Application Guide

Installation Instructions Section 5876
Spec. No. 582140000 (Models 802
NLDB, 802NLEB and 802NL-B) Issue AT, April 26, 2013
Chapter 5. Installing the Rectifiers and Initially Starting the System Page 5-3
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SETTING SWITCH S1 ON THE MCA CIRCUIT CARD IN THE
PRIMARY POWER/DISTRIBUTION OR POWER ONLY BAY
The MCA circuit card (P/N 509478) installed in the Primary Power/Distribution or Power
Only Bay contains Switch S1. Set the individual switches of S1 per Site requirements.
Refer to Figure 5-1 for switch location and Table 5-1 for switch functions.
The individual switches of S1 have the following functions.
Note that the switch ON position is the UP position.
Switch of S1 Designation Function
1 MCA
When in the ON position,
the MCA section of the
circuit card is disabled.
2 MON
When in the ON position,
changing Power System
settings via LMS is disabled.
3 KEY
When in the ON position,
changing Power System
settings via MCA Keypad is
disabled.
4 PRO
When in the ON position,
the remote uploading of new
firmware into the circuit card
is forced. This switch is used
for diagnostic purposes only.
Table 5-1
MCA Circuit Card Switch S1 Functions
SETTING JUMPER J4 ON MCA DISTRIBUTION
BUS MONITORING CIRCUIT CARDS
The MCA Distribution Bus Monitoring Circuit Cards (P/N 524982) installed in each
distribution bay contain jumper J4. Set this jumper on each circuit card per Site
requirements. Refer to Figure 5-1 for jumper location and the follow for a description of
the jumper.
Note: If a jumper is changed on a live system, an alarm is generated. Update Inventory
to clear the alarm.
Jumper Description
If the jumper is installed between the two pins of J4 on ALL MCA Distribution Bus
Monitoring Circuit Cards, then there is NO A or B distribution designation in the MCA
display of distribution items. If any MCA Distribution Bus Monitoring Circuit Card has the
jumper removed, that distribution bus is designated as B. Those that have the jumper
remaining (installed) are designated as A.