4.3.2 Access to POWERLINK Objects through untrusted networks

The SDO protocol defined by POWERLINK is a Client/Server protocol to access POWERLINK Objects in a POWERLINK Object Dictionary, but this protocol does not support security.

The definition of SDO services over OPC UA allows secure SDO connections between POWERLINK Devices using the standard security mechanisms provided by OPC UA.

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Figure 10 – SDO access through untrusted networks