Cisco 2851 - Integrated Services Router User Manual page 96

Power Connections
Figure 6
Va voltage = Vb voltage (within 0.25 V)
+
+
In Figure
configuration.
Do not use the DC input configuration shown in
Caution
Figure 7
Cable Connection Procedures for Cisco 2800 Series Routers
8
Connecting Source A and Source B with Common Positive Terminals
A-
Va
A+
B+
Vb
B-
7, source A and source B are wired with opposite polarity grounds. Do not use this
Source A and Source B Wired with Opposite-Polarity Grounds
A- A-
Va Va
+ +
A+ A+
B+ B+
+ +
Vb Vb
B- B-
Va voltage = Vb voltage (greater than 0.25 V)
Va Va
+ +
+ +
Vb Vb
Figure 7.
A- A-
A+ A+
B+ B+
B- B-
OL-5787-02