| 摘要 |
In a domestic appliance such as a washer, dishwasher, dryer, beverage preparation device or the like having several control circuits driven by varying voltage supplies, the input control circuit is supplied with a relatively low voltage and is electrically isolated from higher voltages within the circuitry of the appliance. An optical isolator is provided in the communication channel between the input control circuit and a power control circuit which is connected to circuit elements connected to the A. C. line voltage, The low voltage supply driving the input control circuit is also isolated from the A. C. line voltage. All operator accessible components are coupled to the input control circuit and are therefore isolated from the A.C. line voltage.
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