Sun Microsystems StorageTek StreamLine SL8500, System Assurance Manual

Page: 45 / 278

E24254-01 Chapter 1 Introduction 25
Introduction
■
Accessory Racks
The SL8500 library provides space where up to four standard RETMA
1
19 inch racks can be installed. These racks are oriented so the components
mount vertically instead of horizontally and can hold up to 6Us
2
of equipment,
such as switches, hubs, and servers.
There is a six connector PDU that provides 4 amps of AC power for each rack.

Two cooling fans provide additional air flow for the installed equipment.
Because of the numerous types of equipment, StorageTek cannot mandate
what the customer installs in these racks; therefore, certain guidelines should
be followed to prevent voiding the warranty.
Table 9 lists these guidelines.
• Two of the racks (2 and 4) receive power from the primary AC power grid.
• The other two racks (1 and 3) require the 2N power configuration.
• When you loose power to a PDU, you also loose power to the associated racks:
1. RETMA = Radio Electronics Television Manufacturers Association.
2. U stands for units. One unit is equal to 4.4 cm (1.75 in.).
Table 9. Accessory Rack Installation Guidelines
Guideline Specifics
Equipment weight The accessory rack itself is mounted on slides rated for 80 kg (175 lb).

The recommended safe load is 64 kg (140 lb).
Rack mounting Components must be able to function in a vertical orientation. Heavy
components (such as Fibre Channel switches) must have threaded holes
in the sides to attach rack slides. Light weight components (such as
Ethernet switches) may be mounted with a bracket.
Thermal requirements Maximum power dissipation is 880 watts (3,000 Btu/hr) per rack module.
Air flow Generally from non-port end to port end of component. Side to side air
flow is acceptable. Maximum Volume per 6u rack module is 241 scfm
(standard cubic feet per minute) at 0 inches of water static pressure to a
minimum of 0 scfm at 0.60 inches of water static pressure depending upon
the devices and equipment installed blocking the fan air flow.
Power cord Power plug to connect to the rack PDU is: IEC320 C13 shrouded male
plug. Minimum cord length is component length
plus 46 cm (18 in.) for a
service loop.
Regulatory agency
compliance Minimum requirements are:

Safety – UL or CSA certification and Electromagnetic – Class A
certification from agencies such as the FCC or BSMI.
Dimensional
restrictions Rack module depth is 72 cm (28 in.)

Recommended safe length is 66 cm (26 in.)
Maximum power
consumption Per rack module is 4 Amps (maximum)

Per outlet strip is 200–240 VAC, 50 to 60 Hz