Simplex 4009-9814 Repeater class A adapter Simplex 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 maintained in alarm, even during battery standby, allowing strobes to operate at higher voltage with lower current and ensuring a consistent current draw and voltage drop margin under both primary power and secondary battery standby. Efficiencies include wiring distances up to 2 to 3 times farther than with conventional notification, or support for more appliances per IDNAC SLC, or use of smaller gauge wiring, or combinations of these benefits, all providing installation and maintenance savings with high assurance that appliances that operate during normal system testing will operate during worst case alarm conditions. All fire alarm parts should be installed and tested by a certified fire alarm professional as required by local codes and NFPA. Disclaimer: We are not affiliated with any fire alarm manufacturers or dealers. We offer high quality new and seller reconditioned reliable fire alarm parts to help you maintain your existing fire systems. We buy, sell, and liquidate excess fire alarm parts. We are selling a huge amount of new alarm equipment! Please take a look at our other listings! *WE CAN WORK OUT A DEAL FOR BULK ORDERS* SHELF: A