The ABB 3ADT220104R0005 sits in the PLCs & HMIs line as a DeviceNet adapter for the ABB PLC expansion family (, –). It is the slice that bolts onto the back of an ABB controller and brings DeviceNet slave/master visibility onto the same engineering environment as the rest of the I/O on the rack — a communications module rather than a digital or analog point, so it consumes an expansion slot without adding process I/O of its own.
What it physically is
The listing carries a weight of 0.11 kgs — a single-slot module that fits on the ABB expansion backplane without panel structural support. The DeviceNet adapter designation means the field-side connection is a DeviceNet trunk rather than Ethernet or PROFIBUS.
Where the class fits
PLC expansion modules of this shape are the slice that turns a stand-alone controller into a node on a wider fieldbus: a DeviceNet adapter in particular sits in mixed-vendor panels where the upstream device-level network is DeviceNet — common in older material-handling skids, water/wastewater pump stations, and packaging lines that were built before Ethernet/IP became the default. For a controls integrator, the practical implication is that the rest of the I/O is addressed through the ABB engineering environment while the field devices appear as DeviceNet nodes on the same scan.