CAUTION: You must ensure that power connections maintain the proper
polarity. The power source cables might be labeled (+) and (–) to indicate
their polarity. There is no standard color coding for DC power cables. The
color coding used by the external DC power source at your site determines
the color coding for the leads on the power cables that attach to the terminal
studs on each PDU.
DC Power Lugs
The accessory box shipped with the packet transport switch includes the cable lugs that
attach to the terminal studs of each input power tray. (The cable lug shown in Figure 88
on page 264 is also used for the grounding the chassis.)
Cable lug; at 15.86-mm (0.625-in.)center line.
Figure 88: DC Power Cable Lug
g006590
Crimp area
All measurements in inches
0.38
2 holes
2.57
0.32 0.380.63
0.76
End view
0.12
Related
Documentation
PTX5000 Power System Description on page 37•
• Connecting DC Power to the PTX5000 Packet Transport Switch on page 94
• Replacing a PTX5000 PDU on page 194
• PTX5000 General Electrical Safety Guidelines on page 239
PTX5000 DC Power Distribution
Most sites distribute DC power through a main conduit that leads to frame-mounted DC
power distribution panels, one of which might be located at the top of the rack that
houses the packet transport switch. A pair of cables (one input and one return) connects
each set of terminal studs to the power distribution panel.
NOTE: All inputs on the DC PDU in slot 0 must be powered by dedicated
power feeds derived from feed A, and all inputs on the DC PDU in slot 1 must
be powered by dedicatedpower feedsderivedfrom feedB. Thisconfiguration
provides the commonly deployed A/B feed redundancy for the system.
Related
Documentation
• PTX5000 Power System Description on page 37
• Connecting DC Power to the PTX5000 Packet Transport Switch on page 94
Copyright © 2012, Juniper Networks, Inc.264
PTX5000 Packet Transport Switch Hardware Guide
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