Cisco 3800 Series Especificações descarregar pdf (Página 23)

Figure 18 Connecting Source A and Source B with Common Positive Terminals

In Figure 19, source A and source B are wired with opposite polarity grounds. Do not use this configuration.

Caution Do not use the DC input configuration shown in Figure 19.

Figure 19 Source A and Source B Wired with Opposite-Polarity Grounds

Connecting the Router to Backup Power

The Cisco 3845 router operates in redundant mode when two power supplies are installed. The Cisco 3825 router has one

internal power supply and a connector for mating to an external backup power source.

To connect the Cisco 3825 router to the external Cisco Redundant Power System (RPS), remove the RPS connector cover from

the bezel and connect the RPS cable. (See Figure 20 and Figure 21.)

See the Cisco RPS-675 Hardware Installation Guide for more information about RPS power connections. To locate this

documents, see the “Where to Go Next” section on page 34.

A-

A+

B+

B-

127040

A-

A+

B+

B-

A-

Va voltage = Vb voltage (within 0.25 V)

Va voltage = Vb voltage (greater than 0.25 V)

A+

B+

B-

A-

127041

A+

B+

B-

A-

A+

B+

B-

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Cisco 3800 Series Especificações Página 23