System Application Guide
SAG582127000
Spec. No. 582127000 (Model 721
NPBB
)
Issue AF, February 26, 2014
Page 99 of 125
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Optional LVD Driver
Lite Circuit Card
LVD Inhibit Switch
LVD Inhibit
Active Indicator
Momentary UP / Middle / Down
Momentary UP Position: Closes all LVD Contactors (inhibit mode).
Middle Position: OFF (ACU+ DOES NOT control LVD’s) (inhibit mode).
DOWN Position: ON (ACU+ controls LVD’s).
J1
J3
J2
Notes:
1. Connects up to (2) LVD
contactors rated at 600A or less.
2. Only one (1) contactor per level
can be accommodated. J2 and J3
are on Level 2, only one (1) of these
connectors can be used at a time.
3. Switch and indicator located
on circuit card installed in
Main Bay only.
J1
To LVLD contactor, uses ACU+
LVD1 control setting (Level 1).
J3
To LVLD contactor, uses ACU+
LVD2 control setting (Level 2).
J2
To LVBD contactor, uses ACU+
LVD2 control setting (Level 2).
Can only be used if it is contained
in a List 21 (1-row) cabinet.