Rack connection to building structure

  • Secure the rack to the building structure.

  • If your geographical area is earthquake-prone, secure the rack to the floor.

  • Secure the rack to the ceiling brackets as well as wall or floor brackets for maximum stability.

Cabinet Requirements for EX4000 Switches

You can mount the device in a cabinet that contains a 19-in. rack.

Table 2 describes the cabinet requirements and specifications.

Table 2: Cabinet Requirements and Specifications

Cabinet Requirement

Guidelines

Cabinet size

Cabinet clearance

  • The outer edges of the front mounting brackets extend the width of the chassis to 19 in. (48.2 cm).

  • The 8 and 12 port device can be mounted on the front posts of a rack inside a cabinet by using 2-post RMK.

  • The 24 and 48 port devices can be mounted on the front posts of a rack inside a cabinet by using the 2-post RMK or on a 4-post rack inside the cabinet using 4-post RMK.

  • For 4-post Installations:

    • If you are mounting a device/switch flush with the front posts of a rack inside the cabinet, ensure the minimum distance between front and rear post shall be 24.0 in. (60.96 cm) and extendable upto 31.50 in (80.0 cm).

    • If you are mounting a switch in a recessed position (using the EX-4PST-RMK) from the front posts of a rack, ensure the minimum distance between front and rear post shall be 26.0 in. (66.04cm) and extendable upto 31.5 in. (80.00 cm).

Cabinet airflow requirements

When you mount the device in a cabinet, ensure that ventilation through the cabinet is sufficient to prevent overheating, as follows:

  • Ensure adequate cool air supply to dissipate the thermal output of the device or devices.

  • Ensure that the hot air exhaust of the chassis exits the cabinet without recirculating into the device. An open cabinet (without a top or doors) that employs hot air exhaust extraction from the top ensures the best airflow through the chassis. If the cabinet contains a top or doors, perforations in these elements assist with removing the hot air exhaust.

  • Install the device in the cabinet in a way that maximizes the open space on the side of the chassis that has the hot air exhaust.

  • Route and secure all cables to minimize the blockage of airflow to and from the chassis.

  • Ensure that the spacing of rails and adjacent cabinets is such that proper clearance exists around the device and cabinet.

  • A cabinet larger than the minimum required provides better airflow and reduces the chance of overheating.

Clearance Requirements for Airflow and Hardware Maintenance for EX4000 Switches

When planning the site for installing an EX4000 switch, you must allow sufficient clearance around the installed switch.

See:

  • Figure 1 for clearance requirements for airflow and hardware maintenance for EX4000-8P and EX4000-12T switches.

  • Figure 2 for clearance requirements for airflow and hardware maintenance for EX4000-12P and EX4000-12MP switches.

  • Figure 3 for clearance requirements for airflow and hardware maintenance for EX4000-24P, EX4000-24MP, and EX4000-48T switches.

  • Figure 4 for clearance requirements for airflow and hardware maintenance for EX4000-24T switches.

  • Figure 5 for clearance requirements for airflow and hardware maintenance for EX4000-48P and EX4000-48MP switches.

Figure 1: Clearance Requirements for Airflow and Hardware Maintenance for the EX4000-8P and EX4000-12T Switch Clearance Requirements for Airflow and Hardware Maintenance for the EX4000-8P and EX4000-12T Switch
Note:

Do not block the vents on the top cover of the switches in any of the mounting conditions to prevent overheating of the switch chassis. Ensure 2 rack unit clearance on the top side for airflow/cooling.
Figure 2: Clearance Requirements for Airflow and Hardware Maintenance for the EX4000-12P and EX4000-12MP Switch Clearance Requirements for Airflow and Hardware Maintenance for the EX4000-12P and EX4000-12MP Switch
Note:

Do not block the vents on the top cover of the 12 port switches in any of the mounting conditions to prevent overheating of the switch chassis. Ensure 2 rack unit clearance on the top side for airflow/cooling.
Figure 3: Clearance Requirements for Airflow and Hardware Maintenance for the EX4000-24P, EX4000-24MP, and EX4000-48T Switch Clearance Requirements for Airflow and Hardware Maintenance for the EX4000-24P, EX4000-24MP, and EX4000-48T Switch
Figure 4: Clearance Requirements for Airflow and Hardware Maintenance for the EX4000-24T Switch Clearance Requirements for Airflow and Hardware Maintenance for the EX4000-24T Switch
Figure 5: Clearance Requirements for Airflow and Hardware Maintenance for the EX4000-48P and EX4000-48MP Switch Clearance Requirements for Airflow and Hardware Maintenance for the EX4000-48P and EX4000-48MP Switch

  • For the cooling system to function properly, the airflow around the chassis must be unrestricted.

  • If you are mounting the switch in a rack or cabinet with other equipment, or if you are placing it on the desktop or floor near other equipment, ensure that the exhaust from other equipment does not blow into the intake vents of the chassis.

  • Leave at least 24 in. (61 cm) in front of the switch and behind the switch for service personnel to remove and install hardware components. It is recommended that you allow at least 24 in. (60.96 cm) in front of the rack or cabinet and 24 in. (61 cm) behind the rack or cabinet.