Vertiv | NetSure™ 8200 Series -48 VDC Power System User Manual (UM582140000) | Rev. A
Replacing the NCU Controller
Refer to the NCU controller instructions (UM1M830BNA) for a replacement procedure.
Circuit Card Replacement Procedures
General
The following circuit card replacement procedures can be performed with the system operating.
Handling Equipment Containing Static Sensitive Components
ALERT! Circuit cards used in this power system contain static-sensitive devices. Read and follow the
instructions contained in “Static Warning” on page 9 before performing any of the following procedures.
IB2 (NCU Interface Board) and EIB (NCU Extended Interface Board) Replacement
NOTE!
Refer to
Figure 7
for IB2 and EIB board location. Refer to
Figure 19
and
Figure 20
for circuit
card illustrations.
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 may expose service personnel to hazardous potential. Exercise
extreme caution not to inadvertently contact or have any tool inadvertently contact any energized
electrical termination.
2. Open the bay’s front 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. Carefully label the wires connected to the customer connection terminal blocks on the circuit card.
These wires must be connected to the same terminals on the replacement circuit card. Refer to Figure
19 or Figure 20.
5. Carefully label the connectors plugged into the circuit card. These connectors must be plugged into the
same connectors on the replacement circuit card. Refer to Figure 19 or Figure 20.
DANGER! In the next step, external alarm wiring may be energized from an external source. DO NOT
allow bare wire ends to contact any grounded or energized object.
6. Remove the external wiring from the customer connection terminal blocks. DO NOT allow the bare wire
end to contact any grounded or energized object. Isolate the wire end with electrical tape. Repeat for
each wire to be removed.
7. Unplug all connectors plugged into the circuit card.
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