Depending on Altivar type, for example ATV6000, ATV630, ATV930 allows connection of min 1 and max 6 PTC sensors connected in series.
In this case with 6 PTCs if they are connected in star like:
EP1-PTC1-PTC2-STAR,
EP2-PTC3-PTC4-STAR,
EP3-PTC5-PTC6-STAR
(EP means endpoint),

then only 4 PTCs can be connected: ATV(AIx)-EP1-PTC1-PTC2-PTC4-PTC3-EP2-ATV(COM). Star point and third rung with EP3 will remain not connected.

Publisert for: Schneider Electric Norway