SuperSigma2 QRM PMS – V01.02.02 17-1-2020 Page 11 (58) ©2019 DMC GmbH Herten Germany
5.6 Contactors
The contactor mounting plane can affect performance; contactors should never be mounted with their terminal studs
vertically down. For further applications information on contactors, please consult DMC GmbH in Herten.
As blow-out magnets are fitted to contactors (except 24V) ensure that no magnetic particles can accumulate in the
contact gaps and cause malfunction. Ensure that contactors are wired with the correct polarity to their power terminals
as indicated by the + sign on the top moulding.
The SuperSigma2 can be used with permanently-connected on-board chargers, as long as the maximum allowed voltage
of the particular controller model is not exceeded. If the batteries should not be charged during operation, a change-
over contactor as line contactor is a good solution to fit both the charger and the controller in the truck.
5.7 Flashing new software
When flashing the controller with a new software version, ALWAYS carefully check ALL parameters after flashing to be
correct. Only qualified engineers are allowed to update the controllers firmware.
5.8 Power up Delay
At first power up the internal capacitor bank needs to be charged. The controller has a build in pre-charge resistor, and
is monitoring the capacitor bank voltage. As soon as the voltage is at the required level, the line contactor will pull in.
Specially at 24V systems using a Large size controller, the time delay to charge the capacitor bank can by longer.
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