The Initiating Device Circuit Expander (IDC-6) provides an additional 6 inputs per module. The panel supports up to thirty-one (31) IDC-6 modules. The circuits are power-limited and supervised. All inputs are suitable to monitor 2-wire smoke detectors. Smoke detectors shall be installed in compliance with NFPA 72. Inputs can also be used for automatic, manual, waterflow or supervisory service. The IDC-6 communicates via the PLink communication bus. The IDC-6 can be mounted in either the control panel cabinet, the intelligent power supply, AE-2, AE-8 or the AE-14 expander cabinet. Each card is mounted to the exclusive Stacker Bracket for secure and accessible mounting.