| 摘要 |
<p>PURPOSE:To dissolve the problem due to the consumption and deterioration of a contact part and a driving part and to execute the control with high reliability and a durability by using a solid state relay in place of a switch. CONSTITUTION:A solid state relay SSR4 functions as a non-contact relay element to be turned on at the time of impressing an input signal and be turned off at the time of no-impressing. At the time of operating, a switch 6 is shorted between b-c, then, the input side of an SSR4 is turned on and the output side is shorted. Thus, a commercial power source is supplied to the input side of a power source part 1 and an electric power is supplied to a load circuit 2. At such a time, an inverting OFF signal of a central processing part 3 is held at 'H'. Thereafter, a power source resetting is released and the load circuit 2 executes the usual action under the control of the processing part 3. Next, when the switch 6 is short-circuited between a-c, an inversion INT signal comes to be an 'L', interruption the processing part 3 is interrupted and a post- processing before the power source is turned off is executed.</p> |
