Abstract: The invention relates to an electrical module, comprising a first electrical interface, said module being attachable to an electrical device for connecting said first electrical interface to said device. The electrical module is characterised by at least one locking device adapted to prevent movement of said module in relation to said electrical device in at least one direction, said locking device comprising a first part which is movable along a first axis and a second part which is turnable about a second axis, the second part being movable to a locking position by turning about said second axis in response to linear movement of the first part along said first axis, said second axis having an extension which is different from the extension of said first axis, and said second part being adapted for engagement with said electrical device in said locking position.

Abstract: The invention relates to an electrical module (1), comprising a first electrical interface means (11), said module (1) being attachable to an electrical device for connecting said first electrical interface means (11) to said device. The electrical module (1) is characterised by at least one locking means (15) adapted to prevent movement of said module (1) in relation to said electrical device in at least one direction, said locking means (15) comprising a first part (16) which is movable along a first axis and a second part (17) which is turnable about a second axis, the second part (17) being movable to a locking position by turning about said second axis in response to linear movement of the first part (16) along said first axis, said second axis having an extension which is different from the extension of said first axis, and said second part (17) being adapted for engagement with said electrical device in said locking position.

Abstract: A device for use when exchanging data between two processor units comprises a first processor unit, which is arranged to selectively operate in one of a synchronous mode and an asynchronous mode when exchanging data with a second processor unit through a data memory area in a common memory. Preferably, the access to the data memory area is controlled by a state machine in the first processor unit. The state machine has a first state in which the data memory area is free, a second and a third state in which the data memory area is reserved for the first processor unit and the second processor unit, respectively, and a fourth and a fifth state, in which the data memory area is accessed by the first processor unit and the second processor unit, respectively. The device is advantageously used in a fieldbus system.