BÜTTNER ELEKTRONIK – Batt erie-Control-Booster MT BCB 30/30, MT BCB 40/40, MT BCB 60/40
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Depending type of EBL, either the starter battery connection cable can be removed or disconnec-
ted from the EBL with the additional NC relay (high-load relay EBL – 80 A) only while driving.
The closed relay ensures that the starter battery voltage is displayed on the control panel when
the vehicle is stationary.
Special case: Alternatively, with the CBE distribution box (DS470), the control of the internal bat-
tery separator relay can be disabled by removing the resistor “R47”. As a result, the starter battery
connection on the distribution box and thus its voltage display on the control panel is retained.
(Please contact our customer service for detailed information)
Remarks:
• The high-load relay (NC) is controlled via the D +/ignition key (Term. 15) – signal of the vehicle
and “opens” simultaneously when the battery separator relay is closed, thus separating the
starter battery from the EBL and the BCB delivers full charging power. Use installation cable set
(Überbrückungs-Relais-Einbaukabelsatz MT 93050) if necessary.
• When connected to the mains, the board battery will be charged and the starter battery be
maintained in charge with max. 10 A.
• In mains operation, the BCB supports the existing charger and the charging currents are adding
up. The temperature-controlled charging can only work correctly if the originally present char-
ger also applies temperature compensation. If this is not the case, we recommend deactivating
the existing charger in order to achieve the optimal service life of your high-quality battery. In
particular, when using LiFePO
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board batteries, the originally present charging devices must be
deactivated, especially since they also do not have lithium battery charging characteristics.
• With the EBL (Schaudt), the charger can be deactivated by removing the fuse “charger”. If the
power cable remains plugged in, the power detection signal continues to be available in the
control unit. In the case of CBE equipment, one cable from the charger output to the CBE distri-
bution can be interrupted in order to disable the charging function, but to receive the “mains
present”-signal on the board control panel. If necessary, when disabling/removing the CBE
charger, connect the BCB output “Ntz” to “J10” in the CBE distribution box.
• Please pay attention to the recommended cable cross-sections and proper cabling!
