Aruba S3500-24P User manual

Aruba S3500 Series
Mobility Access Switch
Installation Guide

www.arubanetworks.com
1344 Crossman Avenue
Sunnyvale, California 94089
Phone: [phone]
Fax [phone]
Aruba S3500 Series Wired Access Point | Installation Guide 0510865-04 | October 2011
Copyright
© 2011 Aruba Networks, Inc. Aruba Networks trademarks include , Aruba Networks®, Aruba Wireless
Networks®, the registered Aruba the Mobile Edge Company logo, Aruba Mobility Management System®, Mobile Edge Architecture®,
People Move. Networks Must Follow®, RFProtect®, Green Island®. All rights reserved. All other trademarks are the property of their
respective owners.
Open Source Code
Certain Aruba products include Open Source software code developed by third parties, including software code subject to the GNU
General Public License (GPL), GNU Lesser General Public License (LGPL), or other Open Source Licenses. The Open Source code used
can be found at this site:
http://www.arubanetworks.com/open_source
Legal Notice
The use of Aruba Networks, Inc. switching platforms and software, by all individuals or corporations, to terminate other vendors’ VPN
client devices constitutes complete acceptance of liability by that individual or corporation for this action and indemnifies, in full, Aruba
Networks, Inc. from any and all legal actions that might be taken against it with respect to infringement of copyright on behalf of those
vendors.
Warranty
This hardware product is protected by the standard Aruba warranty of one year parts/labor. For more information, refer to the
ARUBACARE SERVICE AND SUPPORT TERMS AND CONDITIONS.
Altering this device (such as painting it) voids the warranty.

Aruba S3500 Series Wired Access Point | Installation Guide |3
Contents
Preface ................................................................................................................................... 5
Guide Overview .....................................................................................................5
Related Documentation.........................................................................................5
Contacting Support ..............................................................................................6
Chapter 1 S3500 Mobility Access Switch................................................................ 7
Models...................................................................................................................7
Package Checklist.................................................................................................7
Front Panel ............................................................................................................8
10/100/1000 Ethernet Ports..........................................................................10
Port LEDs................................................................................................10
Management/Status LED Indicators .............................................................11
LCD Panel .....................................................................................................12
Disabling the LCD Screen ......................................................................14
Rear Panel ...........................................................................................................15
Management Port .........................................................................................15
Console Port .................................................................................................16
Serial Console Port Adaptor...................................................................17
USB Interface................................................................................................17
SHUTDOWN LED..........................................................................................18
Fan Tray ........................................................................................................18
Hot Swapping.........................................................................................18
Power Supply ...............................................................................................19
Load Sharing ..........................................................................................19
Redundancy ...........................................................................................20
Hot Swapping.........................................................................................20
Modules..................................................................................................20
LEDs .......................................................................................................21
Monitoring...............................................................................................21
PoE .........................................................................................................22
PoE Priority.............................................................................................22
Chapter 2 Installation.............................................................................................. 23
Precautions..........................................................................................................23
Selecting a Location............................................................................................24
Two-Point Rack Mounting...................................................................................25
Required Tools and Equipment ....................................................................25
Installation Steps...........................................................................................25
Four-Point Rack Mounting ..................................................................................27
Required Tools and Equipment ....................................................................27
Installation Steps...........................................................................................27
Table or Shelf Installation ....................................................................................30
Required Tools and Equipment ....................................................................30
Installation Steps...........................................................................................30
Connecting the AC Power Cord..........................................................................30
Installing and Removing a Fan Tray ....................................................................31
Installing and Removing a Power Supply............................................................32

4|Aruba S3500 Series Wired Access Point | Installation Guide
Installing a Power Supply..............................................................................32
Removing a Power Supply............................................................................33
Chapter 3 Uplink Module and Stacking.................................................................35
10GBASE-X Port .................................................................................................35
10GBASE-X Port LEDs........................................................................................36
SFP and SFP+ Modules ......................................................................................36
Direct Attach Cables............................................................................................37
Installing an Uplink Module .................................................................................38
Required Tools and Equipment ....................................................................38
Installation Steps...........................................................................................38
Removing Uplink Module..............................................................................39
Installing an SFP..................................................................................................39
Removing an SFP .........................................................................................39
Connecting an LC Fiber Optic Cable ............................................................40
Installing a Direct Attach Cable ...........................................................................41
DAC Removal................................................................................................41
Stacking...............................................................................................................42
The Stacking Protocol...................................................................................42
Auto Discovery .......................................................................................42
Planning a Stack ...........................................................................................42
Creating a Stack............................................................................................43
Chapter 4 Specifications, Safety, and Compliance.............................................. 45
S3500 Specifications...........................................................................................45
Physical.........................................................................................................45
Power Specifications (AC Input Requirements)............................................45
Operating Specifications...............................................................................45
Storage Specifications..................................................................................45
Uplink Module Specifications..............................................................................46
Physical.........................................................................................................46
Operating Specifications...............................................................................46
Storage Specifications..................................................................................46
Safety and Regulatory Compliance.....................................................................46
Electromagnetic Interference ........................................................................46
United States ..........................................................................................46
Canada ...................................................................................................47
Japan......................................................................................................47
Europe ....................................................................................................47
Battery Statements .......................................................................................47
Proper Disposal of Aruba Equipment..................................................................48
Waste of Electrical and Electronic Equipment..............................................48
European Union RoHS..................................................................................48
China RoHS ..................................................................................................48

Aruba S3500 Series Wired Access Point | Installation Guide Preface | 5
Preface
This document describes the hardware features of the Aruba S3500 Series Mobility Access Switch. It
provides a detailed overview of the physical and performance characteristics of each mobility access switch
model and explains how to install the mobility access switch and its accessories.
Guide Overview
Chapter 1, “S3500 Mobility Access Switch” on page 7 provides a detailed hardware overview of the S3500
mobility access switch and each of its components.
Chapter 2, “Installation” on page 23 describes how to install the S3500 in a number of ways and how to
install each its components.
Chapter 3, “Uplink Module and Stacking” on page35 provides an overview of the S3500 optional uplink
module and how to install it.
Chapter 4, “Specifications, Safety, and Compliance” on page 45 lists the S3500’s technical specifications
and safety and regulatory compliance information.
Related Documentation
The following documents are referred to in this guide and are considered components of the complete
documentation set needed for successful installation and management of an Aruba S3500 mobility access
switch:
ArubaOS 7.1 User Guide
ArubaOS 7.1 Command Line Interface Reference Guide
ArubaOS 7.1 Quick Start Guide
The latest documentation and this document translated into other languages can be found at
www.arubanetworks.com/documentation.

6| Preface Aruba S3500 Series Wired Access Point | Installation Guide
Contacting Support
Table 1 Web Sites and Emails
Web Site
Main Site http://www.arubanetworks.com
Support Site https://support.arubanetworks.com
Software Licensing Site https://licensing.arubanetworks.com/login.php
Wireless Security Incident Response Team (WSIRT) http://www.arubanetworks.com/support/wsirt.php
Aruba Documentation Site http//www.arubanetworks.com/documentation
Support Emails
Americas and APAC [email protected]
EMEA [email protected]
WSIRT Email
Please email details of any security problem found in an
Aruba product.
[email protected]
Table 2 Contact Phone Numbers
Telephone Numbers
Aruba Corporate [phone]
FAX [phone]
Support
United States 800-WI-FI-LAN (800-943-4526)
Universal Free Phone Service Number (UIFN): Australia, Canada, China,
France, Germany, Hong Kong, Ireland, Israel, Japan, Korea, Singapore,
South Africa, Taiwan, and the UK
+800-4WIFI-LAN ([phone])
All other countries [phone]

Aruba S3500 Series Wired Access Point | Installation Guide S3500 Mobility Access Switch | 7
Chapter 1
S3500 Mobility Access Switch
The Aruba S3500 Mobility Access Switch is a multiport Ethernet mobility access switch that offers Layer 2
and Layer 3 switching and the capability to act as a wired access point (AP).
Models
The S3500 series includes four models that provide varying levels of functionality. Additionally, all models
can be modified using available modules to upgrade the device’s functionality to suit your needs.
Package Checklist
Inform your supplier if there are any incorrect, missing, or damaged parts. If possible, retain the carton,
including the original packing materials (see Table 5). Use these materials to repack and return the unit to
the supplier if needed.
Table 4 Aruba S3500 Mobility Access Switch models
Model Access Ports PoE/PoE+ Ports Minimum Required
Power Supply
Controller
Capable
S3500-24P 24x 10/100/1000Base-T 24 600W Yes
S3500-48P 48x 10/100/1000Base-T 48 600W Yes
S3500-24T 24x 10/100/1000Base-T 0 350W No
S3500-48T 48x 10/100/1000Base-T 0 350W No
Table 5 Package Contents
Item Quantity
Aruba S3500-XX 1
Power Supply Unit - Installed 1
Fan Tray - Installed 1
Blank Panel over Uplink Module bay 1
Blank Panel over unpopulated PSU Intake 1
Aruba Serial Console Cable 1
RJ-45 to DB9 Adapter 1
Rack Mounting Brackets 2
M6 x 15mm Rack Mounting Screws 4

8| S3500 Mobility Access Switch Aruba S3500 Series Wired Access Point | Installation Guide
Front Panel
The front panel of the Aruba S3500 mobility access switch consists of the following components:
24 or 48 10/100/1000BASE-T Ethernet ports
LINK/ACT and Status LEDs
Management/Status LED
LCD Panel and Navigation Buttons
Uplink Module Slot
Figure 1 shows the front panel of the S3500 24-Port and Figure 2 shows the front panel of the S3500 48-Port.
M4 x 6mm Rack Mount Bracket Screws 8
Rubber Feet 4
Aruba S3500 Installation Guide (Printed) 1
End User License Agreement (Printed) 1
Aruba Document Pointer (Printed) 1
Table 5 Package Contents
Item Quantity
Optional accessories, such as SFP modules, are available for use with the Aruba S3500 Series and are sold
separately. Contact your Aruba sales representative for details and assistance.

Aruba S3500 Series Wired Access Point | Installation Guide S3500 Mobility Access Switch | 9
Figure 1 Front Panel of the Aruba S3500 24-Port
Figure 2 Front Panel of the Aruba S3500 48-Port
Table 6 Front Panel Components
Callout Component Description
1 Power, Status, Stack LEDs Used for basic monitoring of the S3500
2 LCD Screen Used for the Quick Setup, controlling the LED behavior, and other
basic configurations
3 Menu and Enter Buttons Used to navigate the LCD screen
4 Access Ports 10/100/1000 Ethernet Ports
5
4
1
23
5
4
1
23

10 | S3500 Mobility Access Switch Aruba S3500 Series Wired Access Point | Installation Guide
10/100/1000 Ethernet Ports
Depending on the model, the S3500 is equipped with 24 or 48 10/100/1000BASE-T Gigabit Ethernet (RJ-45)
ports. Gigabit Ethernet uses all eight wires and each pair is used in a bi-directional fashion, meaning the
same pairs are used for both data transmission and reception. Figure 3 illustrates the CAT-5 pin-out found
on an RJ-45 connector. The CAT-5 pin-out pairs the following pins on a 10/100/1000Base-T Gigabit Ethernet
port: 1/2, 3/6, 4/5, and 7/8. These ports support IEEE 802.3af Power over Ethernet (PoE), providing up to
15.4 W of DC power, as a power sourcing equipment (PSE) device, to connected devices. Additionally, the
ports can be configured to provide IEEE 802.3at Power over Ethernet Plus (PoE+), supplying up to 30.0 W
of DC power to connected devices.
For more information on PoE and S3500 Power Supplies, see “Power Supply” on page19.
Figure 3 Gigabit Ethernet Port Pin-Out
Port LEDs
Each 10/100/1000 Ethernet port is equipped two LEDs that allow you to monitor the status of and activity on
the port. These LEDs provide basic monitoring of the status, activity, and basic configuration of each port.
The information displayed by these LEDs can be changed via the LCD.
LINK/ACT: on the left side of the port, displays the link status of the port.
Status: on the right side of the port, displays the status of the port. The information displayed by this
LED changes based on LCD’s mode. The LED behavior for each mode is describe in Table 7.
5 Uplink Module Slot The installation slot for the optional Uplink Module
Table 7 10/100/1000 Ethernet Port LEDs
LED Function LCD Mode Indicator Status
LINK/ACT Link status N/A Green (Solid) Link has been established
Green (Blinking) Activity on link
Off No link
Table 6 Front Panel Components
Callout Component Description
1000Base-T Gigabit
Ethernet Port
RJ-45 Female
Pin-Out
Signal Name
1
2
3
4
5
6
7
8
BI_DC+
BI_DC-
BI_DD+
BI_DD-
BI_DA+
BI_DA-
BI_DB+
BI_DB-
Function
Bi-directional pair +C
Bi-directional pair -C
Bi-directional pair +D
Bi-directional pair -D
Bi-directional pair +A
Bi-directional pair -A
Bi-directional pair +B
Bi-directional pair -B

Aruba S3500 Series Wired Access Point | Installation Guide S3500 Mobility Access Switch | 11
Management/Status LED Indicators
In addition to the LEDs on each individual port, there are three additional LEDs on the front panel that
provide overall status of the device. These LEDs provide basic monitoring of the overall status of the S3500.
Status Port status Administrative Green (Solid) Port Enabled
Off Port Administratively
Disabled
Duplex Green (Solid) Full-duplex
Off Half-duplex
PoE Green (Solid) PoE Enabled
Green (Blinking) Power enabled, but power
denied due to availability
Off PoE not enabled
Speed Green (Solid) 1000 Mbps
Off 10/100 Mbps
Table 8 Management/Status LEDs
LED Function Indicator Status
Power Input power status/
system status Green (Solid) Power On
Off Power Off
Status Module status Green (Solid) Operational
Green (Blinking) Device is loading software (on
initial start only)
Amber (Blinking) Major Alarm
Amber (Solid) Critical Alarm
Off No power
Stack Stacking indication Green (Solid) Primary
Green (Blinking) Secondary
Off Linecard (Stack Member)
Table 7 10/100/1000 Ethernet Port LEDs
LED Function LCD Mode Indicator Status

12 | S3500 Mobility Access Switch Aruba S3500 Series Wired Access Point | Installation Guide
LCD Panel
The S3500 is equipped with an LCD panel that displays a variety of information about the mobility access
switch’s status and provides a menu that allows for basic operations such as initial setup and reboot. The
LCD panel displays two lines of text with a maximum of 16 characters on each line. When using the LCD
panel, the active line is indicated by an arrow next to the first letter.
Figure 4 LCD Panel
The LCD panel is operated using the two navigation buttons to the left of the screen.
Menu: Allows you to navigate through the menus of the LCD panel.
Enter: Confirms and executes the action currently displayed on the LCD panel.
The LCD has four modes:
Boot: Displays the boot up status.
LED Mode: Displays the mode that the STATUS LED is in.
Status: Displays the status of different components of the S3500, including Stacking Ports, Power
Supplies, and ArubaOS version.
Maintenance: Allows you to execute some basic operations of the S3500 such as uploading an image or
rebooting the system.
Table 9 LCD Panel Components
Callout Component Description
1 LCD Screen Used to configure LCD behavior and other basic operations
2 Menu Button Used to select the LCD screen menu
3 Enter Button Used to execute actions on the LCD Screen
Table 10 LCD Panel Mode: Boot
Function/Menu Options Displays
Displays boot status “Booting ArubaOS...
POWER MENU
ENTER
STATUS
STACK
1
2
3

Aruba S3500 Series Wired Access Point | Installation Guide S3500 Mobility Access Switch | 13
The LED mode menu allows you to choose what information is communicated by the LEDs on each port.
Refer to Table 7 on page 10 descriptions of the LED behavior of each mode.
Table 11 LCD Panel Mode: LED Mode
Function/Menu Options Displays
Administrative LED MODE: ADM - displays whether or not the port is administratively enabled or
disabled.
Duplex LED MODE: DPX - displays the duplex mode of the port.
PoE LED MODE: POE - displays the PoE status of the port.
Speed LED MODE: SPD - displays the speed of the port.
Exit Idle Mode EXIT IDLE MENU
Table 12 LCD Panel Mode: Status
Function/Menu Options Displays
Stack Displays the device’s role in the stack and slot number.
ArubaOS Version ArubaOS X.X.X.X
PSU Status Displays status of the power supply unit.
PSU 0: [OK | FAILED | MISSING]
PSU 1: [OK | FAILED | MISSING]
Fan Tray Displays fan tray status.
FAN STATUS: [OK | ERROR | MISSING]
FAN TEMP: [OK | HIGH | SHUTDOWN]
Exit Status Menu EXIT STATUS
Table 13 LCD Panel Mode: Maintenance
Function/Menu Options Displays
Upgrade Image Upgrade the software image on the selected partition from a predefined location on
the attached USB flash device.
Standalone: Partition [0 | 1] Upgrade Image [no | yes]
Primary: Partition [0 | 1] Upgrade Image [no | yes]
Non-Primary: N/A
Upload Config Uploads the mobility access switch’s current configuration to a predefined location
on the attached USB flash device.
Standalone: Upload Config [no | yes]
Primary: Upload Config [no | yes]
Non-Primary: N/A

14 | S3500 Mobility Access Switch Aruba S3500 Series Wired Access Point | Installation Guide
Disabling the LCD Screen
By default, the LCD screen is enabled. However, if your S3500 is deployed in a location without physical
security, the LCD screen can be disabled through the CLI. When disabled, pushing one of the navigation
buttons will only illuminate the screen and display the slot, role, device name, and any alarms.
Additionally, it is possible to only disable the maintenance menu. This allows you to change the LED
behavior and view the device status but prevents upgrades and configuration changes.
To disable the LCD screen, enter the Enable mode and use the following CLI commands:
(S3500) #configure terminal
(S3500) (config) #lcd-menu
(S3500) (lcd-menu) #disable menu
To disable only the Maintenance menu or one of its sub-menus, enter the Enable mode and use the
following CLI commands:
(S3500) #configure terminal
(S3500) (config) #lcd
(S3500) (lcd-menu) #disable menu maintenance ?
factory-default
media-eject
quick-setup
system-halt
system-reboot
upgrade-image
upload-config
(S3500) (lcd-menu) #disable menu maintenance upgrade-image ?
parition0
partition1
Factory Default Allows you to return the mobility access switch to the factory default settings.
Standalone: Factory Default [no | yes]
Primary: Factory Default [no | yes]
Non-Primary: N/A
Media Eject Completes the reading or writing of the attached USB device.
All: Media Eject [no | yes]
System Reboot Allows you to reboot the mobility access switch.
Standalone: Reboot [stack | local] [no | yes]
Primary: Reboot [stack | local] [no | yes]
Non-Primary: Reboot local [no | yes]
System Halt Allows you to halt the mobility access switch.
Standalone: Halt [stack | local] [no | yes]
Primary: Halt [stack | local] [no | yes]
Non-Primary: Halt local [no | yes]
GUI Quick Setup Enables the quick setup mode for initial configuration. Pressing enter while this
option is selected will display Quick Setup running.
Exit Maintenance Menu EXIT MAINTENANCE
Table 13 LCD Panel Mode: Maintenance
Function/Menu Options Displays

Aruba S3500 Series Wired Access Point | Installation Guide S3500 Mobility Access Switch | 15
Rear Panel
The rear panel of the Aruba S3500 mobility access switch consists of the following components:
10/100/100BASE-T Management port
RJ-45 Console port
USB 2.0 interface
Temperature LED
One Fan Tray Slot
Two Power Supply Slots
Figure 5 Rear Panel
Figure 6 Rear Ports
Management Port
The S3500 is a equipped with one 10/100/1000BASE-T Gigabit Management (RJ-45) port.
The management port provides 10/100/1000 Mbps Ethernet access to the S3500 CLI, SNMP, and Web
interface for complete system management and troubleshooting. It can also be used to connect to a
separate management network.
SHUTDOWN
CONSOLE MGMT

16 | S3500 Mobility Access Switch Aruba S3500 Series Wired Access Point | Installation Guide
The management port accepts a 4- or 8-conductor Category 5 UTP Ethernet cable with an RJ-45 male
connector. A straight-through cable is required for connection to a network port. A crossover cable is
required for connection to a management workstation. See Figure 7 for more port and cable specifications.
Figure 7 10/100/1000BASE-T Management Port Pin Out
The management port has an LINK/ACT LED on its left side and 1000 LED on its right side. During
operation, the LED provides the following status information:
Console Port
A serial console port is provided for connection to a terminal, allowing for direct local management. The
port’s RJ-45 female connector accepts an RS-232 serial cable with a male connector. The S3500’s accessory
kit includes a RJ-45 to DB-9 adaptor to allow you to connect a management device through its serial port.
Figure 8 Serial Console Port Pin-Out
Table 14 S3500 10/100/1000BASE-T (RJ-45) Management Port
LED Function Indicator Status
LINK/ACT Link Status Information Green (Solid) Link has been established
Green (Blinking) Link activity
Off No link on port
1000 Interface Speed Green (Solid) 1000Mbps
Off 10/100Mbps
1000Base-T Gigabit
Ethernet Port
RJ-45 Female
Pin-Out
Signal Name
1
2
3
4
5
6
7
8
BI_DC+
BI_DC-
BI_DD+
BI_DD-
BI_DA+
BI_DA-
BI_DB+
BI_DB-
Function
Bi-directional pair +C
Bi-directional pair -C
Bi-directional pair +D
Bi-directional pair -D
Bi-directional pair +A
Bi-directional pair -A
Bi-directional pair +B
Bi-directional pair -B
The console port is equipped with two LEDs, however these LEDs do not have a function and will not turn on.
Serial
Console Port
1
2
3
4
5
6
7
8
TxD
GND
RxD
RJ-45 Female
Pin-Out
Direction
Input
Output
GND

Aruba S3500 Series Wired Access Point | Installation Guide S3500 Mobility Access Switch | 17
Communication settings for the serial console port are indicated in Table 15.
Serial Console Port Adaptor
A modular adaptor can be used to convert the RJ-45 (female) connector to a DB9 (male) connector. Refer to
Figure 9 for complete details.
Figure 9 RJ-45 (female) to DB9 (male) Modular Adaptor Conversion
USB Interface
The S3500 is equipped with one USB 2.0 interface (see Figure 6). A USB storage device can be used to save
and upload configurations to the mobility access switch. USB functions are controlled through the LCD
panel on the front of the mobility access switch. For more information on the LCD panel and its functions,
see “LCD Panel” on page12.
Table 15 Console Terminal Settings
Baud Rate Data Bits Parity Stop Bits Flow Control
9600 8 None 1 None
Do not connect an Access Point (AP) to the serial console port. The serial console port is compatible with only RS-
232 devices. Non-RS-232 devices, such as APs, are not supported.
3
4
5
2
5
63
RJ-45 DB-9
Internal
Connections
TxD
GND
RxD
1
2
3
4
5
6
7
8
TxD
GND
RxD
RJ-45 Female
Pin-Out
DB-9 Male
Pin-Out
TxD
RxD
Ground
5
4
3
2
1
9
8
7
6

18 | S3500 Mobility Access Switch Aruba S3500 Series Wired Access Point | Installation Guide
SHUTDOWN LED
The S3500 is equipped with a SHUTDOWN LED (see Figure 6), which serves two functions:
If you execute the system halt command from the CLI or the LCD screen, the SHUTDOWN LED will
become red once the system halt is complete.
If the temperature of the S3500 exceeds the temperature threshold, the SHUTDOWN LED is lit. To check
the temperature of the chassis at anytime, scroll to the Environmental screen under Status menu on
LCD.
If any of the components of the S3500 reach the designated temperature threshold, the SHUTDOWN
LED will turn on and the S3500 will turn off to protect itself from damage. The CPU threshold is 212 ºF
(100 ºC).
Fan Tray
The S3500 is equipped with a field-replaceable, hot-swappable fan tray. Each fan tray features four
individual fans that pull air through the chassis from the front and sides through to the rear. Each fan tray
can tolerate the failure of a single fan while maintaining a safe operating temperature for the mobility
access switch.
Hot Swapping
Hot swapping allows you to replace a failed fan tray, making it unnecessary to shut down the S3500 during
the replacement procedure.
Figure 10 Fan Tray
The S3500 software also sends traps to provide a warning once the system temperature approaches the system
tolerance. Additionally, you can monitor the current system status using the CLI or LCD Screen. For more
information on traps and system monitoring, see the ArubaOS 7.1 User Guide.
Table 16 Fan Tray Components
Callout Component Description
1 Left Latch Used to secure the left side of the fan tray to the chassis.
2 Right Latch Used to secure the right side of the fan tray to the chassis.
3 Handle Used to insert and remove the fan tray from the chassis.
1
2
3

Aruba S3500 Series Wired Access Point | Installation Guide S3500 Mobility Access Switch | 19
Figure 11 shows the airflow pattern for the S3500. The blue arrows show cool air being pulled into the
device and the red arrows show warm air being forced out by the fan tray module. When installing your
S3500, ensure that you leave sufficient space around the device for proper airflow.
Figure 11 Airflow Pattern
Power Supply
The Aruba S3500-series Power Supply adapts electrical power for use with the S3500. The device chassis
has two slots that can hold individual power supplies to support load sharing, redundancy, and fault
tolerance.
The Aruba S3500 is shipped with one hot-swappable, field-replaceable, AC power supply (350W or 600W,
depending on the model) and one blank face plate. The included power supply is installed in the slot PSU 0,
while slot PSU 1 has a blank face plate covering the opening. The mobility access switch can operate with
one or two active power supplies, depending on the demands of your configuration.
350W Power Supply: This power supply has a single voltage rail, at 12V, and does not support PoE.
600W Power Supply: This power supply has two voltage rails, one at 12V and the other at 56V, and is
capable of supporting PoE.
1050W Power Supply: This power supply has two voltage rails, one at 12V and the other at 56V, and is
capable of supporting PoE.
Load Sharing
Load sharing occurs when more than one power supply of the same rating is installed in the S3500 and
turned on. Load sharing divides the total power load of the switch among all available power supplies. Since
the power supplies work together, the effective power capacity of the switch is increased with each
additional power supply.
Redundancy
With power redundancy, the S3500 can continue normal operation even when a power supply fails or is
turned off. When multiple power supplies are installed, if one becomes unavailable (fails, or is turned off or
removed) the remaining power supplies will attempt to provide full power for the device. If the device’s
total power load does not exceed the combined rated output of the remaining, operational power supplies,
Never insert or remove a power supply while the power cord is connected. Verify that cord has been disconnected
from the power supply before installation or removal.

20 | S3500 Mobility Access Switch Aruba S3500 Series Wired Access Point | Installation Guide
the switch will continue to operate. For information on how redundancy and power supply failure affect
PoE, see “PoE” on page21.
Hot Swapping
Hot swapping allows you to replace one failed power supply while the others provide full power. This
makes it unnecessary to shut down the S3500 during the replacement procedure.
Hot swapping is supported only when power redundancy is in effect. This requires that after the target
power supply is removed, the device’s total power load does not exceed the combined rated output of the
remaining power supplies
Modules
The 300W and 600W power supplies are autosensing, load-sharing, redundant power supply modules that
support an input voltage of 100 VAC to 240 VAC. Each power supply has a country-specific power cord for
connection to an AC power outlet.
Figure 12 Power Supply
Table 17 Power Supply Components
Callout Component Description
1 Latch Used to secure the power supply to the chassis.
2 AC OK LED AC status LED.
3 DC OK LED DC status LED.
4 TH OK LED Power supply temperature LED.
5 Retaining Clip Secures the power cord to the power supply.
6 AC Power Cable Socket Attach power cord here.
7 Handle Used to insert and remove the power supply from the chassis.
8 Power Supply Blanking Plate Covers the extra power supply slot. Do not operate your S3500
without this blanking plate or a power supply in either slot.
1
5
7
2
3
4
86