Connecting the FortiGate-5140B chassis to DC power and ground
Power connection and configuration
FortiGate-5140B Chassis Guide
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01-500-156415-20151104
The base FortiGate-5140B 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 530 W. Each chassis slot can supply up to 300 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-5140B chassis with FortiGate,
FortiSwitch, or FortiController boards in five slots would be:
530W + (300W * 5) = 2030W
Example: power for a fully-loaded chassis (14 boards)
The power requirement for a fully loaded FortiGate-5140B chassis with boards in all 14
slots would be:
530W + (300W * 14) = 4730W
Connecting the FortiGate-5140B chassis to DC power and ground
Connect the FortiGate-5140B chassis to DC power using the redundant -48V to - 60 VDC
power entry modules (PEMs) at the bottom of the chassis back panel. The specified
voltage range of the PEMs is -40 VDC to -72 VDC. The chassis ships with both PEMs
installed. The PEMs provide redundant DC power connections for the FortiGate-5140B
chassis and distribute DC power to all chassis slots and components.
Each FortiGate-5140B PEM includes four -48V/-60 VDC (labeled as
-
and connected
together internally) and four return connectors (labeled as
+
and connected together
internally). Each PEM supplies 5 power channels. Each channel includes a separate 30A
fuse to power a group of 3 to 4 chassis slots or a 20A fuse for fans and Shelf Managers.
All terminals should be connected single -48VDC power source with a 100A listed circuit
breaker.
To connect the FortiGate-5140B PEMs to DC power you must use power connectors and
wires that comply with the local electrical wiring code and the requirements of the facility
in which you are installing the FortiGate-5140B chassis.
The PEMs are hot-swappable, which means you can remove and replace a defective
PEM while the system is operating (assuming that the FortiGate-5140B system has both
PEMs connected for redundancy). It is not necessary to notify the software or reset the
system power to remove a PEM. You can add, remove, or replace a second PEM without
interrupting FortiGate-5140B operation.
The PEM includes a Reverse Voltage LED that lights if you have reversed the polarity
when connecting power.
