Safety switch and switch system

A switch system comprising a plurality of safety switches comprising a first safety switch and a second safety switch,

• wherein each safety switch of the plurality of the safety switches comprises:
• a setting unit configured to set an operation mode of each safety switch of the plurality of the safety switches;
• an output unit configured to output a mode notification signal for indicating whether the operation mode of each safety switch of the plurality of the safety switches is in a maintenance mode;
• an input unit configured to receive an input of a display control signal based upon a system operation mode which is an operation mode of the switch system;
• and
• a display unit configured to display an indication based upon the display control signal,
• wherein in response to reception of the input of the display control signal which is based upon a fact that the system operation mode is in a system maintenance mode indicating that at least one of operation modes of each safety switch of the plurality of the safety switches and at least one other safety switch out of the plurality of safety switches is set to the maintenance mode, the display unit displays the indication indicating that the system operation mode is in the system maintenance mode,
• wherein an output unit of the second safety switch is configured to output the mode notification signal to the first safety switch, and
• wherein the first safety switch is configured to set the system operation mode based upon the operation mode set by the setting unit of the first safety switch and the mode notification signal from the second safety switch, and output the display control signal based upon the system operation mode to the second safety switch.

A switch system comprising a plurality of safety switches comprising a first safety switch and a second safety switch,

• wherein each safety switch of the plurality of the safety switches comprises:
• a setting unit configured to set an operation mode of each safety switch of the plurality of the safety switches;
• an output unit configured to output a mode notification signal for indicating whether the operation mode of each safety switch of the plurality of the safety switches is in a maintenance mode;
• an input unit configured to receive an input of a display control signal based upon a system operation mode which is an operation mode of the switch system;
• and
• a display unit configured to display an indication based upon the display control signal,
• wherein in response to reception of the input of the display control signal which is based upon a fact that the system operation mode is in a system maintenance mode indicating that at least one of operation modes of each safety switch of the plurality of the safety switches and at least one other safety switch out of the plurality of safety switches is set to the maintenance mode, the display unit displays the indication indicating that the system operation mode is in the system maintenance mode,
• wherein an output unit of the second safety switch is configured to output the mode notification signal to the first safety switch, and
• wherein the first safety switch is configured to set the system operation mode based upon the operation mode set by the setting unit of the first safety switch and the mode notification signal from the second safety switch, and output the display control signal based upon the system operation mode to the second safety switch,
• wherein in a case where the system operation mode is set to the system maintenance mode, an output unit of the first safety switch outputs a control signal based upon the setting of the system maintenance mode to a control device configured to control an operation of a device to be maintained,
• wherein in a case where the system operation mode is set to the system maintenance mode and at least one of the plurality of safety switches provided in the switch system detects presence of abnormality, the output unit of the first safety switch outputs the control signal based upon detection of the presence of the abnormality to the control device.