The teaching equipment of electromechanical system provided by the present invention is used to connect an emergency stop loop of an electromechanical equipment, including a multi-stage key switch, an enabling switch and a safety control device. The multi-stage key switch is used to switch between a first mode and a second mode. The multi-stage key switch generates a switching signal during switching. The enabling switch is connected to the emergency stop loop. The safety control device is used to receive the switching signal. The safety control device includes a transient emergency stop circuit and a disconnection loop time. The safety control device triggers the emergency stop loop to enter the emergency stop state according to the switching signal. The emergency stop state includes that the transient emergency stop circuit interrupts the emergency stop loop until the disconnection loop time is up.

A safety switch input diagnosis device includes a circuit formed from a series connection of an emergency stop switch and a line having a resistor. A connection state of the emergency stop switch and failure modes of the lines are diagnosed on the basis of a voltage value at one end of the circuit. Consequently, an operation of the switch and failure modes of a circuit relating to the switch can be diagnosed.

In a system for monitoring the operation of a current loop, which is fed by a current source and has a switching element, an evaluation unit is arranged at the output of the current loop, which evaluation unit is designed to identify a state of the switching element on the basis of the current flowing in the current loop. Furthermore, a signal generation device is arranged in the current loop, which signal generation device is connected to the switching element and is designed to generate a dynamic signal characterizing the state of the switching element in the current loop.

A control system including: a stationary control console and a first emergency stop button positioned on the control console, a mobile control unit including a mobile holder and a second emergency stop button arranged on the mobile holder, the control console including at least one cavity, the mobile holder configured to assume a first position in which the second emergency stop button is located inside the cavity to be hidden from a view of a user, and a second position in which the second emergency stop button is outside the cavity.

A switching apparatus for electric power distribution grids including: a withdrawable first switching unit having one or more first electric poles; a withdrawable second switching unit having one or more second electric poles and electrically connected ins series with said first switching unit; wherein said second switching unit includes an emergency control arrangement activatable by a user to make said second switching unit to carry out an opening manoeuvre.

Emergency stop for a linear actuator system, which comprises a housing (13) and an activation button (12) adapted for activating a circuit breaker and where the activation button (12) has a neutral position and an emergency position. The emergency stop further comprises a spring (19) for spring-loading the activation button (12) for retaining the activation button (12) in the neutral position, a latching mechanism adapted for retaining the activation button (12) in the emergency position once it has entered this position, and a release mechanism adapted to unlatch the latching mechanism. The spring-loaded activation button (12) is pivotally connected to the housing (13) and arranged to pivot between the neutral position and the emergency position. The spring-loaded activation button (12) comprises an arm (26,27) having one end attached to the underside (24) of the spring-loaded activation button (12). The housing 13 comprises a wall piece (35,36) adapted for engaging a free end of the arm (26,27). The latching mechanism comprises a protruding part (61,62) on the arm (26,27) and a receiving part (39,40) on the wall piece (35,36), said protruding part (61,62) and said receiving part (39,40) being unlatched when the activation button (12) is in the neutral position and latched when the activation button (12) is in the emergency position. The release mechanism comprises a reactivation button (14,15) movable between a first and second position, said reactivation button (14,15) unlatches the latching mechanism by disengaging the protruding part (61,62) from the receiving part (39,40) when the reactivation button (14,15) is moved from the first position to the second position.

The invention relates to a protective collar for at least partially receiving an actuating element which extends through a housing of a control unit and projects beyond an outer side of the housing. The protective collar has a base with a through-opening and a first circumferential collar radially spaced from the through-opening and extending from an upper surface of the base in a first direction. The first collar has at least two cut-outs such that the first collar forms at least two wings, wherein at least one of the wings has at least one predetermined breaking point extending in the circumferential direction.

A safety switch actuation device for keeping the pushbutton switch activated and deactivated remotely, the actuation device comprising a plunger which can be brought by external probing from a standby position, in which it does not switch the pushbutton switch, to an active position, in which it keeps said pushbutton switch actuated, characterized in that the actuation device has a remotely controllable linear drive, a return spring and a return actuator and is designed in such a way that the plunger can be coupled to the return actuator by the remotely controllable linear drive, which is preferably driven by a Bowden cable, under tension of the return spring, which, after deactivation of the linear drive, is pressed by the return spring into a position more remote from the pushbutton switch, thereby entraining the plunger into its standby position.

A switch is disclosed. In some examples, a switch includes a generally cylindrical housing; one or more sets of contact points enclosed by the housing; an indicator module, such as a multi-color LED illuminator, also enclosed by the housing; and a pushbutton actuator disposed to operate the contact points. The housing includes a display section spanning substantially the entire circumference of the housing such that the indication made by the indicator module is visible from all radial directions. When the pushbutton actuator is pressed, some of the contact points open to cut off power from hazards, while others are reconfigured to change the state of the indicator module to indicate the changed status of the switch. Multiple switches can be interfaced with each other, such as by serial connection, to facilitate multi-switch safety environment. Modular cables can be used to conveniently establish the interface.

A push-button switch assembly with means for indicating a switch status includes: an actuation head for actuating the push-button switch assembly, the actuation head having a disc-shaped upper part and a tubular lower part; a sleeve-type push-button guide which is coupled to the actuation head such that, in relation to a longitudinal axis of the push-button switch assembly, the upper part is arranged above the push-button guide and the lower part surrounds the push-button guide; and a light guide for guiding light, the light guide being coupled to the actuation head such that, in relation to the longitudinal axis, at least portions of the light guide are arranged within the actuation head and within the push-button guide. The light guide extends through the actuation head with a top end in a predetermined position such that the push-button switch assembly is illuminatable in a predetermined manner by a light beam.