Cisco ONS 15454 - DLP-A 7 Mount Multiple Shelf Assemblies in a Rack

1-11
Cisco ONS 15454 Procedure Guide, R4.0
March 2003
Chapter 1 Install the Shelf and Backplane Cable
NTP-A2 Install the Shelf Assembly
Step 7 When the shelf assembly is secured to the rack, install the remaining mounting screws.
Note Use at least one set of the horizontal screw slots on the ONS 15454 to prevent slippage.
Step 8 Remove the temporary set screws.
Step 9 Return to your originating procedure (NTP).
DLP-A7 Mount Multiple Shelf Assemblies in a Rack
Note The ONS 15454 must have one inch (25.4 mm) of airspace below the installed shelf assembly to allow
air flow to the fan intake. If a second ONS 15454 is installed underneath a shelf assembly, the air ramp
on top of the bottom shelf assembly provides the desired space. However, if the ONS 15454 is installed
above third-party equipment, you must provide a minimum spacing of one inch (25.4 mm) between the
third-party shelf assembly and the bottom of the ONS 15454. The third-party equipment must not vent
heat upward into the ONS 15454.
Step 1 Verify that the proper fuse and alarm panel has been installed in the top mounting space. If a fuse and
alarm panel is not present, you must install one according to manufacturer’s instructions.
• If installing the 15454-SA-ANSI shelf assembly, a 100-A fuse panel (30-A fuse per shelf minimum)
is required.
• If installing the 15454-SA-NEBS3 shelf assembly, a standard 80-A fuse panel (20-A fuse per shelf
minimum) is required.
Step 2 Mount the first ONS 15454 directly below the fuse and alarm panel using the “DLP-A5 Mount the Shelf
Assembly in a Rack (One Person)” task on page 1-9 or the “DLP-A6 Mount the Shelf Assembly in a
Rack (Two People)” task on page 1-10.
Step 3 Repeat the task with the second and third (fourth if applicable) ONS 15454s.
Step 4 Return to your originating procedure (NTP).
Purpose This task allows multiple shelves to be assembled in a rack.
Tools/Equipment #2 Phillips screwdriver
Medium slot-head screwdriver
Small slot-head screwdriver
Prerequisite Procedures DLP-A3 Reverse the Mounting Bracket to Fit a 19-inch (482.6 mm) Rack,
page 1-6, if applicable
DLP-A4 Install the External Brackets and Air Filter, page 1-8, if applicable
Required/As Needed As needed
Onsite/Remote Onsite
Security Level None