NetSure
™
-48V DC Power System
User Instructions, UM582127000 (Issue AD, January 20, 2014)
Spec. No: 582127000
Code: UM582127000
Model No: 721
NPBB
Issue AD, January 20, 2014
[32]
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.
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
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. Turn the latch
clockwise to secure the door.
13.
Temporarily remove then re-insert the ACU+. Wait for
the ACU+ to initialize.
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.
Warning
Danger
