M160 Internet Router Hardware Guide
Fire Suppression Equipment
TypeC fireextinguishers, which use noncorrosive fire retardantssuch as carbon
dioxide (CO2) and Halotron™, are most effective for suppressing electrical fires.
Type C fire extinguishers displace the oxygen from the point of combustion to
eliminate the fire. For extinguishing fire on or around equipme nt that drawsa ir from
the environment forcooling, you should use this type of inert oxygen displacement
extinguisher instead of an extinguisherthat leave residues on equipment.
Do not use multipurpose Type ABC chemical fire extinguishers (dry chemical
fire extinguishers) near Juniper Networks equipment. The primary ingredient in
these fire extinguishers is monoammonium phosphate, which is very sticky and
difficult to clean. In addition, in minute amounts of moisture,monoammonium
phosphate can become highly corrosiveand corrodes most metals.
Any equipment in a room in whicha chemical fire extinguisher has been
discharged is subject to premature failure and unreliable op eration. The
equipment is considered to be irreparablydamaged.
NOTE: To keep warranties effective, do not use a dry chemical fire extinguisher to
control a fireat or near a Juniper Networks router. If a dry chemical fire extinguisher
is used, the unit is no longer eligiblefor 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 DC power. There are two load-sharing, pass-throughpower supplies
located at the bottom rear of the chassis, as shown in Figure 2. The power supplie s
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 automaticallyshare the electrical load. If a powersupply
stops functioning for any reason, the remaining p owers upplies instantly begin
providing all the power the router needs for normal functioning and can provide
full power indefinitely.
For site wiring and power system guidelines, requirements, and specifications, see
the following sections:
Site Electrical Wiring Guidelineson page 65
Router PowerRequirements on page 65
Chassis Grounding on page 67
Power, Connection, and Cable Specifications on page 67
64 Power Guidelines, Requirements, and Specifications