asserting

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Fire Alarm System для судна

Automatic Control - An automatic
control describes an action made when certain conditions
are fulfilled. The condition can be fulfilled when
an LFNet message is received or an input or button is
activated. The action can be activating the outputs, asserting
a LED or sending an LFNet message

Что здесь подразумевается под "asserting"?

Спасибо!