Removing and Replacing a PSU
184 7750 SR-a4 and SR-a8 Installation Guide
ii. Tighten the screw with a Phillips torque screwdriver. Do not over-tighten. The
recommended torque is 3 lbf-in (0.339 N
.
m).
iii. Replace the safety cover that you removed from the terminal block in Step 6.
Step 10. Check that the DC supply wiring is correct.
Step 11. Restore the external power that was disconnected or turned off at the branch circuit
device. See 7750 SR-a –48 VDC PSU LED and Connectors for more information.
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