ST G sensors with multitag function have an extension in the article code specifying the programming code for the actuators (-P1, -P2, -P3 etc.).
Device version -P1 for example is combined with two actuators and can therefore not only recognise the "guard closed" status through actuator 0 (in this case activating the OS safety outputs), but also "guard fully open" status, through actuator 1, which activates signalling output O3. By sending this information to the machine control logic you can eliminate uncertainties caused by incomplete guard opening, increasing the precision and intrinsic safety of the machine.
A sensor of version -P4 on the other hand, installed in combination with 4 actuators such as for example in a rotary table assembly station, receives a string of bits with the code to identify the actuator when the safety outputs OS are activated by one of the actuators. In this way you can know which is the active work station also in the machine start-up phase or after an unexpected blackout.
To be used in safety applications, all the actuators must be fixed immovably on the machine, and none of them can be used as a bypass to activate the device.