Figure 4. Rear view of a 2077/2078-424 / 2077/2078-AF4 2077 expansion enclosure
Figure 5 on page 7 shows the LEDs and SAS port locations from the rear view of an expansion canister.
• 1 LEDs
• 2 SAS ports
Each canister has two SAS ports that are numbered 1 on the left and 2 on the right. Port 1 is used to
connect to a SAS expansion port on a node canister or port 2 of another expansion canister.
Figure 5. SAS ports and LEDs in rear view of an expansion canister for 2077/2078-424 / 2077/2078-AF4
Expansion enclosure support rails
The left and right expansion enclosure support rails (Figure 6 on page 8) are designed specically for
installation of an expansion enclosure.
• The ledge on the inside of each rail supports the entire length of an expansion enclosure.
• The expansion enclosure support rails capture the left and right rear edges of an inserted expansion
enclosure. This prevents the installed control enclosure bouncing when the rack is subjected to quake
or vibration.
• The expansion enclosure support rails adjust to t racks from 595 mm to 755 mm deep, measured
between the front and rear rack rails.
Chapter 1. Before you begin the installation
7
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