Power Connection And Configuration; Fortigate-5144C Chassis Power Level Requirements - Fortinet FortiGate-5144C Manual

Power connection and configuration

Power connection and configuration
The FortiGate-5144C chassis is designed to be installed in a Telecom data center or similar location that has available -
48VDC power fed from a listed circuit breaker (also called battery power or main DC power). Fortinet expects that most
FortiGate-5144C customers will be installing their chassis in a location that is already equipped with a -48VDC power
system fed from a listed circuit breaker that provides power to existing networking or Telecom equipment. The
FortiGate-5144C chassis is designed to be connected directly to this DC power system.
The FortiGate-5144C is rated at 48VDC 156A with 4x feeds up to 39A/feed. For each feed, the provision can be with
one main breaker rated for 156A or more or four breakers rated at 40A. With a 20% margin, the main breaker should be
rated for 187A. The four breakers for each feed should be rated for at least 46.8A. For full redundancy, a second set of
identical breakers are needed for the second feed.
If DC power is not available you can use the FortiGate-5053B power converter shelf to convert AC to DC to supply DC
power to the FortiGate-5144C chassis.
Fortinet supplies eight 4-ft. power cables with 8 AWG stranded wires and double-hole lugs: Black for -48VDC and red for
RTN. These cables should only be used to connect the FortiGate-5144C PEMs to a FortiGate-5053B power convertor
shelf if purchased with your FortiGate-5144C chassis. The double-hole lugs to be connected to the FortiGate-5144C
PEMs should be covered with the supplied clear PEM terminal protection covers before energizing the power system. If
the power cable length needs to be significantly longer than 4 ft., higher gauge wires should be considered.
If you are connecting your chassis to a local DC power source, use cables that meet your local wiring codes. To connect
the wires to the FortiGate-5144C PEMs use 5/8-inch double-hole lugs with suitable for the DC cables used, such as
Thomas & Betts PN 54850BE.
Green 8 AWG wires are recommended for ground connections (not supplied with the chassis).

FortiGate-5144C chassis power level requirements

This section provides some basic guidelines for determining the power requirements of your FortiGate-5144C chassis.
Actual requirements may vary depending on your installation requirements. Contact Fortinet Support if you need more
information.
The base FortiGate-5144C chassis (empty, with four fan trays, one shelf manager, and four PEMs installed and
operating with the fans running at full speed) requires a maximum of 1000 W. Each chassis slot can supply up to 400 W.
You can use these numbers to estimate the power requirement for a chassis configuration.
Example: power for a chassis with 5 boards
For example, the power requirement for a FortiGate-5144C chassis with FortiGate-5000 series boards in five slots
would be:
1000W + (400W * 5) = 3000W
FortiGate-5144C 6.2.3 Chassis Guide
The current rating is reduced to 138A if no RTM slots are used.
Fortinet Technologies Inc.
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