Ac Power Circuit Breaker Specifications; Ac Power Cord Specifications - Juniper MX240 Hardware Manual

MX240 Ethernet Services Router Hardware Guide

AC Power Circuit Breaker Specifications

We recommend that you use a dedicated facility circuit breaker rated for
15 A (250 VAC) minimum for each AC power feed, or as permitted by local code.
Doing so enables you to operate the router in any configuration without upgrading
the power infrastructure.

AC Power Cord Specifications

Each AC power supply has a single AC appliance inlet located on the power supply
that requires a dedicated AC power feed. Most sites distribute power through a main
conduit that leads to frame-mounted power distribution panels, one of which can be
located at the top of the rack that houses the router. An AC power cord connects
each power supply to the power distribution panel.
Detachable AC power cords, each 2.5 m (approximately 8 ft) long, are supplied with
the router. The C19 appliance coupler at the female end of the cord inserts into the
AC appliance inlet coupler, type C20 (right angle) 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.
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AC Power Specifications and Requirements
Base router (with fan tray at normal speed and two power supplies) + 1 SCB +
1 Routing Engine + 1 DPC =
270 W + 176 W + 106 W + 367 W = 919 W
Maximum AC-powered low-line configuration @ 110 V with one host subsystem
and a third DPC in the multifunction slot (includes 85% efficiency):
Base router with four power supplies + fan tray at full speed + 1 SCB + 1 Routing
Engine + 3 DPCs
520 W + 24 W + 176 W + 106 W + 3 (429 W) =
520 W + 24 W + 176 W + 106 W + 1287 W = 2113 W
Minimum AC-powered high-line configuration @ 220 V (includes 85% efficiency):
Base router with one power supply + fan tray at normal speed + 1 SCB + 1 Routing
Engine + 1 DPC =
195 W + 176 W + 106 W + 367 W= 844 W
Maximum AC-powered high-line configuration @ 220 V with one host subsystem
and a third DPC in the multifunction slot (includes 85% efficiency):
Base router with two power supplies + fan tray at full speed + 1 SCB + 1 Routing
Engine + 3 DPCs =
350 W + 24 W + 176 W + 106 W + 3 (429 W)=
350 W + 24 W + 176 W + 106 W + 1287 W= 1943 W
System thermal output (based on maximally configured AC-powered router @
110 V):
Watts AC PEM * 3.41 = BTU/hr
2113 W) * 3.41 = 7205 BTU/hr