HP 5500 Ei 5500 Si Switch Series Installation Guide

							 6  
Installing the switch in a 19-inch rack 
You can install the switch in a 19-inch standard rack by using  different mounting positions. Table 6 
show
s the installation methods available  for the switches of different depths. 
Table 6  Installation methods 
Chassis Depth  Use front 
mounting 
brackets 
onl
y
Use front mounting 
brackets and a rack 
shelf Use front and 
rear mounting 
brackets 
A5500-24G EI (2 slots) 
A5500-24G EI TAA (2 slots) 
A5500-24G SI (2 slots) 
A5500-48G EI (2 slots) 
A5500-48G EI TAA (2 slots) 
A5500-48G SI (2 slots)  300 mm 
(11.81 
in) 
Yes (see 
“
Rack-
mounting by 
using only 
front 
mounting 
brac

kets ”  Yes (see “
Rack-
mounting by using 
front m
ounting 
brackets and a rack 
shelf ”)  No 
A5500-24G-SFP EI (2 slots) 
A5500-24G-SFP EI TAA (2 slots) 
360 mm 
(14.17 
in) 
No  Yes (see “
Rack-
mounting by using 
front m

ounting 
brackets and a rack 
shelf ”)  Yes (see “
Rack-
mounting by 
using front and
 
rear mounting 
brackets ”) 
A5500-24G-PoE+ EI (2 slots) 
A5500-24G-PoE+ EI TAA (2 
slots) 
A5500-24G-PoE+ SI (2 slots) 
A5500-48G-PoE+ EI (2 slots) 
A5500-48G-PoE+ EI TAA (2 
slots) 
A5500-48G-PoE+ SI (2 slots)  420 mm 
(16.54 
in) 
No  Yes (see “
Rack-
mounting by using 
front m

ounting 
brackets and a rack 
shelf ”)  Yes (see “
Rack-
mounting by 
using front and
 
rear mounting 
brackets ”) 
 
 NOTE: 
For a switch with a depth greater than 300 mm (11.81  in), the front mounting brackets are not weight-
bearing. 
  
						

							 7  
Mounting brackets 
Figure 2  Front mounting bracket 
 
(1) Hole for attaching to a rack (by using an M6 screw)
(2) Hole for attaching to the switch chassis  
Figure 3  Rear mounting bracket 
 
(1) Hole for attaching to a rack (by using an M6 screw)  
  NOTE: 
The M6 screws for fixing the brackets to a rack are user supplied. 
 
Table 7 shows the mounting bracket shipme nt for different switch models.  
						

							 8  
Table 7  Mounting bracket kit shipped with th e A5500 EI and A5500 SI switches 
Chassis Front  mountin
g brackets Rear mounting brackets
A5500-24G EI (2 slots) 
A5500-24G EI TAA (2 slots) 
A5500-48G EI (2 slots) 
A5500-48G EI TAA (2 slots) 
A5500-24G SI (2 slots) 
A5500-48G SI (2 slots) One pair  N/A 
A5500-24G-SFP EI (2 slots) 
A5500-24G-SFP EI TAA (2 slots) 
One pair 
One pair 
A5500-24G-PoE+ EI (2 slots) 
A5500-24G-PoE+ EI TAA (2 slots) 
A5500-48G-PoE+ EI (2 slots) 
A5500-48G-PoE+ EI TAA (2 slots) 
A5500-24G-PoE+ SI (2 slots) 
A5500-48G-PoE+ SI (2 slots)  One pair  One pair 
 
Rack-mounting by using only front mounting brackets 
This installation method is available only for the 
A5500-24G EI (2 slots), A5500-24G EI TAA (2 slots), 
A5500-48G EI (2 slots), A5500-48G EI TAA (2 slots), A5500-24G SI (2 slots), and A5500-48G SI (2 
slots) switches.  
This task requires two people.  
To mount a switch in a 19-inch standard rack  by using only the front mounting brackets: 
1. Wear an ESD-preventive wrist strap and make sure  it makes good skin contact and is properly 
grounded. 
2.  Check that the rack is properly grounded and can  support the weight of the switch chassis and all 
its accessories. 
3.  Unpack the front mounting brackets and the screws fo r fixing the brackets to the switch chassis.  
4. Align the round holes in one bracket with the holes in the front mounting position of the switch 
chassis, and use the screws to fix the moun ting bracket to the chassis, as shown in Figure 4.  
5. Repeat the previous step to  attach the other mounting bracket to the chassis.   
						

							 9  
Figure 4  Attaching the front mounting  brackets to the chassis 
 
(1) Front panel of the switch  (2) Front mounting bracket 
(3) Screw  
6. Install cage nuts (user-supplied) in th e mounting holes in the rack posts.  
7. One person holds the switch chassis and aligns th e oval holes in the brackets with the mounting 
holes in the rack posts, and the  other person fixes the mounting  brackets with M6 screws (user-
supplied) to the rack, as shown in  Figure 5. 
Figure 5  Attaching th

e front mounting  brackets to the rack 
2
1
1
34
 
(1) Front square-holed post  (2) Front panel 
(3) Screw for fixing the front mounting brackets to the square-holed post  (4) Front mounting bracket  
						

							 10  
 
Rack-mounting by using front mounting brackets and a rack 
shelf 
This installation method is available for all A5500 EI and A5500 SI switches. 
To mount a switch in a 19-inch rack by using  the front mounting brackets and a rack shelf: 
1. Wear an ESD-preventive wrist strap and make sure  it makes good skin contact and is properly 
grounded.  
2.  Check that the rack is properly grounded and can  support the weight of the switch chassis and all 
its accessories. 
3.  Fix the rack shelf horizontally in a proper position in the rack. 
4. Unpack the front mounting brackets and the screws  for fixing the brackets to the switch chassis. 
5. Align the round holes in one bracket with the holes in the front mounting position of the switch 
chassis, and use the removed screws to fix the  mounting bracket to the chassis, as shown in Figure 
4. 
6.  Repeat the previous step to  attach the other mounting bracket to the chassis.  
7. Install cage nuts (user-supplied) in th e mounting holes in the rack posts.  
8. Place the switch on the rack shelf, push it into th e rack until the brackets touch the rack posts, and 
fix the mounting brackets wi th M6 screws (user-supplied) to the rack, as shown in  Figure 5. 
Rack-mounting by using front and rear mounting brackets 
This installation method is available only for the  A5500-24G-PoE+ EI (2 slots), A5500-24G-PoE+ EI TAA 
(2 slots), A5500-48G-PoE+ EI (2 slots), A5500-48G-PoE+ EI TAA (2 slots), A5500-24G-PoE+ SI (2 slots), 
A5500-48G-PoE+ SI (2 slots), A5500-24G-SFP EI (2 slots), and A5500-24G-SFP EI TAA (2 slots) 
switches.  
This task requires two people.  
To install the switch in a 19-inch rack by  using the front and rear mounting brackets: 
1. Wear an ESD-preventive wrist strap and make sure  it makes good skin contact and is properly 
grounded. 
2.  Unpack the front mounting brackets and the screws  for fixing the brackets to the switch chassis. 
3. Align the round holes in one front mounting bracket  with the holes in the front mounting position of 
the switch chassis, and use the removed screws to  fix the mounting bracket to the chassis, as shown 
in  Figure 4 . 
4. Repeat the previous step to  attach the other front mounting bracket to the chassis.  
5. Unpack the rear mounting brackets  and the load-bearing screws.   
						

							 11  
6.
 
Fix the load-bearing screws in one of the re ar mounting positions (see callout 2 in Figure 6 ) as 
needed.  
The A
5500-24G-SFP EI (2 slots) and A5500-24G-SFP EI TAA (2 slots) switches have only two of the 
rear mounting positions.  
Figure 6  Attaching the front mounting brackets and  load-bearing screws to the switch chassis 
  
(1) Load-bearing screw  (2) Rear mounting positions 
(3) Front panel (4) Front mounting bracket
(5) Screw for fixing the front mounting brackets to the switch 
 NOTE: 
The rear mounting brackets must closely contact wi th the load-bearing screws to support the chassis 
weight.  
7. Install cage nuts (user-supplied) in the mounti ng holes in the front and rear rack posts.   
						

							 12  
8.
 
Fix the rear mounting brackets to the rear post s with M6 screws (user supplied), as shown in  Figure 
7.  
Figure 7  Attaching th
e rear mounting brackets to a rack 
 
(1) Rear square-holed post  (2) Rear mounting bracket   
						

							 13  
9.
 
One person supports the chassis bottom with one ha nd, holds the front part of the chassis with the 
other hand, and pushes the chassis into the rack gently.  
Make sure that the load-bearing screws closely co ntact with the upper edges of the rear mounting 
brackets, as shown in  Figure 8. 
Figure 8  Mounting the 

switch in the rack 
 
(1) Rear panel  (2) Rear square-holed post 
(3) Load-bearing screw(4) Rear mounting bracket  
						

							 14  
10.
 
The other person aligns the oval holes in the front  brackets with the mounting holes in the front rack 
posts, and fixes the front mounting brackets with M6  screws (user supplied) to the front rack posts, 
as shown in  Figure 9.  
Make sure that front and r
 ear mounting brackets have  securely fixed the switch in the rack. 
Figure 9  Attaching the front brackets to the rack 
12
3
4
5
6
 
(1) Load-bearing screw (2) Rear mounting bracket 
(3) Front panel (4) Screw used to fix front mounting brackets to front brackets
(5) Front mounting bracket (6) Front square-holed post  
						

							 15  
Mounting the switch on a workbench 
 
  IMPORTANT: 
•
  Ensure good ventilation and 10 cm (3.9 in) of clearance around the chassis for heat dissipation.  
 
To mount the switch on a workbench: 
1. Check that the workbench is sturdy and properly grounded.  
2. Place the switch bottom up, and clean the round ho les in the chassis bottom with a dry cloth.  
3. Attach the rubber feet to the four roun d holes in the bottom of the chassis.  
4. Place the switch upside up on the workbench. Avoid placing heavy objects on the switch. 
Grounding the switch 
 
 WARNING! 
Correctly connecting the switch grounding cable is cr ucial to lightning protection and EMI protection. 
The power and grounding terminals in this section are for illustration only. 
The power input end of the switch has a noise filter, whose central ground is directly connected to the 
chassis to form the chassis ground (commonly known as PGND). You must securely connect this chassis 
ground to the earth so the faradism and leakage el ectricity can be safely released to the earth to 
minimize EMI susceptibi lity of the switch. 
You can ground the switch in one of the follow ing ways, depending on the grounding conditions 
available at the installation site: 
•   Grounding the switch with a grounding strip 
•   Grounding the switch with a grounding  conduct
 or buried in the earth ground 
•   Grounding the switch by using the AC power cord 
Grounding the switch with a grounding strip  
 WARNING! 
Connect the 
grounding cable to the grounding system in the equipment room. Do not connect it to a fire 
main or lightning rod.  
If a grounding strip is available at the installation site, connect the grounding cable to the grounding 
strip. 
To connect the grounding cable, for example, to an A5500-48G EI (2 slots) switch: 
1.  Identify the grounding point (with a grounding sign ) on the rear panel of the switch chassis, and 
remove the grounding screw from the grounding point. 
2.  Attach the grounding screw to the OT  terminal of the grounding cable. 
3. Use a screwdriver to fasten the grounding screw into the grounding screw hole.