{"id":10162,"date":"2026-08-18T15:23:12","date_gmt":"2026-08-18T13:23:12","guid":{"rendered":"https:\/\/smartfabrik.de\/knx-system-extension\/"},"modified":"2026-08-23T10:12:04","modified_gmt":"2026-08-23T08:12:04","slug":"knx-system-extension","status":"publish","type":"page","link":"https:\/\/smartfabrik.de\/en\/knx-service\/knx-system-extension\/","title":{"rendered":"KNX System Extension: Capacity Check | smartfabrik"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-page\" data-elementor-id=\"10162\" class=\"elementor elementor-10162 elementor-10085\" data-elementor-post-type=\"page\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-sfsec0001 elementor-section-full_width elementor-section-height-default elementor-section-height-default\" data-id=\"sfsec0001\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-no\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-sfcol0001\" data-id=\"sfcol0001\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-sfwid0001 elementor-widget elementor-widget-html\" data-id=\"sfwid0001\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"html.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<style>.elementor-widget-html{font-family:'Lato','Segoe UI',system-ui,-apple-system,Arial,sans-serif}.elementor-widget-html *{font-family:inherit}<\/style><style>\r\n:root{--cyan:#00CCFF;--cyan-ink:#007FA3;--ink:#0C0E10;--text:#343434;--muted:#71787E;--line:#E3E8EC;--ground:#F4F7F9;--paper:#fff;--champ:#C9A96A}\r\n\/*ARABISCH*\/\r\n\/* Noto Sans Arabic, selbst gehostet, variabel. 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.gwgrid{grid-template-columns:1fr}}\r\n.sp .gwcell{padding:26px 24px;border-inline-start:1px solid var(--line);border-top:1px solid var(--line);transition:background .35s}\r\n.sp .gwgrid .gwcell:nth-child(-n+4){border-top:none}\r\n.sp .gwgrid .gwcell:nth-child(4n+1){border-inline-start:none}\r\n@media(max-width:1000px){.sp .gwgrid .gwcell:nth-child(-n+4){border-top:1px solid var(--line)}.sp .gwgrid .gwcell:nth-child(-n+2){border-top:none}.sp .gwgrid .gwcell:nth-child(4n+1){border-inline-start:1px solid var(--line)}.sp .gwgrid .gwcell:nth-child(odd){border-inline-start:none}}\r\n@media(max-width:600px){.sp .gwgrid .gwcell{border-inline-start:none !important;border-top:1px solid var(--line) !important}.sp .gwgrid .gwcell:first-child{border-top:none !important}}\r\n@media(hover:hover){.sp .gwgrid:hover .gwcell:not(:hover){opacity:.5}.sp .gwcell:hover{background:linear-gradient(180deg,#F7FCFE,#fff 55%)}}\r\n.sp .gwnum{display:block;font-weight:800;font-size:11.5px;letter-spacing:.16em;color:#B7C0C7;margin-bottom:10px}\r\n.sp .gwcell h3{font-weight:900;font-size:16px;margin-bottom:8px;letter-spacing:-.01em}\r\n.sp .gwcell p{font-size:13.5px;color:var(--muted);line-height:1.6;margin:0}\r\n.sp .gwclose{margin-top:30px;text-align:center;font-size:17px;color:var(--text);max-width:74ch;margin-inline-start:auto;margin-inline-end:auto}\r\n.sp .gwclose strong{color:var(--ink);font-weight:900}\r\n\/* orte *\/\r\n.sp .orte{background:var(--ground);border-top:1px solid var(--line);padding:64px 0}\r\n.sp .orte.onpaper{background:var(--paper)}\r\n.sp .ochips{display:flex;flex-wrap:wrap;gap:10px;margin-top:6px}\r\n.sp .ochips a{font-weight:800;font-size:13px;color:var(--ink);background:var(--paper);border:1px solid var(--line);border-radius:999px;padding:9px 17px;text-decoration:none;transition:border-color .2s,transform .15s,color .2s}\r\n.sp .orte.onpaper .ochips a{background:var(--ground)}\r\n.sp .ochips a:hover{border-color:var(--cyan);color:var(--cyan-ink);transform:translateY(-1px)}\r\n\/* faq + cta *\/\r\n.sp .faq{padding:80px 0}\r\n\/*PREMIUM*\/\r\n\/* 28 gestapelte Kacheln waren die gr\u00f6\u00dfte Fl\u00e4che der Seite. Haarlinien wie \u00fcberall sonst. *\/\r\n.sp details{border:0;border-bottom:1px solid var(--line);border-radius:0;margin:0;background:none;overflow:visible}\r\n.sp .faq details:first-of-type{border-top:1px solid var(--line)}\r\n\/* Die Innenabst\u00e4nde stehen weiter unten als Kurzform und w\u00fcrden Einzelwerte hier wieder\r\n   \u00fcberschreiben \u2014 deshalb sind sie dort ge\u00e4ndert, nicht hier. *\/\r\n@media(max-width:640px){.sp details p{padding-inline-end:0}}\r\n.sp summary{cursor:pointer;font-weight:800;font-size:15.5px;color:var(--ink);padding:19px 4px 19px 0;list-style:none;display:flex;justify-content:space-between;align-items:center;gap:14px}\r\n.sp summary::-webkit-details-marker{display:none}\r\n.sp summary::after{content:\"+\";font-weight:900;font-size:20px;color:var(--cyan-ink);transition:transform .2s}\r\n.sp details[open] summary::after{transform:rotate(45deg)}\r\n.sp details p{padding:0 44px 22px 0;margin:0;font-size:15px;color:var(--muted);line-height:1.65;max-width:80ch}\r\n.sp .cta{background:radial-gradient(120% 130% at 50% 0%,#17212b,#0a0e12 70%);color:#fff;text-align:center;padding:80px 0;border-top:1px solid rgba(255,255,255,.07)}\r\n.sp .cta .eyebrow{color:var(--champ)}.sp .cta .eyebrow::before{background:var(--champ)}\r\n.sp .cta h2{color:#fff;font-weight:900;font-size:clamp(26px,3.8vw,40px);margin-top:14px}\r\n.sp .cta p{color:rgba(255,255,255,.72);max-width:58ch;margin:14px auto 0}\r\n.sp .cta .btn{margin-top:28px}\r\n.sp .reveal{opacity:0;transform:translateY(18px);transition:opacity .7s,transform .7s}.sp .reveal.in{opacity:1;transform:none}\r\n@media(prefers-reduced-motion:reduce){.sp .reveal{opacity:1;transform:none;transition:none}}\r\n.blpnav{position:sticky;top:0;z-index:60;background:rgba(255,255,255,.92);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid #E3E8EC;font-family:'Lato',system-ui,sans-serif}\r\n.blpnav .nwrap{max-width:1180px;margin:0 auto;padding:0 32px;display:flex;align-items:center;justify-content:space-between;height:74px;gap:20px}\r\n.blpnav .blogo{background-image:url(\"\/wp-content\/uploads\/sf\/db0cb34024.svg\");background-repeat:no-repeat;background-position:left center;background-size:contain;display:inline-block;;width:168px;height:34px;background-repeat:no-repeat;background-size:contain;background-position:left center;display:block;flex:none}\r\n.blpnav .blogo-t,.blpfoot .blogo-t{font-weight:900;font-size:20px;color:#0C0E10;text-decoration:none}\r\n.blpnav .bmenu{display:flex;gap:26px;list-style:none;margin:0;padding:0}\r\n.blpnav .bmenu a{color:#0C0E10;text-decoration:none;font-weight:700;font-size:14.5px}\r\n.blpnav .bmenu a:hover{color:#007FA3}\r\n\/*KOPF-FIX*\/.blpnav .nwrap{gap:18px}.blpnav .bmenu{gap:24px;flex-wrap:nowrap}.blpnav .bmenu a{white-space:nowrap}.blpnav .bmenu li{flex:none}.blpnav .sflang{flex:none;margin-inline-start:4px;padding-inline-start:18px;border-inline-start:1px solid rgba(12,14,16,.12)}@media(max-width:1120px){.blpnav .bmenu{gap:16px}.blpnav .bmenu a{font-size:13.5px}}@media(max-width:980px){.blpnav .bmenu{gap:12px}.blpnav .bmenu a{font-size:13px}}\/*KOPF-FIX-ENDE*\/.blpnav .bnav-cta{flex:none;background:#00CCFF;color:#00252F;font-weight:800;font-size:13.5px;text-decoration:none;border-radius:999px;padding:11px 20px}\r\n.blpnav input.sfnav-cb,.nav input.sfnav-cb{position:absolute;width:1px;height:1px;opacity:0;margin:0;padding:0;border:0;clip-path:inset(50%);overflow:hidden;appearance:none;-webkit-appearance:none}.blpnav .sfnav-burger,.nav .sfnav-burger{display:none;cursor:pointer;width:26px;height:20px;position:relative;flex:0 0 auto;padding:0;vertical-align:baseline;font-size:inherit}.blpnav .sfnav-burger span,.nav .sfnav-burger span,.blpnav .sfnav-burger span::before,.nav .sfnav-burger span::before,.blpnav .sfnav-burger span::after,.nav .sfnav-burger span::after{content:\"\";position:absolute;left:0;width:26px;height:2px;background:currentColor;border-radius:2px;transition:transform .2s,opacity .2s}.blpnav .sfnav-burger span,.nav .sfnav-burger span{top:9px}.blpnav .sfnav-burger span::before,.nav .sfnav-burger span::before{top:-8px}.blpnav .sfnav-burger span::after,.nav .sfnav-burger span::after{top:8px}.blpnav .sfnav-cb:checked+.sfnav-burger span,.nav .sfnav-cb:checked+.sfnav-burger span{background:transparent}.blpnav .sfnav-cb:checked+.sfnav-burger span::before,.nav .sfnav-cb:checked+.sfnav-burger span::before{transform:translateY(8px) rotate(45deg)}.blpnav .sfnav-cb:checked+.sfnav-burger span::after,.nav .sfnav-cb:checked+.sfnav-burger span::after{transform:translateY(-8px) rotate(-45deg)}.blpnav .sfnav-cb:focus-visible+.sfnav-burger,.nav .sfnav-cb:focus-visible+.sfnav-burger{outline:2px solid currentColor;outline-offset:6px}@media(max-width:840px){.blpnav .nwrap{flex-wrap:wrap;height:auto;padding-top:12px;padding-bottom:10px;row-gap:0}.blpnav .sfnav-burger{display:block;order:2;margin-inline-start:auto}.blpnav .bmenu{display:none;order:4;width:100%;flex-direction:column;gap:0;padding:10px 0 2px;border-top:1px solid rgba(12,14,16,.1);margin-top:10px}.blpnav .sfnav-cb:checked~.bmenu{display:flex}.blpnav .bmenu li{width:100%}.blpnav .bmenu a{display:block;padding:11px 0;font-size:15px}.blpnav .bmenu li+li a{border-top:1px solid rgba(12,14,16,.07)}.blpnav .sflang{order:3}}@media(max-width:560px){.blpnav .bnav-cta{padding:9px 14px;font-size:12.5px}}\r\n.blpfoot{background:#0C0E10;color:rgba(255,255,255,.7);font-family:'Lato',system-ui,sans-serif;padding:54px 0 30px}\r\n.blpfoot .wrap{max-width:1180px;margin:0 auto;padding:0 32px}\r\n.blpfoot .ftop{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:30px;padding-bottom:30px;border-bottom:1px solid rgba(255,255,255,.12)}\r\n.blpfoot .fregion{font-size:13px;color:rgba(255,255,255,.45);margin-top:4px}\r\n.blpfoot .fregionen{display:flex;flex-wrap:wrap;align-items:center;gap:16px;padding:18px 0;border-bottom:1px solid rgba(255,255,255,.12);font-size:13.5px}\r\n.blpfoot .fregionen span{color:rgba(255,255,255,.45);font-weight:800;letter-spacing:.06em;text-transform:uppercase;font-size:11.5px}\r\n@media(max-width:980px){.blpfoot .ftop{grid-template-columns:1fr 1fr}}\r\n@media(max-width:760px){.blpfoot .ftop{grid-template-columns:1fr;gap:24px}}\r\n.blpfoot .blogo{background-image:url(\"\/wp-content\/uploads\/sf\/db0cb34024.svg\");background-repeat:no-repeat;background-position:left center;background-size:contain;display:inline-block;;width:168px;height:34px;background-repeat:no-repeat;background-size:contain;background-position:left center;display:block}\r\n.blpfoot .fbrand p{font-size:13.5px;margin:16px 0 0;max-width:46ch;line-height:1.6}\r\n.blpfoot .fcol{display:flex;flex-direction:column;gap:11px}\r\n.blpfoot .fh{font-size:12px;font-weight:800;letter-spacing:.12em;text-transform:uppercase;color:rgba(255,255,255,.45)}\r\n.blpfoot a{color:rgba(255,255,255,.72);text-decoration:none;font-size:14px}.blpfoot a:hover{color:#40d0ff}\r\n.blpfoot .fbot{display:flex;justify-content:space-between;align-items:center;padding-top:22px;font-size:12.5px;color:rgba(255,255,255,.5)}\r\n.blpfoot .fbot nav{display:flex;gap:18px}\r\n<\/style><style>\/*PREMIUM*\/\r\n.sp .sband{background:radial-gradient(130% 120% at 50% -10%,#18222c,#0a0e12 70%);padding:62px 0}\r\n.sp .sband .prmedia{grid-template-columns:1.4fr 1fr}\r\n@media(max-width:700px){.sp .sband .prmedia{grid-template-columns:1fr}.sp .sband .prmedia figure.tall{grid-row:auto}}\r\n\/* .sympt hat nur im CSS der \u00dcbersichtsseite Abstand. Auf den vier Silo-Seiten klebte\r\n   \u201eDie Ausgangslage\" ohne Luft direkt unter dem Hero. *\/\r\n.sp .sympt{padding:74px 0 0}\/*SILO-KOSTEN*\/\r\n.sp .skost{background:var(--paper);padding:72px 0;border-top:1px solid var(--line)}\r\n.sp .skgrid{display:grid;grid-template-columns:repeat(3,1fr);gap:0;margin-top:32px;border-top:1px solid var(--line)}\r\n@media(max-width:820px){.sp .skgrid{grid-template-columns:1fr}}\r\n.sp .skz{padding:26px 30px 26px 0}\r\n.sp .skz+.skz{border-inline-start:1px solid var(--line);padding-inline-start:30px}\r\n@media(max-width:820px){.sp .skz+.skz{border-inline-start:0;padding-inline-start:0;border-top:1px solid var(--line)}}\r\n.sp .skz strong{display:block;font-size:clamp(22px,2.6vw,30px);font-weight:900;color:var(--ink);letter-spacing:-.02em}\r\n.sp .skz>span{display:block;margin-top:5px;font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--cyan-ink);font-weight:800}\r\n.sp .skz p{margin-top:12px;font-size:14.5px;line-height:1.68;color:var(--text)}\r\n.sp .sbeweis{background:var(--paper);padding:74px 0;border-top:1px solid var(--line)}\r\n.sp .sbwbild{margin:32px 0 0}\r\n.sp .sbwbild img{width:100%;height:auto;display:block}\r\n.sp .sbwhin{margin-top:26px;font-size:15.5px;line-height:1.72;color:var(--text);max-width:78ch}\r\n.sp .adhero{position:relative;color:#fff;background:radial-gradient(125% 120% at 50% -10%,#18222c,#0a0e12 66%);padding:84px 0 74px;border-bottom:1px solid rgba(255,255,255,.07)}\r\n.sp .adhero .eyebrow{color:#C9A96A}.sp .adhero .eyebrow::before{background:#C9A96A}\r\n.sp .adhero h1{color:#fff;font-weight:900;font-size:clamp(31px,4.9vw,52px);margin-top:18px;max-width:19ch;letter-spacing:-.028em;line-height:1.08}\r\n.sp .adhero h1 span{color:#40d0ff}\r\n.sp .adhero p.lead{font-size:19px;color:rgba(255,255,255,.76);max-width:64ch;margin-top:18px}\r\n.sp .adbul{display:grid;grid-template-columns:1fr 1fr;gap:10px 30px;margin:30px 0 0;padding:0;list-style:none;max-width:74ch}\r\n@media(max-width:680px){.sp .adbul{grid-template-columns:1fr}}\r\n.sp .adbul li{position:relative;padding-inline-start:26px;font-size:15px;color:rgba(255,255,255,.86);font-weight:700}\r\n.sp .adbul li::before{content:\"\";position:absolute;inset-inline-start:0;top:9px;width:12px;height:2px;background:#00CCFF}\r\n.sp .adcta{display:inline-flex;align-items:center;gap:9px;margin-top:32px;font-weight:800;font-size:15px;color:#00252F;background:#00CCFF;border-radius:999px;padding:15px 28px;text-decoration:none;transition:transform .15s,box-shadow .2s}\r\n.sp .adcta:hover{transform:translateY(-2px);box-shadow:0 16px 34px -12px rgba(0,204,255,.5)}\r\n.sp .symg{display:grid;grid-template-columns:repeat(3,1fr);gap:0;border-top:1px solid var(--line)}\r\n@media(max-width:860px){.sp .symg{grid-template-columns:1fr}}\r\n.sp .symc{padding:32px 30px 30px;border-inline-start:1px solid var(--line)}\r\n.sp .symc:first-child{border-inline-start:0}\r\n.sp .symc h3{font-weight:900;font-size:18px;letter-spacing:-.02em;margin:0 0 10px}\r\n.sp .symc p{font-size:14.5px;color:var(--muted);margin:0;line-height:1.62}\r\n.sp .backpill{display:inline-flex;align-items:center;gap:9px;font-weight:800;font-size:14px;color:var(--cyan-ink);text-decoration:none;border:1px solid var(--line);border-radius:999px;padding:11px 20px;background:var(--paper);transition:border-color .2s,transform .2s}\r\n.sp .backpill:hover{border-color:var(--cyan);transform:translateX(3px)}\r\n.sp .pnote{margin:26px 0 0;font-size:15px;color:var(--muted);border-inline-start:2px solid var(--cyan);padding-inline-start:18px;max-width:76ch}\r\n\/* Die angrenzenden Faelle. Bewusst Fliesstext und keine Linkliste: wer hier landet, hat eine\r\n   Lage, keine Navigationsabsicht. Ein Satz, der die Nachbarlage benennt, hilft ihm \u2014 eine\r\n   Aufzaehlung von Seitentiteln nicht. *\/\r\n.sp .nachbarn{margin:22px 0 0;font-size:15px;line-height:1.72;color:var(--text);max-width:76ch;padding-top:20px;border-top:1px solid var(--line)}\r\n.sp .nachbarn b{font-weight:800;color:var(--ink)}\r\n.sp .nachbarn a{color:var(--cyan-ink);font-weight:700;text-decoration:underline;text-underline-offset:2px;text-decoration-thickness:1px}\r\n.sp .nachbarn a:hover{text-decoration-thickness:2px}\r\n<\/style><style>.sp .symg.vier{grid-template-columns:repeat(4,1fr)}@media(max-width:1100px){.sp .symg.vier{grid-template-columns:1fr 1fr}}@media(max-width:860px){.sp .symg.vier{grid-template-columns:1fr}}<\/style><style>\/*REKF*\/\/*REKF2*\/\r\n\r\n\/* Anfrage als Gespr\u00e4ch, nicht als Formular. Kein Radius, kein Rahmen, kein Schatten \u2014\r\n   dieselbe Sprache wie die \u00fcbrigen Abschnitte. *\/\r\n.sp .rform{background:var(--ground);padding:86px 0;border-top:1px solid var(--line);scroll-margin-top:96px}\r\n.sp .del+.rform{border-top:0}\r\n.sp .rfgrid{display:grid;grid-template-columns:.82fr 1.18fr;gap:0;align-items:start}\r\n@media(max-width:900px){.sp .rfgrid{grid-template-columns:1fr}}\r\n.sp .rfintro{padding:4px 54px 0 0}\r\n@media(max-width:900px){.sp .rfintro{padding:0 0 36px}}\r\n.sp .rfintro h2{font-weight:900;font-size:clamp(27px,3.6vw,40px);letter-spacing:-.03em;line-height:1.08;margin:14px 0 0;max-width:19ch;text-wrap:balance}\r\n.sp .rfintro>p{margin:16px 0 0;font-size:16.5px;line-height:1.7;color:var(--text);max-width:46ch}\r\n.sp .rfweg{list-style:none;margin:34px 0 0;padding:0;border-top:1px solid var(--line)}\r\n.sp .rfweg li{display:grid;grid-template-columns:30px 1fr;gap:14px;padding:15px 0;border-bottom:1px solid 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.rfform::before{content:\"\";position:absolute;inset-inline-start:0;top:0;bottom:0;width:2px;\r\n  background:linear-gradient(180deg,var(--cyan) 0 96px,var(--line) 96px)}\r\n@media(max-width:900px){.sp .rfform{padding:32px 28px 34px}}\r\n@media(max-width:520px){.sp .rfform{padding:28px 22px 32px}}\r\n.sp .rfhead{margin:0 0 22px;font-weight:800;font-size:11px;letter-spacing:.2em;text-transform:uppercase;color:var(--muted)}\r\n.sp .rfq{border-top:1px solid var(--line);padding:26px 0 8px}\r\n.sp .rfq:last-of-type{padding-bottom:2px}\r\n.sp .rfqn{display:block;font-weight:800;font-size:11px;letter-spacing:.18em;color:var(--cyan-ink)}\r\n.sp .rfql{font-weight:900;font-size:19px;letter-spacing:-.02em;line-height:1.24;color:var(--ink);margin:9px 0 0;max-width:34ch}\r\n.sp .rfwhy{margin:9px 0 0;font-size:14px;line-height:1.62;color:var(--text);max-width:54ch}\r\n.sp .rffields{display:grid;gap:20px;margin-top:22px}\r\n.sp .rfrow{display:grid;grid-template-columns:1fr 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Skript angefasst wird. *\/\r\n.sp .rfmsg.ok{margin-top:22px;padding-inline-start:18px;border-inline-start:2px solid var(--cyan);\r\n  font-size:17px;font-weight:800;line-height:1.6;color:var(--ink)}\r\n\r\n\/* Silo-Kacheln *\/\r\n.sp .silogrid{display:grid;grid-template-columns:1fr 1fr;gap:0;background:var(--paper);border:1px solid rgba(12,14,16,.1);border-radius:6px;overflow:hidden;box-shadow:0 1px 0 rgba(12,14,16,.05),0 26px 52px -38px rgba(12,14,16,.28)}\r\n@media(max-width:760px){.sp .silogrid{grid-template-columns:1fr}}\r\n.sp .silocell{position:relative;display:block;padding:32px 30px 28px;border-inline-start:1px solid var(--line);border-top:1px solid var(--line);text-decoration:none;color:inherit;transition:background .3s}\r\n.sp .silocell:hover{background:#F4FBFE}\r\n.sp .silonum{font-weight:900;font-size:12px;letter-spacing:.14em;color:var(--cyan-ink)}\r\n.sp .silocell h3{font-weight:900;font-size:19px;letter-spacing:-.02em;margin:10px 0 9px;color:var(--ink)}\r\n.sp .silocell p{font-size:14.5px;color:var(--muted);margin:0 0 16px;line-height:1.62}\r\n.sp .siloar{display:inline-flex;align-items:center;gap:8px;font-weight:800;font-size:13.5px;color:var(--cyan-ink)}\r\n.sp .silocell:hover .siloar .ar{transform:translateX(4px)}\r\n.sp .siloar .ar{transition:transform .2s}\r\n.sp .backpill{display:inline-flex;align-items:center;gap:9px;font-weight:800;font-size:14px;color:var(--cyan-ink);text-decoration:none;border:1px solid var(--line);border-radius:999px;padding:11px 20px;background:var(--paper);transition:border-color .2s,transform .2s}\r\n.sp .backpill:hover{border-color:var(--cyan);transform:translateX(3px)}\r\n.sp .pnote{margin:26px 0 0;font-size:15px;color:var(--muted);border-inline-start:2px solid var(--cyan);padding-inline-start:18px;max-width:76ch}\r\n\n.sflang{display:flex;align-items:center;gap:9px;flex:none;font-size:12px;font-weight:800;letter-spacing:.09em;font-family:'Lato',system-ui,sans-serif}\n.sflang a{color:#8A949B;text-decoration:none}\n.sflang a:hover{color:#007FA3}\n.sflang .on{color:currentColor;opacity:.95}\n@media(max-width:560px){.sflang{gap:6px;font-size:11px;letter-spacing:.06em;margin-inline-start:0;padding-inline-start:10px}}\n<\/style><header class=\"blpnav\" data-sf-lang=\"en\"><div class=\"nwrap\"><a href=\"\/en\/\" class=\"blogo\" aria-label=\"smartfabrik\"><\/a><input type=\"checkbox\" id=\"sfnav\" class=\"sfnav-cb\" aria-label=\"Open menu\"><label for=\"sfnav\" class=\"sfnav-burger\" aria-hidden=\"true\"><span><\/span><\/label><ul class=\"bmenu\"><li><a href=\"\/en\/services\/\">Services<\/a><\/li><li><a href=\"\/en\/knx-service\/\">KNX service<\/a><\/li><li><a href=\"\/en\/projects\/\">Projects<\/a><\/li><li><a href=\"\/en\/partners\/\">Partners<\/a><\/li><li><a href=\"\/en\/team\/\">Team<\/a><\/li><li><a href=\"\/en\/contact\/\">Contact<\/a><\/li><\/ul><div class=\"sflang\"><a href=\"\/knx-anlage-erweitern-vorschau\/\" lang=\"de\">DE<\/a><span class=\"on\">EN<\/span><a href=\"\/ar\/\u062a\u0648\u0633\u064a\u0639-\u0645\u0646\u0634\u0623\u0629-knx\/\" lang=\"ar\">AR<\/a><\/div><a class=\"bnav-cta\" href=\"\/en\/contact\/\">Talk to us <span class=\"ar\">&rarr;<\/span><\/a><\/div><\/header><div class=\"sp\" data-sf-lang=\"en\">\r\n<section class=\"adhero\"><div class=\"wrap\">\r\n  <span class=\"eyebrow\">Extending an existing system<\/span>\r\n  <h1>Extending a KNX system \u2014 <span>first check what the bus can take.<\/span><\/h1>\r\n  <p class=\"lead\">The system has been running for years, the ETS project is at hand \u2014 and now something is to be added: a building extension, a converted attic, the outdoor area, a heat pump. Whether this becomes an extension or a rebuild of the topology is decided not by the new device but by the system beneath it. We check what reserves it has today and plan the extension within the existing project.<\/p>\r\n  <ul class=\"adbul\"><li>Capacity checked before anything is added<\/li><li>Extension within the existing ETS project, not alongside it<\/li><li>Heat pump, photovoltaics, storage and wallbox connected<\/li><li>Even \u201cno longer enough\u201d is a result<\/li><\/ul>\r\n  <a class=\"adcta\" href=\"#anfrage\">Have the capacity checked <span class=\"ar\">&rarr;<\/span><\/a>\r\n<\/div><\/section>\r\n\r\n<section class=\"sympt\"><div class=\"wrap\">\r\n  <div class=\"sec-h\"><span class=\"eyebrow\">The starting point<\/span><h2>Four scenarios, the same first question.<\/h2><\/div>\r\n  <div class=\"symg vier\"><div class=\"symc reveal\"><h3>Rooms are added<\/h3><p>A building extension, an added storey, a converted attic: lighting, shading and heating there should run just as they do in the rest of the house. Whether that is straightforward is decided by the line the new part is to join \u2014 whether it can still accept devices and how far the existing cable reaches.<\/p><\/div><div class=\"symc reveal\"><h3>Energy systems move in<\/h3><p>Heat pump, photovoltaics, storage, wallbox \u2014 four devices with their own control logic that work individually and only play together once they know about each other. The existing KNX system can provide that link; whether it does depends on the devices' interfaces and on the data points they expose.<\/p><\/div><div class=\"symc reveal\"><h3>Outdoor areas are added<\/h3><p>A carport with a charging point, garden lighting, a gate, a pool: outdoors, everything runs off a single bus cable that leads out of the building. That includes surge protection for this cable, the clearance from the 230-volt lines and the requirements for outdoor devices \u2014 questions that belong at the start of the planning.<\/p><\/div><div class=\"symc reveal\"><h3>A space changes use<\/h3><p>The guest room becomes an office, one unit becomes two, a tenant moves in and needs a zone of their own. The devices stay, the requirement changes: different assignments, different time programmes, different reporting. With a complete project this can be planned \u2014 what remains open is whether the structure supports a further zone.<\/p><\/div><\/div>\r\n<\/div><\/section>\r\n\r\n<section class=\"gew\"><div class=\"wrap\">\r\n  <div class=\"sec-h\"><span class=\"eyebrow\">Our approach<\/span><h2>What we check before anything is added.<\/h2><\/div>\r\n  <div class=\"gwgrid\"><div class=\"gwcell reveal\"><span class=\"gwnum\">01<\/span><h3>Lines and bus current<\/h3><p>How many devices sit on one segment, how much bus current the KNX power supply delivers, and how high the telegram load is over a longer period \u2014 what counts is not the instantaneous value but the peaks, when central commands or shading runs trigger everything at once.<\/p><\/div><div class=\"gwcell reveal\"><span class=\"gwnum\">02<\/span><h3>Addresses and structure<\/h3><p>What is scarce is not the group addresses but the individual ones: they are limited per segment. If a line coupler is added, the addresses behind it change; the affected devices are re-addressed and reloaded. Older line couplers filter only main groups 0 to 13 \u2014 that sets the direction for the addressing scheme.<\/p><\/div><div class=\"gwcell reveal\"><span class=\"gwnum\">03<\/span><h3>Reserves in the hardware<\/h3><p>The limits are set by the hardware rather than the project: whether the actuator still has a free channel, whether the cable runs to the desired spot, how heavily the KNX power supply is loaded. Plus free module widths and terminals in the distribution board. It is opened by our own electricians from elektrofabrik or by your contractor \u2014 we take a look with them.<\/p><\/div><div class=\"gwcell reveal\"><span class=\"gwnum\">04<\/span><h3>Connecting energy systems<\/h3><p>Heat pump, inverter, storage and charging point bring different routes with them: volt-free SG-Ready contacts via a KNX switching actuator, Modbus RTU or TCP via a gateway, EEBus, more rarely a manufacturer's own KNX module. Which data points a device reads and writes is stated in its data point list \u2014 the route determines the scope.<\/p><\/div><div class=\"gwcell reveal\"><span class=\"gwnum\">05<\/span><h3>Load management and priorities<\/h3><p>KNX coordinates, it does not control everything: the surplus is usually distributed by the inverter's energy manager, the hard limit at the house connection is enforced by the fuse protection, and grid-oriented control under \u00a7 14a EnWG runs via the grid operator's control unit. What sits on the bus: enable signals, priorities, time windows and the display.<\/p><\/div><div class=\"gwcell reveal\"><span class=\"gwnum\">06<\/span><h3>When the reserves are not enough<\/h3><p>If the segment is at its device limit or the KNX power supply is exhausted, hardware is added: a further segment via a line repeater or an additional line, each with its own power supply \u2014 planned by us, installed by elektrofabrik or your contractor. That is a rebuild rather than an add-on, and we say so as soon as we see it.<\/p><\/div><\/div>\r\n  <p class=\"pnote\">In commercial properties too: tenant fit-outs and additional zones are created in the KNX project itself \u2014 with their own segment, line coupler and power supply \u2014 while the connection to a building management system runs via a gateway, usually on BACnet, and the question there is which data points the system offers at all: functions that are currently parameterised only locally in the device first need a group address and a download.<\/p>\r\n  <p class=\"nachbarn\"><b>Related situations.<\/b> If the project file is missing, it starts one step earlier with the <a href=\"\/en\/knx-system-readout\/\">system readout<\/a> \u2014 without it, any statement about capacity is guesswork. If it is no longer clear who looks after the system at all, the <a href=\"\/en\/knx-integrator-takeover\/\">takeover<\/a> comes first. And if nothing is to be added but something existing replaced, that is not an extension but a <a href=\"\/en\/knx-system-modernisation\/\">modernisation<\/a>. And if no bus cable reaches the place you have in mind, it works <a href=\"\/en\/knx-rf-wireless\/\">wirelessly within the same standard<\/a>.<\/p>\r\n<\/div><\/section>\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n<section class=\"rform\" id=\"anfrage\"><div class=\"wrap\"><div class=\"rfgrid\">\r\n  <div class=\"rfintro\">\r\n    <span class=\"eyebrow\">Before the decision<\/span>\r\n    <h2>Check first, then plan.<\/h2>\r\n    <p>Whether your system supports the new plans is decided by lines, addresses and reserves &mdash; not by the new device. Four questions, then we sort it out together.<\/p>\r\n    <ol class=\"rfweg\">\r\n      <li><span class=\"rfwn\">01<\/span><div><strong>We read your answers<\/strong> and get back to you &mdash; usually on the same working day.<\/div><\/li>\r\n      <li><span class=\"rfwn\">02<\/span><div><strong>Ten minutes on the phone<\/strong>, in which we sort out what exists and what is missing. A photo of the distribution board helps, but is not a requirement.<\/div><\/li>\r\n      <li><span class=\"rfwn\">03<\/span><div><strong>Then a written assessment<\/strong> with an effort range. Only then do you decide.<\/div><\/li>\r\n    <\/ol>\r\n    <p class=\"rfoffen\">Even \"in your case this is not worth doing\" is a result we will tell you. Both cost you nothing.<\/p>\r\n    <a class=\"rftel\" href=\"tel:+4921183866870\"><span>Rather talk straight away<\/span><strong>+49 211 838 66 870<\/strong><\/a>\r\n  <\/div>\r\n  <form class=\"rfform\" id=\"rf\" data-sf-form=\"knx-anlage-erweitern\">\r\n    <p class=\"rfhead\">Notes for the call<\/p>\r\n    <div class=\"rfq\">\r\n      <span class=\"rfqn\">01<\/span>\r\n      <h3 class=\"rfql\">What is your name, and how can we reach you?<\/h3>\r\n      <p class=\"rfwhy\">We need the email for the written assessment. A number only if you would prefer a callback.<\/p>\r\n      <div class=\"rffields\">\r\n        <div class=\"rfrow\">\r\n          <label>Name<input type=\"text\" id=\"rf-name\" name=\"name\" required autocomplete=\"name\" placeholder=\"First and last name\"><\/label>\r\n          <label>Email<input type=\"email\" id=\"rf-mail\" name=\"mail\" required autocomplete=\"email\" placeholder=\"name@example.com\"><\/label>\r\n        <\/div>\r\n        <div class=\"rfrow\">\r\n          <label>Telephone <span class=\"opt\">optional<\/span><input type=\"tel\" id=\"rf-tel\" name=\"tel\" autocomplete=\"tel\" placeholder=\"with dialling code\"><\/label>\r\n          <label>Company <span class=\"opt\">optional<\/span><input type=\"text\" id=\"rf-firma\" name=\"firma\" autocomplete=\"organization\" placeholder=\"if this is for business\"><\/label>\r\n        <\/div>\r\n      <\/div>\r\n    <\/div>\r\n    <div class=\"rfq\">\r\n      <span class=\"rfqn\">02<\/span>\r\n      <h3 class=\"rfql\">Which property is this about, and where is it?<\/h3>\r\n      <p class=\"rfwhy\">In the Rhineland we come round. If the property is further away, we start with a remote diagnosis before anyone travels.<\/p>\r\n      <div class=\"rffields\">\r\n        <div class=\"rfrow\">\r\n          <label class=\"rfsel\">Property type<select id=\"rf-art\" name=\"art\">\r\n            <option>House \/ villa<\/option><option>Apartment \/ penthouse<\/option><option>Holiday property abroad<\/option>\r\n            <option>Office building<\/option><option>Logistics hall \/ industrial<\/option><option>Hotel \/ hospitality<\/option><option>Something else<\/option>\r\n          <\/select><\/label>\r\n          <label>Location<input type=\"text\" id=\"rf-ort\" name=\"ort\" placeholder=\"Town or country\"><\/label>\r\n        <\/div>\r\n      <\/div>\r\n    <\/div>\r\n    <div class=\"rfq\">\r\n      <span class=\"rfqn\">03<\/span>\r\n      <h3 class=\"rfql\">Is there an ETS project file?<\/h3>\r\n      <p class=\"rfwhy\">\"I don't know\" is the most common answer here and perfectly fine &mdash; the question only decides where we start.<\/p>\r\n      <div class=\"rffields\">\r\n        <label class=\"rfsel\">Your best guess<select id=\"rf-datei\" name=\"datei\">\r\n          <option>I don't know<\/option><option>No, it's lost<\/option>\r\n          <option>Present, but outdated<\/option><option>Present, but password-protected<\/option>\r\n        <\/select><\/label>\r\n        <details>\r\n          <summary>How do I tell whether the file even exists?<\/summary>\r\n          <p>It ends in <em>.knxproj<\/em> and usually sits in the electrical contractor's handover folder, on a USB stick or as an email attachment. If nothing turns up, that is the normal case with houses that have changed hands &mdash; we then work with what the system itself yields. A photo of the distribution board helps us; please have the cover opened only by a qualified electrician.<\/p>\r\n        <\/details>\r\n      <\/div>\r\n    <\/div>\r\n    <div class=\"rfq\">\r\n      <span class=\"rfqn\">04<\/span>\r\n      <h3 class=\"rfql\">What has prompted this?<\/h3>\r\n      <p class=\"rfwhy\">Two or three sentences are enough. You need no technical terms &mdash; we sort that out in the call.<\/p>\r\n      <div class=\"rffields\">\r\n        <label>Your description<textarea id=\"rf-msg\" name=\"msg\" rows=\"4\" placeholder=\"For example: house taken over in 2023, a push-button in the hallway no longer switches anything, no documentation of the controls.\"><\/textarea><\/label>\r\n      <\/div>\r\n    <\/div>\r\n    <label class=\"rfhp\">Website<input type=\"text\" id=\"rf-web\" name=\"website\" tabindex=\"-1\" autocomplete=\"off\"><\/label>\r\n    <div class=\"rfsend\">\r\n      <p class=\"rfsig\">A planner from our team reads it &mdash; somebody who would later look at the system themselves. We treat details of your property as confidential and never show them in any reference.<\/p>\r\n      <button type=\"submit\" class=\"rfbtn\">Send enquiry &mdash; we will be in touch <span class=\"ar\">&rarr;<\/span><\/button>\r\n      <p class=\"rfnote\">We use your details solely to deal with this enquiry. More in our <a href=\"\/datenschutz\/\">privacy notice<\/a>.<\/p>\r\n      <noscript><p class=\"rfnoscript\">JavaScript is required to send. Call us instead: <a href=\"tel:+4921183866870\">+49 211 838 66 870<\/a> or write to <a href=\"mailto:info@smartfabrik.de\">info@smartfabrik.de<\/a>.<\/p><\/noscript>\r\n      <p class=\"rfmsg\" id=\"rf-status\" role=\"status\"><\/p>\r\n    <\/div>\r\n  <\/form>\r\n<\/div><\/div><\/section>\r\n<script>(function(){\r\n  var f=document.getElementById('rf'); if(!f) return;\r\n  var s=document.getElementById('rf-status');\r\n  function v(id){var e=document.getElementById(id);return e?e.value.trim():''}\r\n  f.addEventListener('submit',function(ev){\r\n    ev.preventDefault();\r\n    if(!v('rf-name')||!v('rf-mail')){s.textContent='Bitte Name und E-Mail angeben.';s.className='rfmsg err';return}\r\n    var btn=f.querySelector('.rfbtn'); btn.disabled=true; s.textContent='Wird gesendet \\u2026'; s.className='rfmsg';\r\n    var msg='Objektart: '+v('rf-art')+'\\nStandort: '+v('rf-ort')+'\\nETS-Datei: '+v('rf-datei')\r\n      +(v('rf-firma')?'\\nFirma: '+v('rf-firma'):'')+'\\n\\n'+v('rf-msg');\r\n    var attr={}; try{ if(window.sfTrack) attr=window.sfTrack.attr() }catch(e){}\r\n    fetch('\/wp-json\/sf\/v1\/contact',{method:'POST',headers:{'Content-Type':'application\/json'},\r\n      body:JSON.stringify({name:v('rf-name'),tel:v('rf-tel'),mail:v('rf-mail'),art:v('rf-art'),msg:msg,\r\n        quelle:\"Erweiterung im Bestand\",page:location.pathname,website:v('rf-web'),sf_attr:JSON.stringify(attr)})})\r\n    .then(function(r){return r.json()}).then(function(j){\r\n      if(j&&j.ok){ btn.style.display='none';\r\n        s.textContent='Danke \\u2014 wir melden uns in der Regel am selben Werktag.'; s.className='rfmsg ok';\r\n        try{ if(window.sfLead){ window.sfLead({form_id:\"knx-anlage-erweitern\",lead_type:'rekonstruktion',email:v('rf-mail'),phone:v('rf-tel')}) } else { (window.dataLayer=window.dataLayer||[]).push({event:'sf_lead',form_id:\"knx-anlage-erweitern\",lead_type:'rekonstruktion'}) } }catch(e){}\r\n      } else { btn.disabled=false; s.textContent='Das hat nicht geklappt. Bitte rufen Sie uns kurz an: +49 211 838 66 870.'; s.className='rfmsg err' }\r\n    }).catch(function(){ btn.disabled=false; s.textContent='Das hat nicht geklappt. Bitte rufen Sie uns kurz an: +49 211 838 66 870.'; s.className='rfmsg err' });\r\n  });\r\n})();<\/script>\r\n\r\n<section class=\"faq\"><div class=\"wrap\"><div class=\"sec-h\"><span class=\"eyebrow\">FAQ<\/span><h2>Clearly answered.<\/h2><\/div><details><summary>Can our existing KNX system be extended at all?<\/summary><p>Yes, that is what the project is for. With the complete ETS project, new devices, additional group addresses and even a further line can be planned: we see the existing topology and the free address ranges and build on them. The limits are set by the hardware rather than the project \u2014 whether the actuator still has a free channel, whether the cable runs to the desired spot, how heavily the KNX power supply is loaded. If your project comes from a reconstruction, we additionally check at device level: Gira itself notes for the push-button sensor 2 with controller that changes made after a readout do not permanently reach the device, and recommends re-inserting and re-programming it.<\/p><\/details><details><summary>Is our existing ETS project sufficient for the extension?<\/summary><p>Usually yes, but two checks are part of it. First, the ETS generation and the product data: devices whose application program exists only as an old plug-in often can no longer be parameterised with a current ETS \u2014 then what remains is replacement or working on an older version. Second, access: the project password, and for a KNX Secure system the keyring. Without the keys, a Secure device can neither be read out nor reloaded, and the printed FDSK does not help because it is replaced at first commissioning. If the project file is missing entirely, the path begins one step earlier \u2014 with reading out the system, which we describe on a page of its own.<\/p><\/details><details><summary>Does the system keep running while it is being extended?<\/summary><p>Not continuously, and we do not promise that either. Every programming operation interrupts the function of the device concerned \u2014 seconds to a few minutes depending on scope, plus the restart afterwards. When individual functions are checked, real loads switch: lights come on, a blind moves. What we can promise is a device-by-device approach and agreed time windows in which it is clear which part of the house is currently not responding as usual. In occupied houses and properties in operation, we set these windows with you in advance.<\/p><\/details><details><summary>The heat pump is already ordered \u2014 is that still possible?<\/summary><p>Yes, but the sequence is then different. Once the device is chosen, we work with what it offers: via the SG-Ready contacts that is two switching commands and four operating states, no more \u2014 operating data and setpoints only come via Modbus, EEBus or a manufacturer's own module. The same applies to the charging point: surplus charging requires a controllable wallbox and physically starts at around six amps per phase. We clarify this per device against the data point list. If a device offers nothing usable, it stays standalone, and we tell you so.<\/p><\/details><details><summary>What does an extension cost?<\/summary><p>We do not quote a flat figure. The effort depends on how many devices are added, whether the existing topology supports them and how well maintained the project is. That is why the capacity check comes first: after it, the scope can be stated; before it, any figure would be guesswork. The invoices also remain separate: planning, programming and documentation come from us, materials and installation from our sister company elektrofabrik \u2014 or from your own contractor if you already have one. The updated ETS project and the documentation are handed over to you.<\/p><\/details><\/div><\/section>\r\n\r\n<section class=\"del\"><div class=\"wrap\" style=\"text-align:center\">\r\n  <span class=\"eyebrow\" style=\"justify-content:center\">The full picture<\/span>\r\n  <h2 style=\"font-weight:900;font-size:clamp(23px,3vw,32px);margin:14px 0 20px\">All about the KNX service<\/h2>\r\n  <p style=\"color:var(--muted);max-width:62ch;margin:0 auto 26px\">Extending is one of several routes for a system that already exists. The overview sorts them by your starting position \u2014 and also leads to where things begin when documents are missing.<\/p>\r\n  <a class=\"backpill\" href=\"\/en\/knx-service\/\">To the KNX service overview <span class=\"ar\">&rarr;<\/span><\/a>\r\n<\/div><\/section>\r\n\r\n<section class=\"orte\"><div class=\"wrap\">\r\n  <div class=\"sec-h\"><span class=\"eyebrow\">Where we work<\/span><h2>KNX service in Cologne, D\u00fcsseldorf &amp; NRW.<\/h2>\r\n  <p>smartfabrik is a smart home planning practice based in D\u00fcsseldorf (Reisholzer Werftstr. 31A). We plan for private clients and companies in Cologne, D\u00fcsseldorf and across North Rhine-Westphalia \u2014 and, where wanted, nationwide and internationally. A selection of the places we have already planned and delivered in:<\/p><\/div>\r\n  <div class=\"ochips\"><a href=\"\/en\/smart-home-cologne\/\">Cologne-Marienburg<\/a><a href=\"\/en\/smart-home-cologne\/\">Cologne-Rodenkirchen<\/a><a href=\"\/en\/smart-home-cologne\/\">Cologne-S\u00fcrth<\/a><a href=\"\/en\/smart-home-cologne\/\">Cologne-Lindenthal<\/a><a href=\"\/en\/smart-home-cologne\/\">Cologne-Braunsfeld<\/a><a href=\"\/en\/smart-home-duesseldorf\/\">D\u00fcsseldorf-Oberkassel<\/a><a href=\"\/en\/projects\/\">Neuss<\/a><a href=\"\/en\/projects\/\">Kaarst<\/a><a href=\"\/en\/projects\/\">Moers<\/a><a href=\"\/en\/projects\/\">Essen<\/a><a href=\"\/en\/projects\/\">Solingen<\/a><a href=\"\/en\/smart-home-cologne\/\">Br\u00fchl<\/a><a href=\"\/en\/projects\/\">Aachen<\/a><a href=\"\/en\/projects\/\">Berlin<\/a><a href=\"\/en\/projects\/\">Hamburg<\/a><a href=\"\/en\/projects\/\">Mainz<\/a><a href=\"\/en\/projects\/\">Mallorca<\/a><a href=\"\/en\/projects\/\">Riyadh<\/a><\/div>\r\n<\/div><\/section>\r\n<\/div><footer class=\"blpfoot\" data-sf-lang=\"en\"><div class=\"wrap\"><div class=\"ftop\"><div class=\"fbrand\"><a href=\"\/en\/\" class=\"blogo\" aria-label=\"smartfabrik\"><\/a><p>Manufacturer-independent smart home &amp; KNX planning. Carried out by elektrofabrik. Cologne \u00b7 D\u00fcsseldorf \u00b7 NRW.<\/p><\/div><nav class=\"fcol\"><span class=\"fh\">Services<\/span><a href=\"\/en\/services\/\">All services<\/a><a href=\"\/en\/for-private-clients\/\">For private clients<\/a><a href=\"\/en\/for-developers\/\">For developers &amp; commercial<\/a><a href=\"\/en\/basalte\/\">Basalte<\/a><a href=\"\/en\/network-security-systems\/\">Network &amp; security<\/a><a href=\"\/en\/knx-service\/\">KNX service<\/a><\/nav><nav class=\"fcol\"><span class=\"fh\">Company<\/span><a href=\"\/en\/projects\/\">Projects<\/a><a href=\"\/en\/partners\/\">Partners<\/a><a href=\"\/en\/team\/\">Team<\/a><a href=\"\/en\/smartnews\/\">smartnews<\/a><\/nav><nav class=\"fcol\"><span class=\"fh\">Contact<\/span><a href=\"tel:+4921183866870\">+49 211 838 66 870<\/a><a href=\"mailto:info@smartfabrik.de\">info@smartfabrik.de<\/a><a href=\"\/en\/contact\/\">Contact form<\/a><span class=\"fregion\">Cologne \u00b7 D\u00fcsseldorf \u00b7 North Rhine-Westphalia<\/span><\/nav><\/div><div class=\"fregionen\"><span>Locally:<\/span><a href=\"\/en\/smart-home-cologne\/\">Smart Home Cologne<\/a><a href=\"\/en\/smart-home-duesseldorf\/\">Smart Home D\u00fcsseldorf<\/a><\/div><div class=\"fbot\"><span>\u00a9 smartfabrik \u00b7 Cologne \u00b7 D\u00fcsseldorf \u00b7 NRW<\/span><nav><a href=\"\/en\/imprint\/\">Legal notice<\/a><a href=\"\/en\/privacy-policy\/\">Privacy<\/a><\/nav><\/div><\/div><\/footer><script>(function(){var io=new IntersectionObserver(function(es){es.forEach(function(e){if(e.isIntersecting){e.target.classList.add('in');io.unobserve(e.target)}})},{threshold:.08});document.querySelectorAll('.sp .reveal').forEach(function(el){io.observe(el)});})();<\/script>\r\n<script type=\"application\/ld+json\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Service\",\"name\":\"KNX System Extension: Capacity Check\",\"serviceType\":\"KNX service\",\"provider\":{\"@type\":\"ProfessionalService\",\"name\":\"smartfabrik GmbH\",\"telephone\":\"+49 211 838 66 870\",\"email\":\"info@smartfabrik.de\",\"address\":{\"@type\":\"PostalAddress\",\"streetAddress\":\"Reisholzer Werftstr. 31A\",\"postalCode\":\"40589\",\"addressLocality\":\"D\u00fcsseldorf\",\"addressCountry\":\"DE\"},\"areaServed\":[\"K\u00f6ln\",\"D\u00fcsseldorf\",\"Nordrhein-Westfalen\",\"Deutschland\"]},\"description\":\"Extension, loft conversion or heat pump on a live KNX system: we check lines, addresses and distribution board reserves and plan the extension in the project.\",\"inLanguage\":\"en\"},{\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"Can our existing KNX system be extended at all?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes, that is what the project is for. With the complete ETS project, new devices, additional group addresses and even a further line can be planned: we see the existing topology and the free address ranges and build on them. The limits are set by the hardware rather than the project \u2014 whether the actuator still has a free channel, whether the cable runs to the desired spot, how heavily the KNX power supply is loaded. If your project comes from a reconstruction, we additionally check at device level: Gira itself notes for the push-button sensor 2 with controller that changes made after a readout do not permanently reach the device, and recommends re-inserting and re-programming it.\"}},{\"@type\":\"Question\",\"name\":\"Is our existing ETS project sufficient for the extension?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Usually yes, but two checks are part of it. 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The updated ETS project and the documentation are handed over to you.\"}}],\"inLanguage\":\"en\"}]}<\/script>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Leistungen KNX-Service Referenzen Partner Team Kontakt DEENARBeratung &rarr; Erweiterung im Bestand KNX-Anlage erweitern \u2014 erst pr\u00fcfen, was der Bus tr\u00e4gt. Die Anlage l\u00e4uft seit Jahren, das ETS-Projekt liegt vor \u2014 und jetzt soll etwas dazukommen: ein Anbau, das ausgebaute Dachgeschoss, der Au\u00dfenbereich, eine W\u00e4rmepumpe. Ob daraus eine Erweiterung wird oder ein Umbau der Topologie, entscheidet&hellip; <a class=\"more-link\" href=\"https:\/\/smartfabrik.de\/en\/knx-service\/knx-system-extension\/\">Continue reading <span class=\"screen-reader-text\">KNX System Extension: Capacity Check | smartfabrik<\/span><\/a><\/p>\n","protected":false},"author":0,"featured_media":0,"parent":10156,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"elementor_canvas","meta":{"footnotes":""},"class_list":["post-10162","page","type-page","status-publish","hentry","entry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>KNX System Extension: Capacity Check | smartfabrik<\/title>\n<meta name=\"description\" content=\"Extension, loft conversion or heat pump on a live KNX system: we check lines, addresses and distribution board reserves and plan the extension in the project.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/smartfabrik.de\/en\/knx-service\/knx-system-extension\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"KNX System Extension: Capacity Check | smartfabrik\" \/>\n<meta property=\"og:description\" content=\"Extension, loft conversion or heat pump on a live KNX system: we check lines, addresses and distribution board reserves and plan the extension in the project.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/smartfabrik.de\/en\/knx-service\/knx-system-extension\/\" \/>\n<meta property=\"og:site_name\" content=\"smartfabrik\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/smartfabrik\" \/>\n<meta property=\"article:modified_time\" content=\"2026-08-23T08:12:04+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/smartfabrik.de\/wp-content\/uploads\/2023\/10\/smartfabrik-logo-fox.png\" \/>\n\t<meta property=\"og:image:width\" content=\"355\" \/>\n\t<meta property=\"og:image:height\" content=\"379\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"9 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/smartfabrik.de\\\/en\\\/knx-service\\\/knx-system-extension\\\/\",\"url\":\"https:\\\/\\\/smartfabrik.de\\\/en\\\/knx-service\\\/knx-system-extension\\\/\",\"name\":\"KNX System Extension: Capacity Check | smartfabrik\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/smartfabrik.de\\\/en\\\/#website\"},\"datePublished\":\"2026-08-18T13:23:12+00:00\",\"dateModified\":\"2026-08-23T08:12:04+00:00\",\"description\":\"Extension, loft conversion or heat pump on a live KNX system: we check lines, addresses and distribution board reserves and plan the extension in the project.\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/smartfabrik.de\\\/en\\\/knx-service\\\/knx-system-extension\\\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/smartfabrik.de\\\/en\\\/knx-service\\\/knx-system-extension\\\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/smartfabrik.de\\\/en\\\/knx-service\\\/knx-system-extension\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home page\",\"item\":\"https:\\\/\\\/smartfabrik.de\\\/en\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"KNX Service: Plan &#038; 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