Cisco WS-C2950-24 Installation Manual page 109

Chapter 3 Installing and Connecting the Router
Figure 3-27
Negative DC input
Figure 3-28
Negative DC input
Install the plastic cover over the terminals. (See
Step 6
The safety cover is an integral part of the product. Do not operate the unit without the safety cover
Warning
installed. Operating the unit without the cover in place will invalidate the safety approvals and pose
a risk of fire and electrical hazards. Statement 117
Organize and bundle the wires using cable ties as shown in
Step 7
If you are installing a second DC power supply, repeat Step 1 through Step 7 for the second supply (input
Step 8
B).
Turn on power to the DC circuit. Be sure to remove tape used to secure the circuit-breaker switch in the
Step 9
OFF position.
OL-18712-01
DC Power Connections for Cisco 3925 and 3925-NOVPN Routers
+
PE
Safety ground
Negative polarity input
0V (return)
DC Power Connections for the Cisco 3945 and 3945-NOVPN Routers
+ PE
Safety ground
Negative polarity input
0V (return)
Positive DC input
+
PE
Safety ground
0V (return)
Positive polarity input
Positive DC input
+ PE
Safety ground
0V (return)
Positive polarity input
Figure 3-29.)
Figure 3-29
Cisco 2900 and 3900 Series Hardware Installation
Connecting Power
or Figure 3-30.
3-27