Vertiv™ NetSure™ 7100 Series -48 VDC Power System User Manual
SM-DU Circuit Card Replacement (Supplemental Bays Only)
Procedure
1. Performing this procedure may activate external alarms. Do one of the following. If possible, disable these alarms. If these
alarms cannot be easily disabled, notify the appropriate personnel to disregard any future alarms associated with this system
while the procedure is being performed.
DANGER! Performing the next steps exposes service personnel to battery potential. Exercise extreme caution not to
inadvertently contact or have any tool inadvertently contact any energized electrical termination.
2. Open the distribution cabinet’s front door by turning the latch in the counterclockwise position (system’s in a relay rack), or
open the system’s enclosure door.
WARNING! Damage to the circuit card may result if the next step is not followed.
3. Connect an approved grounding strap to your wrist. Attach the other end to a suitable ground.
4. Remove the top and front panels to access the circuit cards at the bottom of the distribution cabinet. See Figure 5.15.
5. Remove connectors J1, J2, and J3 from the circuit card.
6. Remove the screws securing the circuit card and remove the circuit card from the distribution cabinet.
7. In this step, ensure you do not intermix the old and replacement circuit cards. Set the switches on the replacement circuit
card to the same setting as the old circuit card. Switch settings are documented in the “Setting Jumpers and Switch Options”
section of the Power System Installation Instructions (IM582127000).
8. Slide the replacement circuit card into the mounting position inside the distribution cabinet, and secure with the screws
removed from the old circuit card.
9. Plug connectors J1, J2, and J3 into the circuit card.
10. Reinstall the top and front panels that cover the circuit cards at the bottom of the distribution cabinet.
11. Remove the grounding wrist strap.
12. Close the distribution cabinet’s front door and turn the latch clockwise to secure the door (system’s in a relay rack), or close
the system’s enclosure door.
13. Reboot the Controller
Local Menu Navigation: At the Main Screen, press ENT and ESC at the same time to reset the NCU Controller.
Web Menu Navigation: Go to Advance Settings Menu / SW Maintenance Tab / Reboot Controller button.
14. Enable the external alarms, or notify appropriate personnel that this procedure is finished.
15. Ensure that there are no local or remote alarms active on the system.
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