The "AS-Interface^® safety system" enables the connection of binary switching safety-related components, such as emergency stop switches, door contact switches or safety light curtains to the AS-Interface^® network. The other AS-Interface^® components (masters, slaves, power supplies, repeaters) remain unchanged. The signals of the safety sensors are evaluated by a safety monitor which does not only monitor the switching signals of the safety sensors but also continuously tests the correct function of the data transmission.

A 60 page booklet recently published by the Occupational Health and Safety Administration presents an excellent overview of the need and application of machine safety guarding and electronic machine safety devices. The publication, titled “Safeguarding Equipment and Protecting Employees from Amputation”, provides a wealth of general information regarding the concept of machine safety and how the OSHA Standards apply.