3-29
Cisco 2900 and 3900 Series Hardware Installation
OL-18712-01
Chapter 3 Installing and Connecting the Router
Connecting Power
In
Figure 3-29
, either the positive source terminal or the negative source terminal is tied to ground.
Figure 3-29
Connecting to One Source Only—Source A or Source B
In
Figure 3-30
, source A and source B share common negative terminal connections.
Figure 3-30
Connecting Source A and Source B with Common Negative Terminals
A-
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A+
B+
B-
+
A-
A+
B+
B-
+
B
a
ttery
So
u
rce
B
a
ttery
So
u
rce
A-
361471
A+
B+
B-
V
a
V
b
+
+
B
a
ttery
So
u
rce