Cisco Firepower 2120 Hardware Installation Manual page 41

Mount and Connect
e) Install the second inner rail to the opposite side of the chassis and secure with the other M3X6mm screw.
Step 3
Open the front securing plate on both slide-rail assemblies. The front end of the slide-rail assembly has a spring-loaded
securing plate that must be open before you can insert the mounting pegs into the rack-post holes.
On the outside of the assembly, push the green arrow button toward the rear to open the securing plate.
Figure 17: Front Securing Mechanism Inside the Front End
1
3
Step 4 Install the slide rails into the rack:
a) Align one slide-rail assembly front end with the front rack-post holes that you want to use.
The slide rail front-end wraps around the outside of the rack post and the mounting pegs enter the rack-post holes
from the outside-front.
The rack post must be between the mounting pegs and the open securing
Note
plate.
b) Push the mounting pegs into the rack-post holes from the outside-front.
c) Press the securing plate release button marked 'PUSH.' The spring-loaded securing plate closes to lock the pegs in
place.
d) Adjust the slide-rail length, and then push the rear mounting pegs into the corresponding rear rack-post holes. The
slide rail must be level front-to-rear.
The rear mounting pegs enter the rear rack-post holes from the inside of the rack post.
e) Attach the second slide-rail assembly to the opposite side of the rack. Make sure that the two slide-rail assemblies
are at the same height with each other and are level front-to-back.
f) Pull the inner slide rails on each assembly out toward the rack front until they hit the internal stops and lock in place.
Step 5 Insert the chassis into the slide rails.
Front mounting pegs
Note Works with square slots,
7.1mm holes, and 10-32
threaded holes.
Rack post
2 Securing plate shown pulled back to open
position
Cisco Firepower 2100 Series Hardware Installation Guide
Rack-Mount the Chassis
37