[Q] CE approved robot communication protocol

Does anyone know what forms of wireless comms protocols are acceptable for CE approval in regards to safety etc? I know the original Kiva bot used to use a standard WiFi card (seen in tear down articles), but to my knowledge WiFi is not an approved industrial machine communication protocol, especially in the questions of issuing emergency stop commands etc.

Use case in this scenario is a warehouse robot that carries items around.

Help appreciated on this one.

submitted by /u/daftbadgerz
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