Prototype Sorting Items for Disinfection Sterilization Using Smart Relay

Humans have various kinds of needs, namely primary, secondary and tertiary needs. One of the activities to fulfill those needs is to carry out sales and purchase transaction. The development of knowledge and technology makes the process of sales and purchase transaction become easier. Currently, sales and purchase transaction can be carried out online. However, there are many concerns that occur in online transaction, especially during the current pandemic, in which virus can be carried on the purchased items. One of the efforts to reduce the spread of the virus is to carry out disinfection sterilization. Prototype sorting items for disinfection sterilization is one of ways to carry out automatic sterilization. This system uses a smart relay as its main component, and uses ladder diagram programming as instruction. The smart relay used is zelio with 10 I/O. It has an input in the form of a photoelectric sensor that will be directly if there is object in front of it. And also, the addition of a water level sensor is to measure whether the disinfection liquid is ready to use. The output of the smart relay is in the form of a sprayer to spray disinfection liquid, and a dc motor to move object automatically. The dc motor and sprayer become the important points in the disinfection sterilization process. The speed of the dc motor used is 114 RPM with a voltage of 4.4VDC, so that with this speed, the object can reach the sprayer point within 3.5s for high object and 8s for short object. The use of a splitter is to direct short type object using a timer as a determinant of the degree of rotation. The degree of rotation produced must be 45o forward and backward rotation, and the timer used to obtain those degrees is 0.05s for the forward splitter servo motor and 0.1s for the opposite direction until it returns to its initial place.