Alcatel-Lucent 7450 ESS-7 - Page 71

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
V
D
C
RTN