Installing the Power Supply
The Cisco NCS 4216 router provides the choice of the following power supply:
• 900 W DC power: - 40VDC to -72VDC
The DC power supply provides option to connect with two different sources (dual feed); positive (+) and
negative (-) are marked on the PSU terminals.
The power supply must be wired before plugging the power supply in the chassis. Ensure the branch circuit
breaker is turned off. Only after installing the power supply in the chassis, should the branch circuit breaker
be turned on. The branch circuit breaker must be turned off before unplugging the power supply.
Caution
Each power supply provides a dual primary input power connection.
Read the installation instructions before connecting the system to the power source. Statement 10
Warning
Do not use interface module and power supply ejector handles to lift the chassis; using the handles to lift the
chassis can deform or damage the handles.
Caution
Preventing Power Loss
Use the following guidelines to prevent power loss to the router.
• To prevent loss of input power, ensure that the total maximum load on each circuit supplying the power
supplies is within the current ratings of the wiring and breakers.
• In some systems, you can use an UPS to protect against power failures at your site. Avoid UPS types
that use ferroresonant technology. These UPS types can become unstable with systems like the Cisco
NCS 4216, which can have substantial current draw fluctuations due to bursty data traffic patterns.
Use the information in the
DC Power Supply Specifications
table to estimate the power requirements and heat
dissipation of a Cisco NCS 4216 based on a given configuration of the router. Determining power requirements
is useful for planning the power distribution system needed to support the router.
Power Connection Guidelines
This section provides guidelines for connecting the Cisco NCS 4216 power supplies to the site power source.
Never defeat the ground conductor or operate the equipment in the absence of a suitably installed ground
conductor. Contact the appropriate electrical inspection authority or an electrician if you are uncertain that
suitable grounding is available. Statement 213
Warning
Installing the Cisco NCS 4216
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Installing the Cisco NCS 4216
Installing the Power Supply
