M7I Router Dc Power Supply Specifications; Site Electrical Wiring Guidelines For M Series, Mx Series, And T Series Routers; Table 23: Electrical Specifications For Dc Power Supply - Juniper M7I Hardware Manual

M7i Multiservice Edge Router Hardware Guide

M7i Router DC Power Supply Specifications

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Documentation

Site Electrical Wiring Guidelines for M Series, MX Series, and T Series Routers

170
General Electrical Safety Guidelines and Electrical Codes for M Series, MX Series, and
T Series Routers on page 148
Table 23 on page 170 lists electrical specifications for the DC power supply.

Table 23: Electrical Specifications for DC Power Supply

Description
Maximum power output
DC input voltage
Input DC current rating
Output voltages
NOTE: The DC power supplies are marked –48 VDC. This is the nominal
voltage associated with the battery circuit. Any higher voltages are associated
only with float voltages for the charging function.
M7i DC Power Supply on page 23
Replacing a DC Power Supply on page 111
Replacing an M7i DC Power Cable on page 115
M7i Router Power Requirements on page 163
M7i Chassis Grounding, Connection, and Cable Specifications on page 167
M7i Power Supply LEDs on page 24
Distance limitations for signaling—Improperly installed wires can emit radio interference.
In addition, the potential for damage from lightning strikes increases if wires exceed
recommended distances or if wires pass between buildings. The electromagnetic pulse
(EMP) caused by lightning can damage unshielded conductors and destroy electronic
devices. If your site has previously experienced such problems, you might want to
consult experts in electrical surge suppression and shielding.
Radio frequency interference—You can reduce or eliminate the emission of radio
frequency interference (RFI) from your site wiring by using twisted-pair cable with a
good distribution of grounding conductors. If you must exceed the recommended
Specification
293 W
Nominal: –48, –60 VDC
Operating range: –40.5 to –72 VDC
10 A @ –48 V
+3.3 V @ 40 A, +2.5 V @ 20 A, +5.0 V @ 15 A, +12 V@ 3 A
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