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Table 19. EXP810 ac power requirements (continued)
a.
Typical voltage: 115 V AC, 60 Hz, assumes 73% power-supply efficiency and 0.99 power
factor
b.
Typical voltage: 230 V AC, 60 Hz, assumes 73% power-supply efficiency and 0.99 power
factor
c.
The higher number in this range applies when all of the drives are placed in Selfseek
mode.
Table 20. EXP810 dc power requirements
Operating Voltage
Nominal Voltage
Idle Current
Maximum Operating Current
Maximum Surge Current
Power and site wiring requirements for models with ac power
supply and fan units
The storage expansion enclosure uses wide-ranging redundant power supplies that
automatically accommodate voltages to the ac power source. The ac power
supplies operate within the ranges specified in Table 19 on page 22. The ac power
supplies meet standard voltage requirements for both domestic (inside USA) and
international (outside USA) operation. They use standard industrial wiring with
line-to-neutral or line-to-line power connections.
The agency ratings for the EXP810 storage expansion enclosure (ac models) are 6
amps at 100 VAC and 2.5 amps at 240 VAC. These are the overall maximum
operating currents for the EXP810 storage expansion enclosure with ac power
supply and fan unit CRUs.
Power recovery after an ac power failure: After a total ac power failure, after
normal power is restored, the storage expansion enclosure performs power-up
recovery procedures automatically without operator intervention.
Power cords and receptacles: The storage expansion enclosure ships with two
jumper cords used to connect to the rack PDU. You must purchase the power cords
that are appropriate for use in a typical outlet in the destination country. See
Appendix D, "Power cords," on page 155 for more information.
Power and site wiring requirements for models with dc power
supply and fan units
The storage expansion enclosure uses wide-ranging redundant power supplies that
automatically accommodate voltages to the dc power source. The dc power
supplies operate within the ranges specified in Table 20. The dc power supplies
require a reliably grounded safety extra low voltage SELV source and an approved
and rated disconnect device for the -48V line.
The agency rating for the EXP810 storage expansion enclosure (dc models) is 16
amps at -42V to -60V dc. This is the overall maximum operating current for the
EXP810 storage expansion enclosure with dc power supply and fan unit CRUs.
Low Range
Requirement
-42 V to -60 V
-48 V
11.8 A
15.8 A
16 A
High Range
Chapter 1. Introduction
23
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