Cisco Network Device 2800 Introduction Manual page 80

Power Connections
Figure 3 Wire Routing and Attachment for Cisco 2821 and Cisco 2851 Routers
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Plastic covers
Approved Scenarios and Scenarios Not Approved for Dual DC Power Supply Configuration in Cisco
2800 Routers
You can connect a single DC power source to either the A input or the B input. If there are dual power
sources, connect one source to the A input and one source to the B input. Both sources must be the same
polarity (with respect to ground) and voltage (within 0.25 volts). Do not connect –DC grounded and +DC
grounded dual sources to Cisco 2811, Cisco 2821, and Cisco 2851 routers.
Dual sources with opposite-polarity grounding damage equipment.
Caution
Cable Connection Procedures for Cisco 2800 Series Routers
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C O N S O
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2 4 - 6 0 V
- - - 1 2 A
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A
+
+
B
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Cable tie
From DC
power
source
OL-5787-02