Arm module for a modular robot arm of an industrial robot

An arm module having a housing, which comprises:

• at least a first connection side, and
• at least a second connection side;
• wherein the first connection side is configured to be rotated controllably about an axis of rotation relative to the second connection side,
• wherein the first connection side comprises a rotatable first connection device and the second connection side comprises a second connection device which is rotationally fixed to the housing and having a rotation-compatible data transmission device for transmitting data signals along a transmission path between the first connection side and the second connection side,
• wherein the transmission path comprises at least one wireless transmission sub-path for wirelessly transmitting data signals and at least one wire-guided transmission sub-path for wire-guided transmission of data signals, and
• wherein the rotation-compatible data transmission device comprises at least a first wireless transceiver unit and at least a second wireless transceiver unit, each of which is connected to one another via the transmission path and is configured to wirelessly transmit and receive data signals along the at least one wireless transmission sub-path;
• wherein the first rotatable connection device is connected to a drive shaft of a drive device of the arm module in an un-rotatable manner, and wherein the first connection side is rotatable relative to the housing via the first connection device.