Simga2N Traction Advanced Manual– V1.3 Page 35 (166) ©2021 DMC GmbH Herten Germany
Wiring examples with external line contactor management and independent logic supply
The following examples represents the suggested wiring for a situation in which the Key line for DMC Sigma2N Controller
is separated from the main power source.
Please notice that the DC/DC converter supplying the Sigma2N key line must be at least capable of outputting 5W for
supplying the control logic. In case the application needs the DMC Sifgma2N Controller to drive one or more Digital
Outputs, the user should consider upsizing the overmentioned DC/DC converter taking into account 2A for each driven
output. Mind that the outputs will be driven at Key line voltage.
! Notice: the above scheme has to be followed strictly. Any variation must be agreed with DMC engineering first.
The following example represents the case in which the power battery embeds a dedicated output at 12 or 24V and
therefore an auxiliary battery is not needed. Notice that in this case this output must be capable of outputting enough
power for satisfying the consumption of DMC Sigma2N Controller and all the connected auxiliary devices.
The consideration at the begin of this section remain valid.
! Notice: the above scheme has to be followed strictly. Any variation must be agreed with DMC engineering first.
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