The system adopts independent and distributed RS485 interface I/O module according to site requirement. In view of toilet safety and service consideration, it needs to dynamically display emergency button status on site and real-time on-site. SOYAL provides AR-401-IO-DI7RO of I/O board equipped with peripheral emergency button, flashing light to real-time report and display the status on site through 701ClientSQL Graphic Animation Control Software.