Installing the rack status beacon

You might need to install the rack status beacon. Use the procedure in this section to perform this task.

To install the rack status beacon, you need the following:

Rack status beacon assembly.
Two or more rack status beacon cables. You need one cable to connect the beacon to the junction box and one for each system unit that you want to connect to the beacon.
One or two power cords.
One or more junction boxes for the rack status beacon.
One or more junction box cables.

To install the rack status beacon, follow these steps:

Place the rack status beacon, A, on top of the rack so that the light is pointing to the front of the rack.
Figure 1. Connecting the rack status beacon to the system unit through the junction box.
Plug one end of the rack status beacon cable 1 into the port on the back of the rack status beacon assembly.
Figure 2. Connecting the rack status beacon and system unit to the junction box.
Thread the rack status beacon cable through the rack's cable access cover, B.
Plug the other end of the rack status beacon cable into the output port on the junction box, C.
To connect the junction box to the system unit, plug one end of a rack status beacon cable, 1, into an input port on the junction box.
Plug the other end of the second rack status beacon cable into the beacon port on the system unit. This port is labeled with a beacon symbol.
Note: On some system units, the orientation of the port is rotated.

Figure 3. Rack status beacon port.
To add additional system units to this rack status beacon, repeat steps 4 and 5 for each additional system unit. You can connect multiple junction boxes to add additional system units. Refer to Connect multiple junction boxes.
Plug the power cords into the rack status beacon assembly. Only one power cord is required, but you can use two power cords for backup.
Plug the other end of the power cords into the rack power supply.

If you install the rack status beacon during initial server setup, the initial program load (IPL) will read the rack identification information. If you install the rack status beacon on system units that are running, you will need to start the system again.