M120 Ac Power, Connection, And Power Cord Specifications - Juniper Networks Hardware Manual

M120 AC Power, Connection, and Power Cord Specifications

Copyright © 2010, Juniper Networks, Inc.
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Appendix D: Power Guidelines, Requirements, and Specifications for the M120 Router
Replacing an M120 AC Power Supply on page 173
In the AC power configuration, the router can have up to two load-sharing AC power
supplies (see Figure 14 on page 30), located at the rear of the chassis in slots
(left to right). Each AC power supply provides power to all components in the router.
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When two power supplies are present, they share power almost equally within a fully
populated system. The AC power supplies are fully redundant. If one power supply fails
or is removed, the remaining power supply instantly assumes the entire electrical load
without interruption. One power supply provides the maximum configuration with full
power.
Each AC power supply has two AC appliance inlets. Each requires a dedicated AC power
feed. For 100-120 VAC, both inlets are used. For 200-240 VAC, only the top inlet is used.
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 C19W (right angle) appliance coupler at the female end of the cord inserts
into the appliance inlet coupler, type C13, 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.
WARNING:
Translation from Japanese: The attached power cable is only for this product.
Do not use the cable for another product.
NOTE: In North America, AC power cords must not exceed 4.5 m
(approximately 14.75 ft) in length, to comply with National Electrical Code
(NEC) Sections 400-8 (NFPA 75, 5-2.2) and 210-52, and Canadian Electrical
Code (CEC) Section 4-010(3). The cords supplied with the router are in
compliance.
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