Installing or replacing the cable-management arm: 2145-92F

Use these procedures to install the cable-management arm (CMA) for the 2145-92F expansion enclosure. You can also use these procedures to replace a faulty CMA assembly.

About this task

As part of the initial installation of the 2145-92F expansion enclosure, you must attach the CMA. You might also need to replace a faulty CMA with a new one from FRU stock.

The cable management arm (CMA) consists of an upper arm and a lower arm assembly, as Figure 1 shows.

Figure 1. Upper and lower cable-management arms

As Figure 2 shows, the support rail connectors of each CMA assembly are installed on the rail hooks at the end of the support rails.

Figure 2. Upper and lower cable-management arms

1. Remove the loop straps from the upper and lower CMA assemblies. The straps are used only for shipping.

Installing the upper CMA assembly

Figure 3 shows the connectors on the upper CMA assembly.

Figure 3. Connectors for the cable management arm

•  1  Inner connector on upper CMA
•  2  Connector base on inner rail member
•  3  Outer connector on upper CMA
•  4  Connector base on outer rail member
•  5  Support rail connector on upper CMA
•  6  Connector base on outer rail member

2. Install the inner connector of the upper CMA assembly ( 1 ) to the inner member of the left support rail ( 2 ), as shown in Figure 4 from the outer and inner support rails.
   Figure 4. Install the inner connector of the upper CMA to the inner member of the support rail

   
3. Install the inner connector of the upper CMA assembly ( 3 ) to the inner member of the left support rail ( 4 ), as shown in Figure 5.
   Figure 5. Install the inner connector of the upper CMA to the inner member of the support rail

   
4. Attach the support rail connector on the upper CMA assembly ( 5 ) to the connector base on the right support rail ( 6 ), as shown in Figure 6.
   Figure 6. Attach the support rail connector of the upper CMA to the right support rail

   

   Ensure the cable-management arm connector attaches securely to the hooks on the rails.

Installing the lower CMA assembly

Note: The procedure for attaching the lower CMA assembly is the same as the procedure to attach the upper CMA assembly. However, the connector locations are reversed. For comparison, Figure 7 shows the upper and lower CMA assemblies as they are aligned to the support rails. The support rail connector of the upper CMA attaches to the right rail. The support rail connector of the lower CMA  11  attaches to the left rail.

Figure 7. Comparing the location of the components of the CMA assemblies

•  7  Inner connector on lower CMA
•  8  Connector base on inner rail member
•  9  Outer connector on lower CMA
•  10  Connector base on outer rail member
•  11  Support rail connector the lower CMA
•  12  Connector base on outer rail member

5. Install the inner connector of the lower CMA assembly ( 7 ) to the inner member of the right support rail ( 8 ), as shown in Figure 7).
6. Install the outer connector of the lower CMA assembly ( 9 ) to the outer member of the right support rail  10 , as shown in Figure 7.
7. Attach the support rail connector on the lower CMA assembly ( 11 ) to the connector on the left support rail ( 12 ), as shown in Figure 7. Ensure that the lower CMA assembly is securely attached to the hooks on the end of the support rails.
8. Route the cables and power cords on the CMA. If needed, secure them with cable ties or hook-and-loop fasteners.
   Notes:

   • Use the cable straps that are provided on the rear of the system to retain the cables and prevent them from sagging.
   • Allow slack in all of the cables to avoid tension in the cables as the CMA moves.
9. Reconnect the power cords and other cables, as needed.