Application Guide

System Application Guide SAG582140001
Spec. No. 582140001 (Model 801
NLDB, 801NLEB, 801NL-B) Issue AN, June 4, 2014
Page 99 of 115
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(N) Low Battery Ambient Temperature #2 Alarm (if battery charge digital
temperature compensation probe installed): Adjustable from -49°C to +100°C.
You disable the feature by selecting the setting below -49°C. Factory set to off, unless
otherwise specified.
(O) Audible Alarm Cutoff Reset Feature: Adjustable from 0 to 15 minutes, in one minute
intervals. A zero setting disables the feature. Factory set at 15 minutes, unless otherwise
specified.
(P) Rectifier Module Sequencing: The time delay between turning individual Rectifier Modules
on is adjustable from 1 to 20 seconds, or feature disabled. The Rectifier Module Sequencing
feature is factory set to ‘disabled’.
(Q) Timed Test/Equalize Period (also enables/disables the manually initiated timed
test/equalize feature): Adjustable from 1 to 99 hours, in one hour intervals. When a value
is set, the feature is enabled. You disable the feature by selecting the setting above 99.
Factory set at 1 (one) hour, unless otherwise specified.
(R) Automatic Test/Equalize Period (also enables/disables the automatic test/equalize
feature): Adjustable from 0 to 15 times the discharge time period, up to a maximum of 300
hours. A zero (0) setting disables the feature. Factory set at zero (0), unless otherwise
specified.
(S) Relay Test Seconds: Adjustable from 5 to 120 seconds, in one second intervals. Factory
set at 45 seconds, unless otherwise specified.
6.1.5 MCA Audible Alarm and Audible Alarm Cutoff: The MCA contains an Audible Alarm, which is
located on the MCA Control Panel. The audible alarm sounds when any alarm condition
monitored by the MCA occurs. The alarm can be manually silenced (cutoff) by pressing a local
pushbutton. A local indicator illuminates when the audible alarm has been cutoff. The alarm
remains silenced for the current alarm condition only. If another alarm condition occurs, the
audible alarm again sounds.
A programmable audible alarm cutoff reset feature is provided. Once an audible alarm has been
cutoff, it automatically resets (and sounds if the alarm condition is still present) after the time
period programmed expires. If another alarm condition occurs, the audible alarm again sounds.
6.1.6 Remote On/Off (TR): The operation of any or all Rectifier Modules can be inhibited (TR) via the
MCA Control Panel or from the LMS (if furnished). A Rectifier Module fail alarm is NOT issued.
6.1.7 MCA Alarm Logging: The MCA logs (with a date/time stamp) up to 500 recordable events.
6.1.8 Rectifier Module Sequencing: The MCA can be set to provide Rectifier Module Sequencing.
When the MCA senses an “AC Power is OFF to All Rectifier Modules” alarm, it turns off all
Rectifier Modules. When the “AC Power is OFF to All Rectifier Modules” alarm clears, the MCA
turns on Rectifier Module #1, then turns on the other Rectifier Modules starting with Rectifier
Module #2 every n seconds (n is user programmable from 1 to 20 seconds). If the MCA fails or
the communication link is broken during a Rectifier Module Sequencing routine, all Rectifier
Modules turn on immediately.
6.1.9 MCA Power Share Feature: The MCA Power Share feature allows you to connect the Spec.
No. 582140001 Power System to an existing DC power system instead of extending or
completely replacing the existing power system. The MCA Power Share feature provides for the
sharing of the total load in a controlled manner. When Power Share is programmed, the MCA in
the 582140001 Power System adjusts PCU output voltage per load demands to ensure proper
sharing between the two systems. For further information, request Application Note AN38.
6.1.10 MCA Alternate Current Limit Feature: The MCA Alternate Current Limit feature provides a
means to limit the output current of all rectifiers based on the state of an external signal. The
rectifiers output current is limited to a percentage of rectifier output capacity as configured by the
user. A binary input on an installed MCA I/O circuit card is used to monitor the external signal
that triggers the current limiting action.
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