Omron has introduced the G9SX-GS safety guard switching unit. External outputs enable status indication of two safety input devices, auxiliary outputs enable monitoring of safety inputs, safety outputs and errors, and detailed LED status indicators provide quick, easy system diagnosis. Additionally, logical AND con-n e ctions allow complicated applications in combination with other G9SX series units. Each unit supports auto-and manual-switching functions. Auto switching, for applications with co-ordinated operations, monitors the machine or robot and operator to ensure that the machine and operator do not enter the co-ordinated area at the same time. The manual switching function is for applications that require limited machine access for operations such as maintenance and cleaning.