The D7052 Multiplex Dual‐input Module connects normally‐open (NO) contacts to the multiplex bus of a D7024, DS9400M, or FPD‐7024 Addressable Fire Alarm Control Panel (FACP). Use the module for two Class B (Style B) supervised inputs or one Class A (Style D) input. All operating power for the input module is drawn from the FACP.