Cisco 2800 Series Manuel de démarrage rapide - Page 25

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When source A and source B are wired with common negative terminals, as in Figure 22, discharging does not occur

Note

and there is no restriction requiring that source A and source B voltages be equal.

Figure 23

Connecting Source A and Source B with Common Positive Terminals

Va voltage = Vb voltage (within 0.25 V)

In Figure 24, 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 24.

Figure 24

Source A and Source B Wired with Opposite-Polarity Grounds

Va voltage = Vb voltage (greater than 0.25 V)

A-

A+

B+

B-

A-

A+

B+

B-

A-

A+

B+

B-