Cisco 3725 Hardware Installation Guide - Page 60

DC Power Connections

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Power Connections Chapter 3 Installing the Router Warning The illustration shows the DC power supply terminal block. Wire the DC power supply as illustrated. The proper wiring sequence is ground to ground, positive to positive, and negative to negative. The ground wire should always be connected first and disconnected last. Statement 239 Caution Do not overtorque the terminal block contact screws. Recommended torque is 8.0 ± 0.5 in-lb (0.9 ± 0.05 N-m). Figure 3-16 DC Power Connections -DC, input A Return, input A Safety ground Return, input B -DC, input B A+ +B A+ +B Negative DC input Terminal block Positive DC input Step 6 Install the plastic cover over the terminals. (See Figure 3-17.) Return, input A +DC, input A Safety ground +DC, input B Return, input B Terminal block 95967 Warning The safety cover is an integral part of the product. Do not operate the unit without the safety cover 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 Step 7 Organize and secure the wires using cable ties as shown in Figure 3-17. Step 8 Turn on power to the DC circuit. 3-14 Cisco 3700 Series Routers Hardware Installation Guide OL-2180-08

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3-14
Cisco 3700 Series Routers Hardware Installation Guide
OL-2180-08
Chapter 3
Installing the Router
Power Connections
Warning
The illustration shows the DC power supply terminal block. Wire the DC power supply as illustrated.
The proper wiring sequence is ground to ground, positive to positive, and negative to negative. The
ground wire should always be connected first and disconnected last.
Statement 239
Caution
Do not overtorque the terminal block contact screws. Recommended torque is 8.0
±
0.5 in-lb
(0.9
±
0.05 N-m).
Figure 3-16
DC Power Connections
Step 6
Install the plastic cover over the terminals. (See
Figure 3-17
.)
Warning
The safety cover is an integral part of the product. Do not operate the unit without the safety cover
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
Step 7
Organize and secure the wires using cable ties as shown in
Figure 3-17
.
Step 8
Turn on power to the DC circuit.
95967
A
+
B
+
A
+
+
B
Terminal
block
Negative DC input
Positive DC input
Terminal
block
-DC, input B
Return, input B
Safety ground
Return, input A
-DC, input A
Return, input B
+DC, input B
Safety ground
+DC, input A
Return, input A