Alcatel-Lucent 7450 ESS-7, Руководство по установке

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Installing Power Modules
7450 ESS-7 Page 71
Follow these steps to wire the DC-input power terminal block ( Figure 19 ):
Step 1
Remove the safety cover from the DC terminal block.
Step 2
Loosen the -VDC and RTN terminal nuts and one washer from each stud.
Step 3
Using the prepared DC cable(s), connect the RTN positive/return (+) cable to the (RTN)
terminal according to local safety codes.
Step 4 Place the washer and nut on the stud and tighten with a torque wrench to 27 pound-inches.
Step 5 Do not overtighten.Connect the VDC (-) cable to the top (-48V) terminal.
Step 6 Place the washer and nut on the stud and tighten with a torque wrench to 27 pound-inches.
Do not overtighten.
Step 7
Replace the safety cover and secure into place by tightening the captive screws
(
Figure 20 ).
Figure 20: DC-Input Power Terminal Block Wiring with Safety Cover
OFF
O
ON
I
VDC
RTN