Chapter 4: Cabling the Modular Switch
Power Supply Specifications
Quick Start Guide: 7500N Series Modular Switches
33
4.6
Power Supply Specifications
shows the power supply specifications for each of the PSUs supported.
4.7
Power Supply Configurations
shows the power supply configurations for the modular switches.
4.7.1
Recommendations for power supply usage
•
Use separate circuit with required protection for each power supply.
•
Use the same PSU model when replacing a failed PSU. Check for a suitable alternative if the
model is no longer supported or available.
•
Unless your switch allows for mixing power supplies, do not mix power supply types.
•
You must populate each power domain with the minimum number of PSUs required. Domains
are separate banks of grouped supplies, Ten high and ten low for the 16 slot chassis (Domain
1: PS1 – PS10; domain 2: PS11 – PS20).
•
Chassis with multiple power domains should have an equal number of supplies in each
domain.
•
For supervisor cooling purposes, all systems require the minimum number of PSUs, as
specified in
, in the top section behind the supervisors.
•
For 8- & 12-slot chassis, (grouped power supplies top and bottom) Arista recommends equal
number of power supplies in the top and bottom groups.
•
For the 16-slot chassis with 2 power domains, the power domain with the lowest number of
power supplies prescribes the total power available, therefore, Arista recommends equal
number of PSUs in each domain.
•
Valid redundancy configurations for each domain are described in
section.
Table 4-1 Power supply specifications (each PSU)
Power Supply
Maximum output
power rating (DC)
Input voltage and frequency
Maximum input
current
Input branch
circuit protection
PWR-2700-DC-R
2600 W
-48 or -60 V (nominal)
80 A
100 A
PWR-3K-DC-RED
3000 W
-48 or -60 V (nominal)
80 A
100 A
PWR-3KT-AC RED
3000 W
200 to 240 V (nominal)
50 - 60 Hz (nominal)
16 A
20 A
Table 4-2 Power supply configurations
Modular switch
Recommended
number of PSUs
(for redundancy)
Number of PSUs
shipped in
bundle
Minimum number of
PSUs required (per
power domain)
Maximum number
of PSUs supported
Number of power
domains
DCS-7504N
4
4
2
4
1
DCS-7508N
6
6
2
8
1
DCS-7512N
8
8
2
12
1
DCS-7516N
12
12
3
20
2
