98 EMC VNX8000 Hardware Information Guide
Disk-array enclosures
Dual DC output, knob-type power supply
The dual DC output, knob-type power supply (Figure 78) includes two status LEDs: a fault
LED and a power LED. The dual output version is rated at 1080 W with two 12-V DC
outputs (540 W at each) and one AC input per power supply. Table 42 describes the LEDs.
Figure 78 Example of a 3U, 120 (2.5-inch) DAE DC dual output, knob-type power supply module
(rear view)
LCC
Figure 79 shows an example of the rear view of a 3U, 120 (2.5-inch) DAE showing LCC A
and B with single output power supplies.
Figure 79 Example of a 3U, 120 (2.5-inch) DAE showing LCC A and B (rear view)
Each LCC (Figure 80 on page 99) provides 4x mini-SAS small form-factor 8088 (SFF-8088)
specification connectors (Figure 81 on page 100). These ports are connected to a SAS
expander with 36 PHYs. The expander allows for traffic to pass through the enclosure
upstream and downstream. It also provides access to the disk drive SAS sub-system. This
disk drive sub-system is made up of four 36 PHY edge expanders in parallel. Each
Fault LED
Knob
Power LED
Table 42 3U, 120 DAE dual DC output, knob-type power supply (fault and power on) LEDs
LED Color State Description
Fault Amber On Fault, under LCC control. Fans or outputs are
outside the specified operating range while the unit
is in low power mode.
Blinking External fault, under LCC control. 12 VDC off due to
all LCCs not being present.
— Off No fault or power off
Power Green On AC Power on
— Off AC Power off, verify source power
LCC ALCC B
A0B0 B1 A1
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