Cisco Systems Boat Cisco Systems Boat User Manual

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Cisco Catalyst 4900M Switch Installation Guide
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Chapte r 3 Installing the Switch
Connecting DC-Input Power to the Catalyst 4900M Switch
Step 7 Attach the appropriate size lug to the source DC ground wire. The lug must have:
• A single hole able to accommodate the 4 mm g round post.
• The barrel can be either straight or bent as necessary.
The ground lug is not supplied as part of the chassis accessory kit; you need to purchase it separately.
Step 8 Connect the source DC cables to the teminal block in this order (see Fig ure 3-8):
• Position the ground cable lug on the power supply ground terminal post. Slide the lockwasher over
the ground post and tighten the nut to secure the source DC ground wire. Do not overtighten the nut.
(15 in-lbs (1.7 Nm))
• Position the negative (–) source DC cable lug on the power supply negative (–) terminal posts. Slide
the lockwashers over the terminal posts and tighten the nuts to secure the source lug to the posts. Do
not overtighten the nuts. (35 in-lbs (3.6 Nm))
• Position the positive (+) source DC cable lug to the power supply positive (+) terminal posts. Slide
the lockwashers over the terminal posts and tighten the nuts to secure the source lug to the posts. Do
not overtighten the nuts. (35 in-lbs (3.6 Nm))
Note The terminal block on the 1000 W DC-input power supply is labeled positive(+) (top two posts)
and negative (–) (bottom two posts). The ground post is located on the DC-input power supply
faceplate, separate from the terminal block.
Figure 3-8 Attachi ng t he Sou rce DC Cables to t he Power Supply
Step 9 Route the two source DC cables out of the terminal block, position the terminal block cover over the
terminal block, and snap the cover into place. (See Figure 3-9.) Make sure that both the top and the
bottom clips on the terminal block cover have fully engaged the tabs on the terminal block.
1 Source DC positive (+) cable 3 Source DC ground cable
2 Source DC negative (–) cable
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