Innovative Circuit Technology Ltd.
11
Make Battery Connections to BMMD
The Battery Management Module (BMMD) provides a convenient and safe way
to connect one or two external back-up batteries to the MPS Ultra system. Two
high current hydraulic-magnetic circuit breakers (100A standard) provide over
current protection, while an internal 150A LVD contactor will disconnect the
battery string(s) should it discharge below a safe level. Both battery strings are
routed through the same LVD contactor, so an under-voltage condition will
disconnect both battery strings. Internal battery current monitoring provides a
full suite of remote battery charge monitoring features.
WARNING
Risk of serious personal injury or damage to equipment and property! Always
observe the following!
•
When connecting a battery ensure the nominal battery voltage is correct
for the model of Power Modules installed, and that the battery positive is
connected to the positive (+) terminal and the battery negative is
connected to the (-) terminal. The BAT terminal on the BMMD may be
internally tied to the (+) or (-) system output through the LVD contactor,
depending on the polarity of the power system used.
Check polarity of the
system before connecting a battery to the BMMD!
•
Only use the Equalize Charge setting for flooded lead-acid batteries in a
well-ventilated location.
Do not use Equalize Charge on sealed batteries!
Always consult with battery manufacturer and observe all battery
manufacturer recommendations.
•
Do not tie either of the DC main outputs to the BAT terminal on the BMMD,
as this may short circuit the battery or will bypass the internal LVD circuitry
in the BMMD.
•
Make any earth Ground connection to only a single LOAD or BAT terminal if
required. Do not ground both the load and battery as this may bypass the
internal LVD circuitry.
•
Use wire and connectors appropriately rated for the highest possible
system current when making connections to the battery, BMMD, and DC
main outputs.
Ensure that the default system output voltage and current limit match the
requirements of the battery and the loads to be connected. Adjust the system
Output Voltage and Current Limit (see System Settings section) to match the
combined battery and system load requirements before making final
connections, if required. If using dual battery strings,
use only identically rated
battery strings
to ensure equal charging of each battery set.
Verify the polarity of BMMD installed in your MPS Ultra system by noting the label
under the rear BAT bus bar input. (“
BAT +
” indicate
s a positive battery voltage
system with the LVD contactor and battery breaker internally connecting this