<?xml version="1.0" encoding="UTF-8" standalone="no"?><?Xpress productLine="ncc-clause" ?><clause id="_36317721-f815-4bd1-bbc0-2c9b2860e87e" outputclass="ncc-clause"><meta><facet building="Class 1a"/><facet building="Class 1b"/><facet building="Class 4"/><facet building="Class 5"/><facet building="Class 6"/><facet building="Class 7a"/><facet building="Class 7b"/><facet building="Class 8"/><facet building="Class 9a"/><facet building="Class 9b"/><facet building="Class 9c"/><facet building="Class 10a"/><facet building="Class 10b"/><facet building="Class 10c"/></meta><sptc>S23C6</sptc><title id="_3c6b49e5-ff4a-4113-ac01-81efe6c6a583">Signal isolation interface units</title><archive-num>2019: Spec E2.2d: 2(d)</archive-num><subclause id="_662e319d-5d07-42ba-b080-0c6c0ff09ed6" outputclass="subclause"><title id="_4608e3ca-95b4-4f9a-b59e-8a09ed7c25e1">SubClause</title><num>1</num><p>Signal isolation interface units must isolate any <xref format="dita" href="/tmp/QppServer/Publishing/5e2c1f63-e589-4ce1-95e8-5c3e286a7aff/1367_4.0.0.xml#_9e123bf7-7fde-4888-864b-3274980990f2" id="_39f870f6-e979-4b1e-879a-9ac5f53b1058" scope="local" type="abcb-glossentry">low voltage</xref> connected to the smoke alarms from the local fire indicator panel.</p></subclause><subclause id="_aba13db8-3e0d-4a75-a147-aab13ff1c3b9" outputclass="subclause"><title id="_bfcb4064-ad5e-4478-a293-2d5ae94df829">SubClause</title><num>2</num><p>Signal isolation interface units must be certified by an <xref format="dita" href="/tmp/QppServer/Publishing/5e2c1f63-e589-4ce1-95e8-5c3e286a7aff/1175_0.13.0.xml#_52d35595-b475-460e-ac5e-5cd3e0a72e5f" id="_80be0cb5-de31-4dc9-a7ad-b8acb33b655a" scope="local" type="abcb-glossentry">Accredited Testing Laboratory</xref> as compatible with the specific types of smoke alarms used in the system.</p></subclause><subclause id="_85080b91-518e-46d4-87d1-6d09ec5a957d" outputclass="subclause"><title id="_826c7bc7-ad49-47d5-8788-1f357098a14d">SubClause</title><num>3</num><p>Signal isolation interface units must be accepted by the electricity supply authority.</p></subclause><subclause id="_0306d1c8-750a-4e2d-b250-a95ee85ee64c" outputclass="subclause"><title id="_468767b4-8554-4ae4-9e96-6ad3238252d6">SubClause</title><num>4</num><p>Units must be marked in a clearly visible location, with letters greater than or equal to 35 mm containing the following information:</p><signage>SMOKE ALARM SIGNAL ISOLATION UNIT WARNING – 240 V</signage><signage>Isolate power supply before removing cover</signage></subclause></clause>