•
AC power
—
100 VAC to 240 VAC
The AC power supply has an IEC 320-type power receptacle and a 15-A service connector. You can use
standard straight power cords with the AC power supply. The power supply includes a power cord retainer
clip that can only accept straight power cords. No ON/OFF switch is provided.
Each power supply provides a single primary input power connection. You can install dual-power supplies
for redundancy.
Read the installation instructions before connecting the system to the power source. Statement 1004
Warning
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.
Note
Do not use interface module or power supply ejector handles to lift the chassis; using these handles to lift
the chassis can deform or damage the handles.
Caution
The sections provide more information on the Cisco ASR 920-24SZ-IM, ASR-920-24SZ-M, ASR-920-24TZ-M
Router power supplies:
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 such as the Cisco
ASR 920-24SZ-IM, ASR-920-24SZ-M, ASR-920-24TZ-M Router, which can have substantial
current-draw fluctuations due to bursty data traffic patterns.
Power Connection Guidelines
This section provides guidelines for connecting the Cisco ASR 920-24SZ-IM, ASR-920-24SZ-M,
ASR-920-24TZ-M Router power supplies to the site power source.
This equipment is intended to be grounded to comply with emission and immunity requirements. Ensure
that the switch functional ground lug is connected to earth ground during normal use. Statement 1064
Warning
Cisco ASR-920-24SZ-IM, ASR-920-24SZ-M, ASR-920-24TZ-M Aggregation Services Router Hardware Installation
Guide
77
Installing the Router
Preventing Power Loss
Содержание ASR-920-24SZ-IM
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