Abstract: A device includes a housing including a rail mount and a stopper to lock an engagement flange (RAb) on a DIN rail (RA) with the rail mount receiving the DIN rail (RA). A locking member is at a locking position to lock an engagement flange (RAb) on the DIN rail (RA) and at a release position to unlock the engagement flange (RAb) with the rail mount receiving the DIN rail (RA). A release button including a pressing portion to be pressed by a user is located in the housing with the pressing portion exposed outside the housing. An arm moves the locking member from the locking position to the release position in response to movement of the release button from a standby position to a pressed position deeper in the housing than the standby position.

Abstract: A device includes a housing including a rail mount and a stopper to lock an engagement flange (RAb) on a DIN rail (RA) with the rail mount receiving the DIN rail (RA), a locking member to be at a locking position to lock an engagement flange (RAb) on the DIN rail (RA) and at a release position to unlock the engagement flange (RAb) with the rail mount receiving the DIN rail (RA), a release button including a pressing portion to be pressed by a user and located in the housing with the pressing portion exposed outside the housing, and an arm to move the locking member from the locking position to the release position in response to movement of the release button from a standby position to a pressed position deeper in the housing than the standby position.

Abstract: A wireless communication system includes a plurality of wireless communication devices each including a display unit, and an information terminal device that performs wireless communication with each of the plurality of wireless communication devices. The information terminal device includes a field intensity calculation unit that determines a field intensity of each of the plurality of wireless communication devices, and a communication device selection unit that selects at least one wireless communication device based on each field intensity determined by the field intensity calculation unit.

Abstract: An operation device includes a case, a control board accommodated in the case, and a protective cover for protecting the control board. The protective cover includes a terminal plate, a first dent located on a side of the protective cover opposite to a control board side of the protective cover and having a bottom provided with the terminal, a first groove having a +Z direction end open to the outside of the case through an inlet cutout in the case and a ?Z direction end toward an edge of the protective cover opposite to the cutout, and a second groove having an end communicating with the first groove and the other end communicating with the first dent. The other end of the second groove is nearer an edge of the protective cover adjacent to the cutout than the end of the second groove.

Abstract: Provided is a management apparatus, which is to be connected to a device, and is configured to manage the device. The management apparatus includes: a display unit configured to display a state of the device; and a wireless communication unit configured to wirelessly communicate to and from a mobile terminal. When a distance between the mobile terminal and the management apparatus has become smaller than a threshold value, the management apparatus displays on the display unit management program information on a management program for managing the device.

Abstract: An operation device includes a case, a control board accommodated in the case, and a protective cover for protecting the control board. The protective cover includes a terminal plate, a first dent located on a side of the protective cover opposite to a control board side of the protective cover and having a bottom provided with the terminal, a first groove having a +Z direction end open to the outside of the case through an inlet cutout in the case and a ?Z direction end toward an edge of the protective cover opposite to the cutout, and a second groove having an end communicating with the first groove and the other end communicating with the first dent. The other end of the second groove is nearer an edge of the protective cover adjacent to the cutout than the end of the second groove.

Abstract: A wireless communication system includes a plurality of wireless communication devices each including a display unit, and an information terminal device that performs wireless communication with each of the plurality of wireless communication devices. The information terminal device includes a field intensity calculation unit that determines a field intensity of each of the plurality of wireless communication devices, and a communication device selection unit that selects at least one wireless communication device based on each field intensity determined by the field intensity calculation unit.

Abstract: Provided is a management apparatus, which is to be connected to a device, and is configured to manage the device. The management apparatus includes: a display unit configured to display a state of the device; and a wireless communication unit configured to wirelessly communicate to and from a mobile terminal. When a distance between the mobile terminal and the management apparatus has become smaller than a threshold value, the management apparatus displays on the display unit management program information on a management program for managing the device.