Safety pressure switch for carbon dioxide cooling device, has microcontrollers in combination with switching elements operated as pressure limiter and safety pressure limiter, respectively

摘要

The switch has two pressure measuring cells (1, 6) attached to microcontrollers (2, 7) according to a degree of protection international protection 65. The microcontrollers are connected with switching elements (3, 8), reset keys (4, 9), LED-displays (5, 10) and a universal serial buscontroller (12). The microcontrollers include a connector for connecting a personal computer and are connected to a power supply unit (11). The microcontrollers in combination with the switching elements are operated as a pressure limiter and a safety pressure limiter, respectively.