Site Preparation and Safety Information

Power Considerations

AC and DC power supplies, and an optional redundant (second) power supply, are available for most systems.

Note Refer to your hardware installation guide for AC and DC power specifications and for redundant power supply availability.

Be careful when connecting systems to the supply circuit so that wiring is not overloaded.

AC Power

The system is designed for connection to TN power systems. A TN power system is a power distribution system with one point connected directly to earth (ground). The exposed conductive parts of the installation are connected to that point by protective earth conductors.

Ensure that the plug-socket combination is accessible at all times, because it serves as the main disconnecting device.

DC Power

Connect DC-input power supplies only to a DC power source that complies with the safety extra-low voltage (SELV) requirements in the UL60950-1, CAN/CSA-C22.2 No. 60950-1-03, AS/NZS 60950-1 EN/IEC 60825-1, 21 CFR 1040, EN 60950-1, and IEC 60950-1 standards.

Incorporate a readily accessible two-poled disconnect device in the fixed wiring.

Ensure that power is removed from the DC circuit before installing or removing power supplies. Tape the switch handle of the DC circuit breaker in the off position.

Use only copper conductors to connect to a DC terminal block.

Use approved wiring terminations, such as closed-loop or spade-type with upturned lugs, when stranded wiring is required. These terminations should be the appropriate size for the wires and should clamp both the insulation and the conductor.

Ensure that no exposed portion of the DC-input power source wire extends from the terminal block plug. An exposed wire can conduct a harmful level of electricity.

Redundant Power

If your system includes an optional redundant (second) power supply, connect each of the two power supplies to different input power sources. Failure to do so makes the system susceptible to total power failure in the event that one of the power supplies fails.

Regulatory Compliance and Safety Information for Cisco 7200 Series Routers

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Cisco Systems 7204 VXR, 7206 VXR, 7200 Series, 7202 manual Power Considerations, AC Power

7202, 7204 VXR, 7200 Series, 7206 VXR specifications

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