| 摘要 |
PROBLEM TO BE SOLVED: To obtain an operating system which includes a checking switch 4 for allowing/inhibiting the operation of controlled equipment as appropriate, wherein the system can inhibit the operation even if a short-circuit or the like occurs between the switch 4 and a control device 3. SOLUTION: The operating system is formed of the checking switch 4, the control device 3 for controlling the controlled equipment, based on an operating state of the switch 4, and the controlled equipment 24. The checking switch 4 and the control device 3 or the controlled equipment are arranged at locations between a chassis and a door. According to the operating system, the operation of the controlled equipment is inhibited when the switch 4 is opened, and the operation of the former is allowed when the latter is closed. The operating system is comprised of a signal issuing means 3a for issuing switch condition checking signal from the control device 3 to one terminal 4a of the switch 4, and a signal detecting means 3b for detecting the signal at the other terminal 4b. Thus, only when the corresponding signal is detected by the signal detecting means 3b, the operation of the controlled equipment is allowed. |
