PIC Input Vs Cable Length

[gadelhas]

Hi;

Please if possible give me your advice regarding the attached circuit.

It the schematic i have 1 type of circuit connected to one input of the PIC and another type of circuit connected to other input.
The final schematic is to make an alarm system.

My concern is how I should do to make the system more reliable in the inputs of the micro controller, because I can have PIR detectors at about 200 meters away and cable can be close to the electrical house system, which can cause all types of interferences.
As you can see, in the first input i only have a Pull-Up resistor and capacitor, in the second input, I also include a TVS and more caps and resistors?

What is the opinion of you guys regarding the type of circuit that I should put on the input of the PIC? Or, what you usually do in cases like this?

(Opto here is not an option, because i can just have a simple switch instead of a PIR )