NetSure
™
Control Unit (NCU)
User Manual, UM1M830BNA
Spec. No: 1M830BNA, 1M830DNA Code: UM1M830BNA
Model No: M830B, M830D Revision M, May 12, 2017
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 NCU 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 NCU.
Battery Thermal Runaway Management (BTRM) Feature
The Battery Thermal Runaway Management (BTRM) feature
reduces voltage during a high battery temperature condition.
You can designate a temperature sensor as the BTRM sensor. The
BTRM sensor has High 2 and High 1 BTRM temperature alarm
limits. If battery temperature exceeds the “BTRM Temp High 2”
setting, system voltage is lowered to the BTRM voltage setting.
This feature can also be disabled.
Battery Discharge Test and Battery Test Logs
The NCU can perform battery discharge tests to check the
condition of the battery(s). There are three (3) types of battery
discharge tests:
Battery Test without Constant Current
Battery Test with Constant Current
Short Time Test (requires two battery shunts)
A User can manually start a battery discharge test or program the
NCU to automatically start battery discharge tests at scheduled
intervals. Twelve (12) Constant Current Tests can be scheduled by
the month-day-year. A Short Time Test can be scheduled to be
performed every 1-365 days. During a battery discharge test, the
NCU controls the rectifiers output to place the entire load or partial
load on the batteries. The NCU monitors the discharge of the
TempComp Coeff
setting (mV/°C).
nom
T
nom
T
V
nom
V
high
V
low
Upper voltage level where temperature compensation
clamps the voltage. Limited to the TEMP COMP MAX V
setting.
Nominal voltage (voltage at nominal temperature).
Lower voltage level where temperature compensation
clamps the voltage. Limited to the TEMP COMP MIN V
setting.
Nominal temperature (no temperature compensation is done at this temperature).
This is the Temp Comp setting.
1V Max (24V System)
2V Max (48V System)
1V Max (24V System)
2V Max (48V System)