Juniper CBL-M40-PWR-AU ユーザーズマニュアル
Prepare the Site
Rack Requirements
41
The rack rails must be spaced widely enough to accommodate the router chassis’s external
dimensions: 35 in. (89 cm) high, 23.5 in. (60 cm) deep, and 17.5 in. (44.5 cm) wide. The
outer edges of the front- and center-mounting ears extend the width to 19 in. (48.3 cm). The
spacing of rails and adjacent racks must also allow for the clearances around the router and
rack that are specified in “Clearance Requirements for Airflow and Hardware Maintenance”
on page 42.
dimensions: 35 in. (89 cm) high, 23.5 in. (60 cm) deep, and 17.5 in. (44.5 cm) wide. The
outer edges of the front- and center-mounting ears extend the width to 19 in. (48.3 cm). The
spacing of rails and adjacent racks must also allow for the clearances around the router and
rack that are specified in “Clearance Requirements for Airflow and Hardware Maintenance”
on page 42.
In general, a center-mount rack is preferable to a front-mount rack, because the more even
distribution of weight in the center-mount rack provides greater stability. If a front-mount
rack is used, we recommend supporting the back of the router with a shelf or other structure.
distribution of weight in the center-mount rack provides greater stability. If a front-mount
rack is used, we recommend supporting the back of the router with a shelf or other structure.
The chassis height of 35 in. (89 cm) equals 20 U, the standard rack unit defined in Cabinets,
Racks, Panels, and Associated Equipment (document number EIA-310-D) published by the
Electronics Industry Association. Two routers can be stacked in a rack that has at least 42 U
(73.5 in. or 1.87 m) of usable vertical space.
Racks, Panels, and Associated Equipment (document number EIA-310-D) published by the
Electronics Industry Association. Two routers can be stacked in a rack that has at least 42 U
(73.5 in. or 1.87 m) of usable vertical space.
The rack must be strong enough to support the weight of the fully configured router, up to
about 280 lb (127 kg). If you stack two routers in one rack, it must be capable of supporting
about 560 lb (254 kg).
about 280 lb (127 kg). If you stack two routers in one rack, it must be capable of supporting
about 560 lb (254 kg).
Spacing of Mounting Holes
The mounting holes on the rack rails must align with the mounting holes on the chassis
mounting ears. The chassis is equipped with two different sets of vertical mounting ears, one
set intended for center-mount racks and one set intended for front-mount racks. Table 11 lists
the spacing between mounting holes on these ears.
mounting ears. The chassis is equipped with two different sets of vertical mounting ears, one
set intended for center-mount racks and one set intended for front-mount racks. Table 11 lists
the spacing between mounting holes on these ears.
Table 11: Rack Mounting Hole Spacing
Connection to Building Structure
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. For more information, see “Laser and LED Safety Guidelines and Warnings” on
page 76.
earthquakes, bolt the rack to the floor. For maximum stability, also secure the rack to ceiling
brackets. For more information, see “Laser and LED Safety Guidelines and Warnings” on
page 76.
The router might not fit into an 800-mm-deep cabinet,
though adjusting the front-to-back position of the front
mounting rails inside the cabinet might help.
though adjusting the front-to-back position of the front
mounting rails inside the cabinet might help.
If mounting the router in a cabinet, be sure that ventilation
is sufficient to prevent overheating.
is sufficient to prevent overheating.
Router Mounting Rail
Hole Spacing
Front-mounting ear
3 U (5.25 in. or 13.33 cm) and 4 U (7 in. or 17.78 cm)
Center-mounting ear
3 U (5.25 in. or 13.33 cm)