IBM TotalStorage SAN256N Director 2045-N16, Руководство по установке и обслуживанию, Страница: 36 / 157

SAN256N Director 2045-N16
16
Figure 11. SAN256N director midplane
Power supply assemblies
Two power supply assemblies are located in the lower rear of the chassis. Each power
supply assembly is a removable, integrated subchassis and is a hot-swappable unit. The
two power supply assemblies provide the SAN256N director with full DC redundancy
(load sharing) for a single chassis system.
Integrated fans are contained within each power supply assembly. The fans draw air
through the entire length of each power supply assembly. The fan assembly air flow is
isolated from the system air flow (chassis fan assemblies).
The electrical specifications of the power supply assembly are:
• Input voltage is 220 VAC nominal; VAC input range is from 200 VAC to 240 VAC.
• Input frequency is 50/60 Hz nominal; frequency range is 47 Hz to 63 Hz.
• Output voltage is 48 VDC nominal, plus/minus 5%
AC input power is supplied to each power supply via a separate line cord (IEC-320-C19
Plug to L6-20P Plug; line cord rated 16A @ 250VAC). Each supply also has its own DC
Power On/Off switch.
SAN256N midplane
(viewed from chassis rear,
chassis rear shell removed)
TMF/TFD module
connectors
TSW switch
module connectors
Power supply
TFIO blade
connectors
(located on front
side of midplane)
TCM control
module connectors
(located on front
side of midplane)
I/O connectors
Side fan assemblies
I/O connectors