Install the Second-Generation Cable Management Arm
Follow this procedure to install the second-generation cable management arm (CMA), which you can
use to manage cables connected to the rear of the server.
- Unpack the CMA.
The following figure shows the second-generation CMA components.
Figure 12 Second-Generation CMA Components
1 Connector A
2 Front slide bar
3 Velcro straps (6)
4 Connector B
5 Connector C
6 Connector D
7 Slide-rail latching bracket (used with connector D)
8 Rear slide bar
9 Sun Server X3-2 cable covers
10 Sun Server X3-2L cable covers
- Ensure that the correct cable covers for your server are installed on the
Note - The CMA ships with three, flat cable covers installed. If you are going
to install the CMA on a Sun Server X3-2L, you need to remove
the flat cable covers and install the round cable covers.
- If you are installing the CMA on a Sun Server X3-2L, remove the
flat cable covers and install the round cable covers; otherwise proceed to the
To remove the flat cable covers and install the round cable covers, perform
- Lift up on the cable cover handle (the handle is colored green) and
open it 180 degrees to the horizontal position as shown in the following
figure [frames 1 and 2].
Note - The CMA has three cable covers, two with two hinges (one of which
is shown the following figure), and one with a single hinge. All three
cable covers are shown in Second-Generation CMA Components.
Figure 13 Removing the CMA Flat Cable Covers
- Apply upward pressure to the outside edge of each hinge connector until the
hinge connector comes off the hinge [frame 3].
- Repeat Step a and Step b to remove all three cable covers.
- One at a time, position each round cable cover horizontally over the hinges,
and align the hinge connectors with the hinges.
- Using your thumb, apply downward pressure on each hinge connector to snap the
hinge connector into place.
- Swing the cable covers down and press down on the cable cover handle
to lock them into the closed position.
- Ensure that the six Velcro straps are threaded into the CMA as shown
in Second-Generation CMA Components.
Note - Ensure that the two Velcro straps located on the front slide bar are
threaded through the opening in the top of the slide bar as shown
in Second-Generation CMA Components. This prevents the Velcro straps from interfering with the expansion and contraction
of the slide bar when the server is extended out of the rack
and returned into the rack.
- To make it easier to install the CMA, extend the server approximately 13
cm (5 inches) out of the front of the rack.
- Take the CMA to the back of the equipment rack, and ensure that
you have adequate room to work at the back of the server.
Note - References to “left” or “right” in this procedure assume that you are facing
the back of the equipment rack.
Note - Throughout this installation procedure, support the CMA and do not allow it to
hang under its own weight until it is secured at all four attachment
- Insert the CMA's connector A into the front slot on the left slide-rail
until it locks into place with an audible click [frames 1 and 2].
The connector A tab (see callout 1) goes into the slide-rail's front slot
Gently tug on the left side of the front slide bar to
verify that connector A is properly seated.
Figure 14 Installing Connector A Into the Left Slide-Rail
1 Connector A tab
2 Left slide-rail front slot
- Insert the CMA's connector B into the front slot on the right slide-rail
until it locks into place with an audible click [frames 1 and 2].
The connector B tab (callout 1) goes into the slide-rail front slot (callout
Gently tug on the right side of the front slide bar to
verify that connector B is properly seated.
Figure 15 Installing Connector B Into the Right Slide-Rail
1 Connector B tab
2 Right slide-rail front slot
- To install the CMA's connector C into the right slide-rail, perform the following
- Align connector C with the slide-rail so that the locking spring (callout 1)
is positioned inside (server side) of the right slide-rail [frame 1].
Figure 16 Installing Connector C Into the Right Side-Rail
1 Connector C locking spring
- Insert connector C into the right side-rail until it locks into place with
an audible click [frames 2 and 3].
- Gently tug on the right side of the CMA's rear slide bar to
verify that connector C is properly seated.
- To prepare the CMA's connector D for installation, remove the tape that secures
the slide-rail latching bracket to connector D and ensure that the latching bracket is
properly aligned with connector D [frames 1 and 2].
Note - The CMA is shipped with the slide-rail latching bracket taped to connector
D. You must remove the tape before you install this connector.
Figure 17 Aligning the CMA Slide-Rail Latching Bracket With Connector D
- While holding the slide-rail latching bracket in place, insert connector D and its
associated slide-rail latching bracket into the left slide-rail until connector D locks into place
with an audible click [frames 1 and 2].
Note - When inserting connector D into the slide-rail, the preferred and easier method is
to install connector D and the latching bracket as one assembly into the
Figure 18 Installing Connector D Into the Left Slide-Rail
- Gently tug on the left side of the CMA's rear slide bar to
verify that connector D is properly seated.
Note - The slide-rail latching bracket has a green release tab. This tab is
used to release and remove the latching bracket so that you can remove
- Gently tug on the four CMA connection points to ensure that the CMA
connectors are fully seated before you allow the CMA to hang by its
- To verify that the slide-rails and the CMA are operating properly before routing
cables through the CMA, perform the following steps:
- To prevent the rack from tipping forward when the server is extended, extend
all rack anti-tilt devices.
Caution - To reduce the risk of personal injury, stabilize the rack cabinet and extend
all anti-tilt devices before extending the server from the rack.
For instructions for stabilizing the rack, see Stabilize the Rack for Installation.
- Pull the server from the front of the rack until the CMA is
Figure 19 CMA Fully Extended
- To return the server to the rack, perform the following steps:
- Simultaneously pull and hold the two green release tabs (one on each side
of the server) toward the front of the server (see the following figure)
while you push the server into the rack. As you push the server
into the rack, verify that the CMA retracts without binding.
Note - To pull the green release tabs, place your finger in the center of
each tab, not on the end, and apply pressure as you pull the
tab toward the front of the server.
Figure 20 Location of Slide-Rail Release Tabs
- Continue pushing the server into the rack until the slide-rail locks (on the
front of the server) engage the slide-rail assemblies.
You will hear an audible click when the server is in the
normal rack position.
- Connect cables to the server, as required.
Instructions for connecting the server cables are provided in Cabling the Server.
- Open the CMA cable covers, route server cables through the CMA's cable troughs,
close the cable covers, and secure the cables with the six Velcro straps.
Route the cables through the cable troughs in this order:
- First through the front-most cable trough.
- Then through the small cable trough.
- Then through the rear-most cable trough
Note - When securing the cables with the Velcro straps located on the front slide
bar, ensure that the Velcro straps do not wrap around the bottom of
the slide bar; otherwise, expansion and contraction of the slide bar might be
hindered when the server is extended from the rack and returned to the
Figure 21 CMA With Cables Installed, Cable Covers Closed, and Cables Secured With Velcro straps
- Ensure that the secured cables do no extend above the top or below
the bottom of the server to which they are attached; otherwise, the cables
might snag on other equipment installed in the rack when the server is
extended from the rack or returned to the rack.
Note - If necessary, bundle the cables with additional Velcro straps to ensure that they
stay clear of other equipment. If you need to install additional Velcro straps,
wrap the straps around the cables only, not around any of the CMA
components; otherwise, expansion and contraction of the CMA slide bars might be hindered when
the server is extended from the rack and returned to the rack.