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Magelis STO 501 terminal is dedicated exclusively to communication with ZelioLogic SR2/SR3 range controllers.
It communicates with these controllers via a direct connection cable SR2 CBL 09, using Zelio protocol, which is included in Vijeo Designer V6.1.
Also XBT N401, XBT R411 and XBT RT 511 can have direct connected with Zelio with SR2 CBL 08 cable, using Zelio protocol, which is included in Vijeo Designer Lite V1.3.