diff --git a/CHANGELOG.md b/CHANGELOG.md
index a98adab..3c17790 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,20 @@ Alle Änderungen und Versionen des CPLv4.0 Frontends chronologisch dokumentiert.
 
 ---
 
+## [1.6.400] – 2025-05-13
+
+### Feature
+
+- In `_app.tsx` wurde ein zentrales Redux-Update-System implementiert:
+  - Die aktuelle Seite wird automatisch erkannt (`window.location.pathname`)
+  - Abhängig von der Seite werden die passenden Thunks geladen (z. B. `fetchKueDataThunk`, `fetchDigitalOutputsThunk` usw.)
+  - Die Daten werden alle 10 Sekunden erneut geladen
+  - Dadurch muss auf den Unterseiten kein separater Redux-Aufruf mehr erfolgen
+- Unterstützt alle Slices: digitale/analoge Ein- und Ausgänge, Meldungen, Systemstatus, Einstellungen, TDR/Loop-Daten
+- Reduziert Hardwarelast durch seitenbezogene API-Calls
+
+---
+
 ## [1.6.399] – 2025-05-12
 
 ### fix
diff --git a/config/webVersion.ts b/config/webVersion.ts
index d5cd292..5ccef1c 100644
--- a/config/webVersion.ts
+++ b/config/webVersion.ts
@@ -6,5 +6,5 @@
 2: Patch oder Hotfix (Bugfixes oder kleine Änderungen).
 
 */
-const webVersion = "1.6.399";
+const webVersion = "1.6.400";
 export default webVersion;
diff --git a/pages/_app.tsx b/pages/_app.tsx
index 90a7878..8c8efc3 100644
--- a/pages/_app.tsx
+++ b/pages/_app.tsx
@@ -4,14 +4,28 @@
 import { useEffect, useState } from "react";
 import { Provider } from "react-redux";
 import store, { useAppDispatch } from "../redux/store";
+import { AppProps } from "next/app";
 import { loadWindowVariables } from "../utils/loadWindowVariables";
+
 import Header from "../components/header/Header";
 import Navigation from "../components/navigation/Navigation";
 import Footer from "../components/footer/Footer";
-import { setKueData } from "../redux/slices/kueDataSlice";
+
+// Thunks importieren
+import { fetchKueDataThunk } from "../redux/thunks/fetchKueDataThunk";
+import { fetchDigitalOutputsThunk } from "../redux/thunks/fetchDigitalOutputsThunk";
+import { fetchAnalogeEingaengeThunk } from "../redux/thunks/fetchAnalogeEingaengeThunk";
+import { fetchAnalogInputsHistoryThunk } from "../redux/thunks/fetchAnalogInputsHistoryThunk";
+import { fetchLast20MessagesThunk } from "../redux/thunks/fetchLast20MessagesThunk";
+import { fetchOpcUaSettingsThunk } from "../redux/thunks/fetchOpcUaSettingsThunk";
+import { fetchSystemSettingsThunk } from "../redux/thunks/fetchSystemSettingsThunk";
+import { fetchSystemVoltTempThunk } from "../redux/thunks/fetchSystemVoltTempThunk";
+import { fetchReferenceCurveBySlotThunk } from "../redux/thunks/fetchReferenceCurveBySlotThunk";
+import { fetchAllTDRReferenceChartThunk } from "../redux/thunks/fetchAllTDRReferenceChartThunk";
+import { fetchTDRChartDataByIdThunk } from "../redux/thunks/fetchTDRChartDataByIdThunk";
+import { fetchLoopChartDataThunk } from "../redux/thunks/fetchLoopChartDataThunk";
 
 import "../styles/globals.css";
-import { AppProps } from "next/app";
 
 function MyApp({ Component, pageProps }: AppProps) {
   return (
@@ -27,32 +41,41 @@ function AppContent({ Component, pageProps }: AppProps) {
 
   useEffect(() => {
     let intervalId: NodeJS.Timeout;
+    const pathname = window.location.pathname;
 
-    const loadAndStoreVariables = async () => {
-      try {
-        const { variables, kueData } = await loadWindowVariables();
-        if (!variables) throw new Error("Sitzungsfehler");
-
-        // Nur auf kabelueberwachung.html Redux aktualisieren
-        if (window.location.pathname.includes("kabelueberwachung")) {
-          dispatch(setKueData(kueData));
-        }
-
-        setSessionExpired(false);
-      } catch (error) {
-        console.error("❌ Fehler beim Laden der Sitzung:", error);
-        setSessionExpired(true);
+    const loadAndDispatch = () => {
+      if (pathname.includes("kabelueberwachung")) {
+        dispatch(fetchKueDataThunk());
+      } else if (pathname.includes("digitalOutputs")) {
+        dispatch(fetchDigitalOutputsThunk());
+      } else if (pathname.includes("digitalInputs")) {
+        dispatch(fetchDigitalOutputsThunk()); // 🟠 evtl. anpassen
+      } else if (pathname.includes("analogeEingaenge")) {
+        dispatch(fetchAnalogeEingaengeThunk());
+      } else if (pathname.includes("analogHistory")) {
+        dispatch(fetchAnalogInputsHistoryThunk());
+      } else if (pathname.includes("dashboard")) {
+        dispatch(fetchLast20MessagesThunk());
+      } else if (pathname.includes("einstellungen")) {
+        dispatch(fetchOpcUaSettingsThunk());
+      } else if (pathname.includes("systemvolt")) {
+        dispatch(fetchSystemVoltTempThunk());
+      } else if (pathname.includes("system")) {
+        dispatch(fetchSystemSettingsThunk());
+      } else if (pathname.includes("tdrRef")) {
+        dispatch(fetchAllTDRReferenceChartThunk());
+      } else if (pathname.includes("tdrSlot")) {
+        dispatch(fetchReferenceCurveBySlotThunk());
+      } else if (pathname.includes("tdrId")) {
+        dispatch(fetchTDRChartDataByIdThunk());
+      } else if (pathname.includes("loopChart")) {
+        dispatch(fetchLoopChartDataThunk());
       }
     };
 
     if (typeof window !== "undefined") {
-      loadAndStoreVariables();
-
-      // Nur auf kabelueberwachung.html regelmäßig aktualisieren
-      if (window.location.pathname.includes("kabelueberwachung")) {
-        intervalId = setInterval(loadAndStoreVariables, 10000);
-      }
-
+      loadAndDispatch();
+      intervalId = setInterval(loadAndDispatch, 10000);
       return () => clearInterval(intervalId);
     }
   }, []);
diff --git a/redux/slices/slices.zip b/redux/slices/slices.zip
new file mode 100644
index 0000000..53eff6a
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diff --git a/redux/thunks/thunks.zip b/redux/thunks/thunks.zip
new file mode 100644
index 0000000..7755cc8
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