Tyco Electronics Galaxy SC Controller J85501F-1
Issue 13 February 2001 Installation 3 - 27
MCS Controller
Retrofit
This section provides a method for changing the standard J85501A2
MCS Controller with the J85501F1 Galaxy Controller. Note that if this
procedure is adapted for retrofits of other types of controllers such as
CCS, Galaxy compatable rectifier control cables and possibly different
rectifier circuit packs will be necessary. Refer to Table 3-E.
Note: This procedure will cause the office alarms to operate. Inform the
operating company before starting the procedure.
Before powering down the controller, inform all personnel responsible
for the MCS Plant that all Plant Statistic files may be lost. Some circuit
packs in the left side of the MCS (optional side) controller may lose their
configurations. Plant history files may similarly be lost, unless you write
them down before powering down.
Safety Precautions • Power down the MCS controller when inserting or extracting
boards.
• Changing circuit packs without powering down the controller may
damage the controller and/or circuit packs.
• Observe antistatic precautions during the procedure.
• Mark and tag all cables associated with the change before starting
work.
• When the change is done in a working plant. USE EXTREME
CARE to avoid contact with exposed terminals and busbars.
• Make sure the plant is properly grounded per local building codes
before proceeding.
• Remove all metal jewelry
Power Down MCS 1. Verify that there are no alarms in the controller or any of the
rectifiers. If alarms are present, clear them before proceeding.
2. Open the front door of the MCS Controller by pulling down on the
top side.
Note: Certain older vintages of feeder drain boards will lose their
configuration when the controller is powered down. Record this
information to reprogram the feeder drains, if equipped, after
power up.
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