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Preventing Power Loss
• 1200 W DC power (N560-PWR1200-D-E and A900-PWR1200-D): - 40.8VDC to -72VDC
• AC power (A900-PWR1200-A): 85VAC to 264VAC
Caution
Unseat the power supply partially so that there is enough space to open the terminal block cover. 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.
Each power supply provides a single primary input power connection. The router supports (2+1) redundancy.
Warning
Read the installation instructions before connecting the system to the power source. Statement 10
Note
Products that have an AC power connection are required to have an external surge protective device (SPD)
provided as part of the building installation to comply with the Telcordia GR-1089 NEBS standard for
electromagnetic compatibility and safety.
Caution
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.
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
• In some systems, you can use an UPS to protect against power failures at your site. Avoid UPS types
Cisco NCS 560-4 Router Hardware Installation Guide
66
The A900-PWR1200-D DC power supply uses 3 position terminal block-style connector with positive
latching/securing and labeled connections for RTN and 48V.
The N560-PWR1200-D-E DC power supply uses 2 position terminal block-style connector with positive
latching/securing and labeled connections for RTN and 48V.
The terminal block connector is of suitable size to carry the appropriate AWG wire size (6AWG to 14
AWG) to handle the input current of the power supply. No ON/OFF switch is provided.
The AC power supply has an IEC-320-C21-type power receptacle and a 20 A service connector. You
can use standard right-angle power cords with the AC power supply. The power supply includes a power
cord retainer. No ON/OFF switch is provided.
supplies is within the current ratings of the wiring and breakers.
that use ferroresonant technology. These UPS types can become unstable with systems like the Cisco
NCS 560-4 Router, which can have substantial current draw fluctuations due to bursty data traffic patterns.
Installing the Cisco NCS 560-4 Router
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