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UM1M820BNA User Instructions
Issue AH, March 4, 2013 Spec No. 1M820BNA (Model M820B)
Spec No. 1M820DNA (Model M820D)
34 Chapter 2. Operation
This document is property of Emerson Network Power, Energy Systems, North America, Inc. and contains confidential and proprietary information owned by Emerson Network Power, Energy
Systems, North America, Inc. Any copying, use, or disclosure of it without the written permission of Emerson Network Power, Energy Systems, North America, Inc. is strictly prohibited.
When done, set “Relay Test” to “Disabled”.
2.5.43 Spec. No. 588820300 Battery Rack System (Lithium Ion Battery Configuration)
When the ACU+ is equipped with the Lithium Ion Battery Configuration for use with Spec. No. 588820300
NetSure™ Battery Rack System, the only required settings for battery functions is the float voltage and
ABCL (Active Battery Charge Current Limit) point.
Note: The maximum value that the ABCL point can be adjusted to is 60A, which is below the maximum
current the battery can handle.
The batteries communicate their status and alarms to the ACU+. The ACU+ displays these via the LCD
and WEB interfaces.
Batteries are added to the ACU+ inventory as they are detected. If a battery communications cable is
removed, a Li-Ion Battery Communication Fail alarm is generated. If the controller resets while a Li-Ion
Battery Communication Fail alarm is active, the alarm changes to a Li-Ion Battery Lost alarm. If you clear
any of these alarms, that battery is removed from the ACU+ inventory.