•
Power consumption for maximum configuration:
Base 1 CFEB with ASM + 1 RE + 4 PICs =
0.6 A + 1.9 A + 0.7 A + 4(0.625 A) =
0.6 A + 1.9 A + 0.7 A + 2.5 A = 5.7 A @ 48 V = 274 W DC
•
Input current from a DC source other than –48 VDC (based on maximum configuration):
(–54 VDC input) x (input current X) = (–48 VDC) x (input current Y)
54 x X = 48 x 48.2
X = 48 x 48.2/54 = 42.8 A
•
System thermal output for maximally configured AC-powered router:
Watts DC/85% AC PEM efficiency/0.293 = BTU/hr
274/0.85/0.293 = 1100 BTU/hr
•
System thermal output for maximally configured DC-powered router:
Watts DC/0.293 = BTU/hr
274/0.293 = 935 BTU/hr
NOTE:
We recommend that you provision at least 13.5 A @ 48 VDC and
use a facility circuit breaker rated for 15 A minimum. Doing so enables you
to operate the router in any configuration without upgrading the power
infrastructure, and allows the router to function at full capacity using
multiple power supplies.
Related
Documentation
M7i Router AC Power Supply Specifications on page 166
•
•
M7i Router DC Power Supply Specifications on page 170
•
Site Electrical Wiring Guidelines for M Series, MX Series, and T Series Routers on page 170
M7i Router AC Power Specifications and Requirements
•
M7i Router AC Power, Connection, and Power Cord Specifications on page 164
•
M7i Router AC Power Supply Specifications on page 166
M7i Router AC Power, Connection, and Power Cord Specifications
Detachable AC power cords, each 2.5 m (approximately 8 ft) long, are supplied with the
router. The C13 appliance coupler at the female end of the cord inserts into the AC
appliance inlet coupler, type C14 as described by International Electrotechnical
Commission (IEC) standard 60320. The plug at the male end of the power cord fits into
the power source receptacle that is standard for your geographical location.
WARNING:
The AC power cord for the router is intended for use with the
router only and not for any other use.
Copyright © 2010, Juniper Networks, Inc.
164
M7i Multiservice Edge Router Hardware Guide
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