CAUTION: Ensure that each power cable lug seats flush against the surface of the
terminal block as you tighten the screws. Ensure that each screw is properly
threaded into the terminal block. Before tightening each screw that you insert into
the terminal block, ensure that you are able to spin the screw freely with your
fingers. Applying installation torque to the screw when improperly threaded might
damage the terminal block.
The maximum torque rating of the terminal block on the DC power supply is 6 lb-in.
(0.7 Nm). Excessive torque can damage the terminal block. Use only a
Phillips (+) number 2 screwdriver to tighten screws on the DC power supply
terminal block.
7.
Secure each power cable lug to the terminal block by using the screws and a Phillips (+) number 2
screwdriver. Do not overtighten the screws. Apply between 5 lb-in. (0.6 Nm) and 6 lb-in. (0.7 Nm)
of torque to each screw (see
).
When connecting DC power, the proper wiring sequence is ground to ground, then +RTN to +RTN,
and finally –48 V to –48 V.
Figure 42: Connect Power to a DC-Powered Switch
a. Secure the positive (+) DC source power cable lug to the return terminal (labeled V+).
b. Secure the negative (–) DC source power cable lug to the –48V terminal (labeled V–).
8.
Replace the clear plastic cover over the terminal block.
9.
Verify that the power cables are connected correctly, that they do not touch or block access to
switch components, and that they do not drape where people could trip on them.
10. Connect the console port on the switch (labeled CON) to the external management device.
11. Turn on power to the external management device.
12. If the DC power source outlet has a power switch, set it to the on position.
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