| 摘要 |
PURPOSE:To attain the safe and accurate sequential operations and at the same time to minimize the number of external cables, by using a unit containing a changeover switch, operating switches and pilot lamps to operate sequentially many auxiliary device motors, solenoid valves, etc. CONSTITUTION:A unit is provided with a changeover switch 101 and push-button switches 102-105 incorporating pilot lamps. In a single operation time, the switch101 is set at a position a. Then the switch 102 (alternative) is operated singly as long as the start interlocks 113 and 114 of a machine A are satisfied. When the switch 103 is operated, a start relay 115 and then a contact device 117 are actuated. Then the machine A is started. Hereafter the machine A is started sequentially among positions B-I. The actuation of the machine A is stopped in the same way of the starting time. That is, the switch 104 is operated to actuate a stop relay 116.
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