SAG582140000 SYSTEM OVERVIEW - Emerson Network Power
SAG582140000 SYSTEM OVERVIEW - Emerson Network Power
SAG582140000 SYSTEM OVERVIEW - Emerson Network Power
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<strong>SAG582140000</strong> System Application Guide<br />
Issue AL, April 12, 2010 Spec. No. 582140000 (Model 802NLDB, 802NLEB, 802NL-B)<br />
Home<br />
4.1.5 MCA Audible Alarm and Audible Alarm Cutoff: The MCA contains an Audible<br />
Alarm, which is located on the MCA Control Panel. The audible alarm sounds when<br />
any alarm condition monitored by the MCA occurs. The alarm can be manually silenced<br />
(cutoff) by pressing a local pushbutton. A local indicator illuminates when the audible alarm<br />
has been cutoff. The alarm remains silenced for the current alarm condition only. If another<br />
alarm condition occurs, the audible alarm again sounds.<br />
A programmable audible alarm cutoff reset feature is provided. Once an audible alarm has<br />
been cutoff, it automatically resets (and sounds if the alarm condition is still present) after the<br />
time period programmed expires. If another alarm condition occurs, the audible alarm again<br />
sounds.<br />
4.1.6 Remote On/Off (TR): The operation of any or all Rectifiers can be inhibited (TR) via the MCA<br />
Control Panel or from the LMS (if furnished). A Rectifier fail alarm is NOT issued.<br />
4.1.7 MCA Alarm Logging: The MCA logs (with a date/time stamp) up to 500 recordable events.<br />
4.1.8 Rectifier Sequencing: The MCA can be set to provide Rectifier Sequencing. When the MCA<br />
senses an “AC <strong>Power</strong> is OFF to All Rectifiers” alarm, it turns off all Rectifiers. When the “AC<br />
<strong>Power</strong> is OFF to All Rectifiers” alarm clears, the MCA turns on Rectifier #1, then turns on the<br />
other Rectifiers starting with Rectifier #2 every n seconds (n is user programmable from 1 to 20<br />
seconds). If the MCA fails or the communication link is broken during a Rectifier Sequencing<br />
routine, all Rectifiers turn on immediately.<br />
4.1.9 MCA <strong>Power</strong> Share Feature: The MCA <strong>Power</strong> Share feature allows you to connect the Spec.<br />
No. 582140000 <strong>Power</strong> System to an existing DC power system instead of extending or<br />
completely replacing the existing power system. The MCA <strong>Power</strong> Share feature provides for<br />
the sharing of the total load in a controlled manner. When <strong>Power</strong> Share is programmed, the<br />
MCA in the 582140000 <strong>Power</strong> System adjusts Rectifier output voltage per load demands to<br />
ensure proper sharing between the two systems. For further information, request Application<br />
Note AN38.<br />
4.1.10 MCA Alternate Current Limit Feature: The MCA Alternate Current Limit feature provides a<br />
means to limit the output current of all rectifiers based on the state of an external signal. The<br />
rectifiers output current is limited to a percentage of rectifier output capacity as configured by<br />
the user. A binary input on an installed MCA I/O circuit card is used to monitor the external<br />
signal that triggers the current limiting action.<br />
Page 88 of 107<br />
This document is property of <strong>Emerson</strong> <strong>Network</strong> <strong>Power</strong>, Energy Systems, North America, Inc. and contains confidential and proprietary information owned by <strong>Emerson</strong> <strong>Network</strong> <strong>Power</strong>, Energy<br />
Systems, North America, Inc. Any copying, use, or disclosure of it without the written permission of <strong>Emerson</strong> <strong>Network</strong> <strong>Power</strong>, Energy Systems, North America, Inc. is strictly prohibited.
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