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SRX5400 Rack and Cabinet Requirements

SRX5400 Services Gateway Rack Size and Strength Requirements

The size, strength, and location of the rack must accommodate the services gateway's weight and external dimensions. The location of the rack must allow for the clearance requirements specified in .

The chassis is 17.37 in. (44.11 cm) wide. The services gateway is designed for installation in a standard 19-in. rack, as defined in Cabinets, Racks, Panels, and Associated Equipment (document number EIA-310-D) published by the Electronics Industry Association ( The spacing of the holes between the left and right front-mounting flanges and center-mounting brackets is 18.31 in (465 mm) apart. However, the inside spacing between the rack rails must allow sufficient space for the width of the chassis.

With the use of adapters or approved wing devices to narrow the opening between the rails, the services gateway can fit into a 600-mm-wide rack, as defined in the four-part Equipment Engineering (EE); European telecommunications standard for equipment practice (document numbers ETS 300 119-1 through 119-4) published by the European Telecommunications Standards Institute (

Observe these guidelines:

  • The rack must have sufficient vertical usable space to accommodate the height of the services gateway: 8.75 in. (22.23 cm) high (approximately 5 U). You can stack eight services gateways in a rack that is at least 48 U (89.3 in. or 2.24 m) in height if it has a 1 in cap between.


    A U is the standard rack unit defined in Cabinets, Racks, Panels, and Associated Equipment.

  • The location of the rack must provide sufficient space to accommodate the depth of the services gateway. The chassis is 24.5 in. (62.2 cm) deep.

  • The rack must be strong enough to support the weight of the fully configured device, up to 220 lb (100 kg). If you stack five fully configured devices in one rack, it must be capable of supporting up to 1100 lb (500 kg).

Spacing of Rack Mounting Bracket Holes for the SRX5400 Services Gateway

The services gateway can be mounted in any rack that provides holes or hole patterns spaced at 1 U (1.75 in.) increments. The mounting brackets used to attach the chassis to a rack are designed (as per EIA-310-D specifications) to fasten to holes spaced at those distances.

Connection to Building Structure for the SRX5400 Services Gateway Rack

Always secure the rack to the structure of the building. If your geographical area is subject to earthquakes, bolt the rack to the floor. For maximum stability, also secure the rack to ceiling brackets.

SRX5400 Services Gateway Cabinet Size and Clearance Requirements

The minimum size cabinet that can accommodate the device is 482 mm wide and 800 mm deep. A cabinet larger than the minimum requirement provides better airflow and reduces the chance of overheating. To accommodate a single device, the cabinet must be at least 13 U high. If you provide adequate cooling air and airflow clearance, you can stack five devices in a cabinet that has at least 48 U (84 in. or 2.13 m) of usable vertical space.

The minimum front and rear clearance requirements depend on the mounting configuration you choose. The minimum total clearance inside the cabinet is 30.7 in. between the inside of the front door and the inside of the rear door.

SRX5400 Services Gateway Cabinet Airflow Requirements

When you mount the device in a cabinet, you must ensure that ventilation through the cabinet is sufficient to prevent overheating. Following is a list of requirements to consider when planning for chassis cooling:

  • Ensure that the cool air supply you provide through the cabinet can adequately dissipate the thermal output of the device.

  • Ensure that the cabinet allows the chassis hot exhaust air to exit from the cabinet without recirculating into the device. An open cabinet (without a top or doors) that employs hot air exhaust extraction from the top allows 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 as close as possible to the front of the cabinet so that the cable management system just clears the inside of the front door. This maximizes the clearance in the rear of the cabinet for critical airflow.

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