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Power connection and configuration
Power requirement guidelines
This section provides some basic guidelines for determining the power requirements of your FortiGate-5144C chassis.
Using these power requirements you can decide how many power supplies and power supply shelves you need. 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 fans, one shelf manager, two shelf alarm modules and two 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
If you are using high-line AC power, one PSU-5000B produces 2725W. Powering a chassis with 5 boards would require
one FortiGate-5053B power supply shelf connected to power feed A (PEM 1 and PEM 2). The power supply shelf would
include two PSU-5000B units and produce a total of 5450W. You can add one more power supply for redundancy. If you
want completely redundant power for the chassis you can connect a second FortiGate-5053B unit to power feed B (PEM
3 and PEM 4) and include two or three power supplies.
If you are using low-line AC power, one PSU-5000B produces 1200W. Powering a chassis with 5 boards would require
one FortiGate-5053B power supply shelf connected to power feed A (PEM 1 and PEM 2). The power supply shelf would
include three PSU-5000B units and produce a total of 8175W. You can add a fourth power supply for redundancy. If you
want completely redundant power for the chassis you can connect a second FortiGate-5053B unit to power feed B (PEM
3 and PEM 4) and include three or four power supplies.
Example: power for a fully-loaded chassis (14 boards)
The power requirement for a fully loaded FortiGate-5144C chassis with boards in all 14 slots would be:
1000W + (400W * 14) = 6600W
If you are using high-line AC power, one PSU-5000B produces 2725W. Powering a chassis with 14 boards would require
one FortiGate-5053B power supply shelf connected to power feed A (PEM 1 and PEM 2). The power supply shelf would
include three PSU-5000B units and produce a total of 8175W. You can add a fourth power supply for redundancy. If you
want completely redundant power for the chassis you can connect a second FortiGate-5053B unit to power feed B (PEM
3 and PEM 4) and include three or four power supplies.
A FortiGate-5053B with four low-line AC power PSU-5000Bs would produce a total of 4800W which is not enough power
for a fully-loaded chassis. As described above you would require at least two low-line power supply shelves and 8 power
supplies.
Connecting a FortiGate-5144C chassis to the FortiGate-5053B power supply shelf
To use a FortiGate-5053B power supply shelf with the FortiGate-5144C chassis you need to make DC power
connections between the primary FortiGate-5144C PEMs and the FortiGate-5053B power supply shelf. You also need
to the connect the FortiGate-5144C chassis and the FortiGate-5053B power supply shelf to ground.
FortiGate-5144C 6.2.3 Chassis Guide
Fortinet Technologies Inc.
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