Installing a stand-alone AEM 25Application Equipment ModuleInstallation guideAlarm connections with ST or RT systemsTable 4 lists the hardware required for alarm connections between an AEMcolumn and ST or RT systems.If the AEM column is connected to a Power Fail Transfer Unit (PFTU) oryou want an external alarm (such as a light or bell) for the AEM column,connect the system monitor to the main distribution frame (MDF).Table 4xxxST/RT alarm connection hardware requirementsSL-1 system type Hardware required (one of each)ST with QCA136 cabinet NT8D46AY System Monitor CableNT8D46BF System Monitor Cable (Note 1)NT8D46BH System Monitor Cable (Note 1)QCAD309 Alarm Adapter cable (Note 2)P0678258 Filter Connector (Note 2)ST with QCA136 and QCA137 cabinets NT8D46BC System Monitor CableNT8D46BE System Monitor CableNT8D46BM System Monitor CableQCAD310 Ground CableRT with QCA147 cabinet NT8D46AY System Monitor CableNT8D46BF System Monitor Cable (Note 1)NT8D46BH System Monitor Cable (Note 1)RT with QCA147 and QCA137 cabinets NT8D46CH System Monitor CableNT8D46BF System Monitor Cable (Note 1)NT8D46BH System Monitor Cable (Note 1)QCAD310 Ground CableRT with QCA147 and two QCA137cabinetsNT8D46BC System Monitor CableNT8D46BE System Monitor CableNT8D46BL System Monitor CableNT8D46BF System Monitor Cable (Note1)NT8D46BH System Monitor Cable (Note 1)QCAD310 Ground CableNote 1: The NT8D46BF and NT8D46BH cables are only required when extending thealarm connections to the MDF.Note 2: ST systems consisting of a single QCA136 cabinet require the installation of aQCAD309 Alarm Adapter cable and one P0678258 Filter Connector.