With reference to the actuator control system, what is the difference for the mounting on flat backplate, backplate with sunshade and cabinet?

The flat backplate is the standard installation type, where all the accessories are fully exposed to the atmosphere and directly accessible for the operator. The sunshade is installed for end destinations where the direct sun temperature is higher than the maximum allowed for electric/electronic components (solenoid valves, positioners, pressure switches, etc). A cabinet is foreseen whenever the customer asks for protection against unauthorized operation on the panel accessories.