Cisco 2900 Series Installation Manual page 111

Chapter 3 Installing and Connecting the Router
In Figure
Figure 3-29
Battery
Source
+
In Figure
Figure 3-30
+
+
3-29, either the positive source terminal or the negative source terminal is tied to ground.
Connecting to One Source Only—Source A or Source B
A-
A+
B+
B-
3-30, source A and source B share common negative terminal connections.
Connecting Source A and Source B with Common Negative Terminals
Battery
Source
Va
Vb
Battery
Source
+
A-
A+
B+
B-
Cisco 2900 and 3900 Series Hardware Installation
Connecting Power
A-
A+
B+
B-
3-29