Alcatel 7750 SR-12, Installation Manual

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Installing DC PEMs
Page 72
7750 SR-12
Figure 22: DC-Input Power Terminal Block Wiring with Safety Cover
Follow these steps to wire the DC-input power terminal block:
Step 1 Remove the safety cover from the DC terminal block ( Figure 20 ).
Step 2 Loosen the -VDC and RTN terminal nuts ( Figure 21 ) and remove from the studs.
Step 3 Using the prepared DC power cable(s), connect the RTN positive/return (+) cable to the
(RTN) terminal according to local safety codes.
Step 4
Replace the nuts and tighten with a torque wrench to 56 pound-inches.
Step 5
Connect the VDC (-) cable to the top (-48V) terminal according to local safety codes.
Step 6
Replace the nuts and tighten with a torque wrench to 56 pound-inches.
Step 7
Replace the safety cover and secure into place by tightening the captive screws
(
Figure 22 ).
SR12018