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Not all unit variants are available for download as a 3D model.
Units with fieldbus connection are designated as "Fieldbus" instead of the respective two-digit "FB" designation. The mechanical difference consists only in the different fieldbus connectors, which are shown in the model with placeholders. The exact plug shape can be found in the respective manual.
Example: Device used: I20-2-PN-S -> 3D model: I20-2 Fieldbus-S
At the unit variants "B" and "C" the difference consists only in the RS232 interface.
"B" = without RS232 interface, "C" = with RS232 interface.
Unit variants “O” and “R” have no mechanical difference.
“O” = optocoupler, “R” = relay.