Cisco Systems OL-5965-01 warranty Va voltage = Vb voltage greater than 0.25

Power Connections

Note When source A and source B are wired with common negative terminals, as in Figure 17, discharging does not occur and there is no requirement that source A and source B voltages be equal.

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

	Va voltage = Vb voltage (greater than 0.25 V)
Va voltage = Vb voltage (within 0.25 V)
A-	A-
Va	Va
+	+
A+	A+

B+	B+
+	+
Vb	Vb
B-	B-	127040

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.

Connecting Cables to Cisco 3800 Series Routers

26 OL-5970-02