So how can it determine threats and non threats?
Every approaching object with determined speed within 2 meter is a threat
Why Turkey Chose Ukraine's Zaslon APS To Protect Its Tanks
warriormaven.com
However, the nature of Zaslon makes it an ideal candidate for retrofitting to existing vehicles. Zaslon doesn’t require an additional turret-mounted radar module, and the Zaslon modules are typically placed on the hull rather than the turret, so additional strain on turret drive (as seen with Trophy on the M1 Abrams) is not imparted. Ukrainian sources also state that
Zaslon’s simple “detonate” nature is faster than directed active-protection systems like Trophy, as the “hard kill” countermeasure does not need to turn and aim at a target first.
Of course, Zaslon has the major drawback of being fatal to friendly infantry surrounding a tank, which can pose problems in situations where infantry and tanks work in close cooperation. The US has hesitated to field APS on most tanks for this reason, opting for directed systems. However, this “shotgun” lethality can be a benefit, and there are controls to extend and detonate Zaslon modules as a last-ditch anti-infantry weapon.