The STI 42998-0030 Relay Board Assembly 17766-0070 Industrial Control Module REV. B is a unit of industrial control module designed for electrical equipment and supplies in various industrial settings. Manufactured by STI, this relay board assembly is a reliable and efficient solution for controlling and managing electrical signals in a industrial control system. With its specific model number and revision, this module is compatible with a range of applications that require precise and dependable relay control.