Palo Alto Networks
Maintaining the Hardware •
45
Cautions and Warnings
Important notes on connecting DC power:
•
If a DC connection is used, all of the following conditions must be met:
– This equipment must be connected directly to the DC supply system earthing electrode
conductor or to a bonding jumper from an earthing terminal bar or bus to which the DC supply
system earthing electrode conductor is connected.
– This equipment must be located in the same immediate area (such as adjacent cabinets) as any
other equipment that has a connection between the earthed conductor of the same DC supply
circuit and the earthing conductor, and also the point of earthing of the DC system.
– The DC system must not be earthed elsewhere.
– The DC supply source must be located within the same premises as this equipment.
– The battery returns of the PA-7050 firewall must be connected as either DC-C or DC-I.
Switching or disconnecting devices must not be in the earthed circuit conductor between the DC source
and the point of connection of the earthing electrode conductor.
CAUTION: All devices that use DC power are intended for installation in
restricted access areas only. A restricted access area is where access can be gained
only by craft (service) personnel through the use of a special tool, lock and key, or
other means of security, and is controlled by the authority responsible for the
location.
CAUTION: For the DC input circuit, make sure there is a 60 amp circuit
breaker, minimum 48VDC, and double pole on the input to the DC power. The
power cables used to connect DC power is provided with the PA-7050 firewall.
CAUTION: For a DC system ground, use a grounding wire of at least 6
American Wire Gauge (AWG). The 6 AWG wire must be attached to the provided
copper grounding lug and crimped with the proper crimping tool. Attach the lug to
the grounding lug bolts on the chassis using the provided star washers and nuts and
attach the other end to the building ground. Torque the lug nut to 50 in.-lbs. Do not
over tighten.
CAUTION: This equipment is designed to permit the connection of the earthed
conductor of the DC supply circuit to the earthing conductor at the equipment. See
installation instructions.
French Translation:
CAUTION:
ATTENTION : Cet équipement est conçu pour permettre de
connecter le conducteur de terre du circuit d'alimentation CC au conducteur de terre
de l'équipement. Reportez-vous aux instructions d'installation.
CAUTION: The PA-7050 firewall configured with DC power supplies is capable
of operating from -40 to 60 VDC at a maximum current level of 60 amps.
