Juniper Networks M5 - Manual (Page 62)

Power Guidelines, Requirements, and Specifications
In addition, in minute amounts of moisture, monoammonium phosphate can become
highly corrosive and corrodes most metals.
Any equipment in a room in which a chemical fire extinguisher has been discharged
is subject to premature failure and unreliable operation. The equipment is considered to
be irreparably damaged.
To keep warranties effective, do not use a dry chemical fire extinguisher
to control a fire at or near a Juniper Networks router. If a dry chemical
fire extinguisher is used, the unit is no longer eligible for coverage under
a service agreement.
We recommend that you dispose of any irreparably damaged equipment in an
environmentally responsible manner.
Power Guidelines, Requirements, and Specifications
The router uses either AC or DC power. There are two load-sharing, isolated power supplies
located at the bottom rear of the chassis, as shown in Figure 3. The power supplies
connect to the midplane, which distributes power to router components according to their
individual voltage requirements. When the power supplies are installed and operational, they
automatically share the electrical load. If a power supply stops functioning for any reason,
the remaining power supplies instantly begin providing all the power the router needs for
normal functioning and can provide full power indefinitely.
Mixing AC and DC power supplies is not supported. The two power supplies
must be either both AC or both DC.
For site wiring and power system guidelines, requirements, and specifications, see the
following sections:
•
Site Electrical Wiring Guidelines on page 43
•
Router Power Requirements on page 43
•
AC Grounding and Power Cord Specifications on page 45
•
DC Grounding, Connection, and Cable Specifications on page 46
42 M5 and M10 Internet Routers Hardware Guide