Count entrances, windows, corridors and rooms per security area and pick the VdS grade as the project setting — the calculator derives magnetic contacts and motion detectors, forms detection zones per area and device type, and shows how many zones and expansion modules the intruder-alarm control panel needs. The same building blocks as the PlanWerke planner, oriented on DIN VDE 0833-3. Free, no sign-up, entirely in the browser.
Measures from tables 1–8 of DIN VDE 0833-3 that no calculator can derive from counts — they explicitly belong to the specialist planning (listed in German, the canonical language of the standard extracts). Klassen A/B/C und Grade 1–4 sind laut VdS 2311 (4.1.2) nicht bzw. nur bedingt vergleichbar – die Grad-Zuordnung ist eine grobe Orientierung, kein Nachweis.
The calculator works with counts. In the PlanWerke viewer you plan the IAS on your real plan (PDF, DWG/DXF or IFC): detect doors and windows, magnetic contacts per leaf and motion detectors per room from the geometry, detection zones and security areas per storey — with the IAS planning package. The IAS module is in beta and free while it is.
The selected grade decides what is monitored: Home and class A protect the building envelope (magnetic contacts on entrances and windows) and the forced routes as trap protection; class B adds motion detectors in all rooms; class C also monitors internal openings. This is exactly the graduation the planner applies for the project setting “IAS per VdS, grade …”.
Detection zones are formed per security area and device type — contacts and motion detectors are never mixed and never span areas — so that a triggered zone stays locally identifiable. The device count per zone is a planning default you adapt to the manufacturer.
From the number of detection zones and the panel data (zones on the panel, zones per expansion module) follows how many expansion modules are needed — the system diagram shows panel, areas and zones at a glance.
Enough for a triggered zone to stay locally identifiable: a separate zone per security area (usually one storey) and per device type, limited to a practical number of devices per zone. The calculator forms the zones exactly like that and compares them with the zones of the control panel — if they do not suffice, it names the required expansion modules.
That follows from risk, security concept and the insurer's requirements — not from the technology. The grade is an input to the planning; it determines the minimum scope of surveillance measures. The calculator takes it as a project setting and shows the mapping to grades 1–4 of DIN VDE 0833-3 only as orientation, because according to VdS 2311 classes and grades are not directly comparable.
Because the calculator knows no geometry. In the planner, magnetic contacts per leaf follow from the opening width and motion detectors from room shape and range — the quick check uses one default per opening and room instead and states that openly as a simplification. For wide gates, multi-leaf windows and large halls the number in the planner is therefore higher.
Locking, penetration, reach-through and safe surveillance as well as glass-break, vibration or hold-up detectors — measures that cannot be derived from counts. They appear as named open points per grade so that they visibly land in the specialist planning instead of silently missing.
No. The result is a sizing aid oriented on DIN VDE 0833-3 based on the selected grade — a planning proposal for review by a qualified planner. Security concept, coordination with insurer and installer and the verification remain with the specialist planning; the IAS module in PlanWerke is also marked as beta.
No account required · runs entirely locally in your browser