UM1M820BNA User Instructions
Issue AH, March 4, 2013 Spec No. 1M820BNA (Model M820B)
Spec No. 1M820DNA (Model M820D)
2 Chapter 1. Introduction
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Figure 1 illustrates the various methods to interface with the ACU+ Controller remotely.
Figure 1
ACU+ Remote Communications
1.3 Function Descriptions 1.3.1 Rectifier Control
Rectifiers are automatically controlled by the ACU+ Controller. The ACU+ Controller provides an Energy
Optimization Mode function. Energy Optimization permits an installation to only operate rectifiers as
needed to maintain the load and keep batteries in a fully charged condition. As load increases, Energy
Optimization turns on additional rectifiers as needed to maintain the load. As load decreases, Energy
Optimization places rectifiers in standby to conserve energy usage. Rectifiers which are always operating
to maintain any load requirements are cycled through the group of rectifiers controlled by this feature to
provide uniform operating times for each rectifier.
1.3.2 Converter Control
Converters are automatically controlled by the ACU+ Controller.