| 摘要 |
PURPOSE:To efficiently detect the disconnection of a magnet coil by eliminating the unnecessary consumption of power energy, by providing a photocoupler along with a first transistor and a second transistor and operating the photocoupler if necessary by the second transistor. CONSTITUTION:When a power source is closed, an operation order signal is outputted from the outlet port of a microcomputer circuit if necessary in timing performing no driving of a movable body immediately before the driving of the movable body is started or after a magnet coil 1 is excited a definite number of times to turn a second transistor 3 ON and, by this operation, it is detected whether the output of the collector of the light receiving transistor in a photocoupler 8, that is, the output of the terminal part of a main circuit changes to a 0V-level to make it possible to detect the disconnection of the magnet coil 1. |
