TestWorks Group has developed a solution for testing modular industrial machine safety interlock controls. The product to be tested can be configured by the manufacturer to have a varying quantity of ‘elements’, including push buttons and key switches, each with different functions. Testing was required to be as automated as possible, therefore the operator connects the ‘stack’ to the tester, and the works order no. is scanned by a barcode reader. The system then automatically configures all required tests so that each element is then tested to its individual specification. For units which pass all tests, product and shipping labels are printed and all results stored to a database.