The compact MSI 400 safety controls evaluate the signals of a wide range of safety sensors and are used with small- to medium-sized machines for monitoring the safety circuit. With their configurable safety functions, they can very easily be adapted. The MSI-MD-FB muting interface controls the muting function for access guarding on conveyor lines. It is used in combination with the ELC and MLC safety light curtains as well as the MLD multiple light beam safety devices.