An incorrect insertion and removal prevention system that can prevent an operator from incorrectly selecting a port to be operated without sacrificing the port mounting density is described. An optical transmission device 100 of the incorrect insertion and removal prevention system includes a plurality of ports 101 for transmitting and receiving an external signal, a touch sensor 102 installed in each of the ports 101 to detect a contact of the human body, a control unit 110 for causing a display unit 130 to display information about the port 101 corresponding to the touch sensor 102 detecting the contact of the human body, a storage unit 120 for storing information for distinguishing each port 101, and the display unit 130 for displaying the information for distinguishing each port 101.

An electronic device includes a first main body, a first electrical connector, and an insert member. The first main body has an insertion end and one or more holes located at the insertion end. The first electrical connector is disposed at the insertion end. The insert member is coupled to the first main body through the one or more holes and includes a plurality of ribs and a plurality of removed portions. Each of the ribs extends away from the insertion end. The ribs and the removed portions are sequentially and linearly arranged according to a coding pattern.

An electronic device includes a first main body, a first electrical connector, and an insert member. The first main body has an insertion end and one or more holes located at the insertion end. The first electrical connector is disposed at the insertion end. The insert member is coupled to the first main body through the one or more holes and includes a plurality of ribs and a plurality of removed portions. Each of the ribs extends away from the insertion end. The ribs and the removed portions are sequentially and linearly arranged according to a coding pattern.

A module arrangement for a modular field device connection unit comprises a frame module having an interface receptacle, an interface module adapted to be inserted into the interface receptacle along a module insertion path, and a resetting mechanism adapted to reset the movable coding element into the neutral position by insertion of the interface module into the interface receptacle and/or removal of the interface module from the interface receptacle. The interface module has a cartridge receptacle and a movable coding element. The movable coding element is movable from a neutral position into a coding position by insertion of a cartridge member into the cartridge receptacle. The resetting mechanism has a trigger element at least partially protruding into the module insertion path.

An alternating current/direct current input device includes an appliance input socket and an information and communications technology (ICT) device. The ICT device is powered by the appliance input socket. The appliance input socket includes a ground contact, a positive electrode contact, a negative electrode contact, and a signal switch. A contact depth of the signal switch in the appliance input socket is less than a contact depth of the positive electrode contact or the negative electrode contact in the appliance input socket. The signal switch is configured to generate a control signal when a direct current connector is separated from the appliance input socket. The control signal can be used to enable the ICT device to disconnect the appliance input socket from a conductive electrode of the direct current connector after the ICT device enters a no load state.

An electrical device includes a connection part and a cover part connected to the connection part. A mounting part is accommodated and situated in the connection part, and a first circuit board is connected to the mounting part in a coded manner. A second circuit board is situated in the cover part, which is connected to a frame part in a coded manner. The first circuit board is connected to a plug connector part, and the second circuit board is connected to a mating plug connector part. A leading guide for a plug connection is provided on the mounting part, which becomes active when the cover part is connected to the connection part. The frame part being able to be connected to the mounting part in a coded manner.

An alternating current/direct current input device includes an appliance input socket and an information and communications technology (ICT) device. The ICT device is powered by the appliance input socket. The appliance input socket includes a ground contact, a positive electrode contact, a negative electrode contact, and a signal switch. A contact depth of the signal switch in the appliance input socket is less than a contact depth of the positive electrode contact or the negative electrode contact in the appliance input socket. The signal switch is configured to generate a control signal when a direct current connector is separated from the appliance input socket. The control signal can be used to enable the ICT device to disconnect the appliance input socket from a conductive electrode of the direct current connector after the ICT device enters a no load state.

An incorrect insertion and removal prevention system that can prevent an operator from incorrectly selecting a port to be operated without sacrificing the port mounting density is described.

An optical transmission device 100 of the incorrect insertion and removal prevention system includes a plurality of ports 101 for transmitting and receiving an external signal, a touch sensor 102 installed in each of the ports 101 to detect a contact of the human body, a control unit 110 for causing a display unit 130 to display information about the port 101 corresponding to the touch sensor 102 detecting the contact of the human body, a storage unit 120 for storing information for distinguishing each port 101, and the display unit 130 for displaying the information for distinguishing each port 101.

An electronic device includes a first main body, a first electrical connector, and an insert member. The first main body has an insertion end and one or more holes located at the insertion end. The first electrical connector is disposed at the insertion end. The insert member is coupled to the first main body through the one or more holes and includes a plurality of ribs and a plurality of removed portions. Each of the ribs extends away from the insertion end. The ribs and the removed portions are sequentially and linearly arranged according to a coding pattern.

Examples described herein include a backplane keying mechanism. The backplane keying mechanism may include a backplane, a first connector, a second connector, a first block for the first connector, and a second block for the second connector. The first block and the second block may be moveable as one unit on the backplane from a first state to a second state. In the first state, the first block allows the first connect to connect to a first type of device and the second block allows the second connector to connect to the first type of device. In the second state, the first block prohibits the first connector from connecting to the first type of device and the second block prohibits the second connector from connecting to the first type of device.