Power Connections
27
Connecting Cables to Cisco 3800 Series Routers
OL-5970-02
Figure 19
Source A and Source B Wired with Opposite-Polarity Grounds
Connecting Routers to Backup Power
The Cisco 3845 router accommodates two hot-swappable power supplies in bays at the front of the
router. A single power supply meets router requirements. The second power supply provides
redundancy, load sharing, and increased router availability. Either power supply can be removed without
affecting router operation. Any combination of two power supplies is permitted.
For instructions for installing a second power supply in a Cisco 3845 router, see the “
Installing and
Upgrading Internal Components in Cisco 3800 Series Routers
” section.
The Cisco 3825 router has one internal power supply and provides a connector to an optional
Cisco Redundant Power System (RPS) external backup source.
Figure 20
and
Figure 21
illustrate this
connection. Use a flat-blade screwdriver to pry off the door over the RPS connector before connecting
the cable. See the
Cisco RPS-675 Hardware Installation Guide
for complete RPS power connection
instructions.
Caution
Before connecting the RPS to the router, make sure that either the RPS is in standby mode or the RPS
AC power is disconnected. Connecting the RPS to AC power automatically places the RPS in
active mode.
A-
127041
A+
B+
B-
Va
Vb
+
+
A-
A+
B+
B-
Va
Vb
+
+
Содержание 3800 Series
Страница 7: ...Safety Warnings 7 Introduction to Hardware Documentation OL 5965 01 ...
Страница 8: ...Safety Warnings 8 Introduction to Hardware Documentation OL 5965 01 ...
Страница 30: ...Regulatory Compliance 16 Overview of Cisco 3800 Series Routers OL 5966 01 ...
Страница 48: ...Grounding the Router 18 Installing Cisco 3800 Series Routers in an Equipment Rack OL 5969 01 ...
Страница 80: ...More Troubleshooting Help 50 Troubleshooting Cisco 3800 Series Routers OL 5972 01 ...
Страница 102: ...Removing SFP Modules 72 Installing SFP Modules in Cisco 3800 Series Routers OL 5968 01 ...