Brochures and Data Sheets

NetSure
™
ACU+ Controller (Advanced Control Unit Plus)
User Instructions, UM1M820BNA (Issue AK, March 3, 2014)
Spec. No: 1M820BNA, 1M820DNA Code: UM1M820BNA
Model No: M820B, M820D Issue AK, March 3, 2014
4
Figure 2. Temperature Compensated Voltage Control
Figure 3. Voltage Characteristics on Commercial AC Failure and Automatic Equalize Charging
High and Low Battery Temperature Alarms
The ACU+ Controller can monitor battery temperature via a
temperature sensor mounted on a battery cell. Values for high
battery temperature and low battery temperature alarms can then
be programmed into the ACU+ Controller.
Battery Thermal Runaway Management (BTRM) Feature
You can designate a temperature sensor as the BTRM sensor. The
BTRM sensor has High2 and High1 BTRM temperature alarm limits.
If battery temperature exceeds the “BTRM Temp High2” setting,
system voltage is lowered to the BTRM voltage setting. This
feature can also be disabled.
Battery Discharge Test and Battery Test Logs
The ACU+ Controller can perform battery discharge tests to check
the condition of the battery. There are (3) types of battery
discharge tests.
• Short Time Test
• Time Test
• Stable Current Test
A User can manually start a battery discharge test or program the
ACU+ Controller to automatically start battery discharge tests at
scheduled intervals (cyclic battery tests). During a battery
discharge test, the ACU+ Controller controls the rectifiers output
to place the entire load or partial load on the batteries. The ACU+
Controller monitors the discharge of the battery and saves the
results in a battery test log.
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