A modular electrical control system includes a switch module, having at least an on state and an off state, configured to draw power from an AC power source and to control power delivery to at least one external load, the switch module including a detector that determines whether a neutral wire is connected to the switch module, and a removable user interface module configured to connect to the switch module and receive power from the switch module, wherein the switch module delivers a first amount of power to the user interface module when the detector determines that the neutral wire is connected to the switch module, and delivers a second amount of power to the user interface module lower than the first amount of power when the detector determines that the neutral wire is not connected to the switch module.

A modular electrical bus system for a valve manifold has a communication module, a valve driver module, and a plurality of I/O modules each having a plurality of I/O fittings being both electrically and mechanically connectable together via a bridge member connecting adjacent modules. The bridge member has a housing with an interior for housing electronic components for memory storage or Wi-fi reception and transmission that is operably connected to a complementary electrical fitting constructed to be connected to an electrical fitting of a module of said electrical fieldbus system without adding extra length to said bank of modules of said electrical fieldbus system.

A fieldbus system comprises a switching device, a control device and a fieldbus module connected to a first electrical supply voltage, wherein a value of the first electrical supply voltage is ascertained and transmitted to a control device by the fieldbus module, wherein the ascertained value of the first electrical supply voltage is compared with a predetermined value of the first electrical supply voltage by the control device, wherein, if the value of the first electrical supply voltage that is transmitted to the control device is not concordant with the predetermined value of the first electrical supply voltage, shutdown of a second electrical supply voltage by the switching device is initiated by the control device.

A self-aligning busbar assembly includes a housing, a busbar having a first terminal connecting end, a second terminal connecting end, and a jog portion disposed therebetween, and a front holder coupled to the housing and the busbar. The front holder includes an inner wall defining a busbar receiving aperture to receive at least a portion of the busbar, and at least one flexible tab extending inwardly from the inner wall into the busbar receiving aperture. The at least one flexible tab is configured to bias and center the at least a portion of the busbar within the busbar receiving aperture. At least one clearance is defined in the busbar receiving aperture between the inner wall and the busbar and is configured to enable at least one of the first and second terminal connecting ends to move to account for tolerances and/or variances during installation of the busbar assembly.

A switch-cabinet system comprises a base module with a base housing and at least one functional module with a functional housing. A functional connection element is arranged in the functional housing in the area of a first through-opening on a bottom side of the functional housing. A base connection element is arranged in the base housing in the area of a second through opening on a top side of the base housing. The bottom side of the functional housing rests against the top side of the base housing. The functional and base connection elements engage and form an interface. The system also includes a sealing insert having a frame with a functional section engaging the functional housing and a base section engaging the base housing. The functional section abuts an inner wall of the functional housing. The base section abuts a wall of the base housing defining the second through-opening.

A measuring and/or control system (1), to control for example a machine tool, comprises at least a first and a second unit, each comprising electronic circuits and at least one socket. The systems further includes a multipolar cable (8) containing a plurality of wires (8A) and having a first and a second end, each provided with a multipolar connector (9) adapted to be coupled to a socket of the first unit and second unit. At least one of the multipolar connectors of the multipolar cable is a fast wiring multipolar connector (12) provided with a first body (12A) and a second body (12B), adapted to be plugged into the first body. The first body comprises a support with two opposite faces, a first group of electrical contacts fixed to one of the faces of the support and adapted to be coupled to one of the sockets of the first or second unit, and a second group of electrical contacts fixed to the other face of the support. The second body comprises a frame with a plurality of seats (12S), a plurality of perforating electrical contacts (12P) that are adapted to be coupled to the second group of contacts of the first group, are housed in the seats, and are configured to perforate an insulating sheath which covers the wires (8A) and to fasten and electrically connect the wires and the perforating electrical contacts to each other, and a plurality of movable elements (12D) coupled to the frame and adapted to cooperate, in the seats, with the wires housed in the multipolar cable (8) in order to fasten and electrically connect the wires (8A) and the perforating electrical contacts (12P) to each other.

An expansion module of a programmable logic controller is provided. The expansion module comprises a function body and an expansion base. The function body comprises a housing, a circuit board and a first connector. The circuit board is disposed in the housing. The first connector is connected with the circuit board and is partially exposed from the housing. The expansion base is detachably assembled with the function body and comprises a bracket and a three-way connector. The three-way connector is detachably disposed in the bracket and comprises three conducting terminals. The first conducting terminal and the second conducting terminal are at least partially exposed from the bracket. The third conducting terminal is configured to connect with the first connector. When there are plural expansion modules, two adjacent function bodies can be detachably assembled with each other, and two adjacent expansion bases can be detachably assembled with each other.

A fieldbus system comprises a switching device, a control device and a fieldbus module connected to a first electrical supply voltage, wherein a value of the first electrical supply voltage is ascertained and transmitted to a control device by the fieldbus module, wherein the ascertained value of the first electrical supply voltage is compared with a predetermined value of the first electrical supply voltage by the control device, wherein, if the value of the first electrical supply voltage that is transmitted to the control device is not concordant with the predetermined value of the first electrical supply voltage, shutdown of a second electrical supply voltage by the switching device is initiated by the control device.

A self-aligning busbar assembly includes a housing, a busbar having a first terminal connecting end, a second terminal connecting end, and a jog portion disposed therebetween, and a front holder coupled to the housing and the busbar. The front holder includes an inner wall defining a busbar receiving aperture to receive at least a portion of the busbar, and at least one flexible tab extending inwardly from the inner wall into the busbar receiving aperture. The at least one flexible tab is configured to bias and center the at least a portion of the busbar within the busbar receiving aperture. At least one clearance is defined in the busbar receiving aperture between the inner wall and the busbar and is configured to enable at least one of the first and second terminal connecting ends to move to account for tolerances and/or variances during installation of the busbar assembly.

A measuring and/or control system (1), to control for example a machine tool, comprises at least a first and a second unit, each comprising electronic circuits and at least one socket. The systems further includes a multipolar cable (8) containing a plurality of wires (8A) and having a first and a second end, each provided with a multipolar connector (9) adapted to be coupled to a socket of the first unit and second unit. At least one of the multipolar connectors of the multipolar cable is a fast wiring multipolar connector (12) provided with a first body (12A) and a second body (12B), adapted to be plugged into the first body. The first body comprises a support with two opposite faces, a first group of electrical contacts fixed to one of the faces of the support and adapted to be coupled to one of the sockets of the first or second unit, and a second group of electrical contacts fixed to the other face of the support. The second body comprises a frame with a plurality of seats (12S), a plurality of perforating electrical contacts (12P) that are adapted to be coupled to the second group of contacts of the first group, are housed in the seats, and are configured to perforate an insulating sheath which covers the wires (8A) and to fasten and electrically connect the wires and the perforating electrical contacts to each other, and a plurality of movable elements (12D) coupled to the frame and adapted to cooperate, in the seats, with the wires housed in the multipolar cable (8) in order to fasten and electrically connect the wires (8A) and the perforating electrical contacts (12P) to each other.