Simplex 4009-9814 Class A Adapter ModuleSimplex fire alarm control panels with IDNAC SLC outputs provide individual address and control of TrueAlert and TrueAlert ES addressable notification appliances. When an IDNAC SLC reaches the current limit or the distance limit of the source IDNAC SLC, use of 4009 IDNAC Repeaters extends the IDNAC SLC with an additional 3 A of SLC current and up to 139 unit loads of additional supervisory capacity. With IDNAC SLCs, a constant 29 VDC source voltage is