Modular Power Series
855-340-004_Rev2.0_Instruction Manual
Page
13
of 81
NOTE: Use only identically rated battery strings for the dual battery BMM
option to ensure equal charging of each battery set.
2.
Verify the polarity of the BMM installed in the unit by noting the label
under the rear BMM BAT bus bar input. "BAT +" indicates a positive
battery voltage system with the LVD contactor and battery breaker
internally connecting this terminal to the shelf "+" output, while "BAT −"
indicates a negative battery voltage system, with the LVD contactor and
battery breaker internally connecting this terminal to the shelf "−" output
(see Figure 7 and Figure 8).
Figure 7. The BMM
Figure 8. The BMMDP
NOTE: Use wire and connectors appropriately rated for the highest possible
system current when making connections to the battery, BMM, and
power shelf.
3.
Connect the battery hot lead (see comment on polarity above) to the
BMM BAT bus bar, and the battery return lead to the main shelf output
bus bar of the corresponding polarity (i.e., a positive voltage system will
have the battery (+) tied to the BMM terminal, with the battery (−) tied to
the main NEG output busbar; a negative voltage system will have the
battery (−) tied to the BMM terminal, with the battery (+) tied to the main
POS output busbar). Install an appropriate inline DC overcurrent
protection device, such as a fuse or circuit breaker on the battery hot
lead.
Table 10. Available BMM Variations (cont'd on next page)
−V BAT
+V BAT
Description
Connections
BMM
BMMP
Single 100 A battery circuit breaker
with LVD contactor with advanced
battery management capability
Single BAT input bus
bar (+ or
− polarity)
BMMD
BMMDP
Dual 100 A battery breakers to
connect two identical battery strings
through an LVD and current sensor
with advanced battery management
capability for the combined battery
BAT 1 and BAT 2
input bus bars (both
or
− polarity)
