Technology Sourcebook
www.foodengineeringmag.com/articles/91752-input-expansion-units

Input expansion units
January 10, 2014
elobau input expansion units provide the connection of up to 10 sensors into a single sensor input of the safety controller, offering the capacity of up to 40 sensors while maintaining PLd; errors are detected with an additional monitoring method, even when the series connection is applied. The units offer electronic monitoring of individual channels, eliminating the need for a PLC.
elobau;