Brocade Communications Systems Brocade VDX 8770-4 - Manual (Page 34)

14 Brocade VDX 8770-4 Hardware Reference Manual
53-1002563-02
Preparing for the Brocade VDX 8770-4 installation
2
CAUTION
For the DC input circuit to the system of a Brocade VDX 8770-4 (3000W power supply), make
sure there is an 80 Amp circuit breaker, minimum -48 VDC, double pole, on the input lugs to the
power supply. The input wiring for the connection to the switch should be copper wire, 2 American
Wire Gauge (AWG), marked VW-1, and rated minimum 90°C.
The power requirements for a given switch configuration depend on which modules have been
installed in the switch.
Table 4 shows the power consumption for the modules that can be used in
the Brocade VDX 8770-4 switch along with the power consumption for the cooling fans.
All numbers for the line cards assume that the card is fully populated with optical transceivers,
including QSFPs for the 12x40 GbE line cards. All ports are Ethernet.
You can calculate your power requirements by combining the power demands for the various
modules and fan units in your configuration. While you may use fewer ports in a given line card, it is
always safer to use the power requirement of a fully populated card.
CAUTION
For the NEBS-compliant installation of a Brocade VDX 8770-4 with AC or DC systems, use a
ground wire of at least 2 AWG. The ground wire should have an agency-approved crimped
connector (provided with the device) attached to one end, with the other end attached to building
ground. The connector must be crimped with the proper tool, allowing it to be connected to both
ground screws on the enclosure. Before crimping the ground wire into the provided ground lug,
Inrush current Limited to 60 Amp peak for any initial
current surge or spike of 10 ms or less at
either cold or warm start. Any additional
inrush current surges or spikes in the form
of AC cycles or multiple AC cycles greater
than 10 ms and less than 150 ms, must not
exceed 25 Amp peak. Limited to 70 Amp peak for any initial
current surge or spike of 10 ms or less at
either cold or warm start.
Output 12 VDC, 245 Amps 12 VDC, 245 Amps
TABLE 3 Power specifications (Continued)
Specification Value for 3000W AC power supply Value for 3000W DC power supply
TABLE 4 Power demands per component
Module or fan units Power demand at idle -
blades enabled, no
optics, ports disabled
(Watts) Nominal power demand -
blades enabled, optics, 50%
line rate, random packets
(Watts) Maximum power demand - blades
enabled, optics, traffic present, full line
rate, 64 byte smallest packet, 40°C
ambient temp., maximum power for all
supported optics (Watts)
Management module 46 46 50
Switch fabric module 120 120 132
48x1G line card 245 310 460
48x10G line card 245 310 460
12x40G line card 247 290 440
Fan unit 25 25 268