Installation guide

Making External Connections to Cisco 4000 Series Routers 4-107
Connecting Routers with a DC-Input Power Supply
Step 3 Wire the DC-input power supply to the terminal block as shown in Figure 4-60.
The proper wiring sequence is ground to ground, positive to positive, and negative
to negative.
Caution Do not overtorque the terminal block captive thumbscrew or terminal block
contact screws. The recommended torque is 8.2 ± 0.4 inch-lb.
Warning The illustration shows the DC power supply terminal block. Wire the DC power
supply using the appropriate lugs at the wiring end, as illustrated. The proper wiring
sequence is ground to ground, positive to positive (line to L), and negative to negative
(neutral to N). Note that the ground wire should always be connected first and disconnected
last. (To see translated versions of this warning, refer to the appendix “Translated Safety
Warnings.”)
Warning After wiring the DC-input power supply, replace the terminal block cover and
screw to ensure user safety. (To see translated versions of this warning, refer to the appendix
“Translated Safety Warnings.”)
Warning After wiring the DC power supply, remove the tape from the circuit breaker
switch handle and reinstate power by moving the handle of the circuit breaker to the ON
position. (To see translated versions of this warning, refer to the appendix “Translated
Safety Warnings.”)
Step 4 Remove the tape from the circuit breaker switch handle and restore power by
moving the circuit breaker handle to the ON position.
Caution To avoid damaging the power supply when returning the chassis to the
manufacturer (for example, if a failure occurs), remove the power supply terminal block
cover so that it will fit in the shipping container.