Siemens DMA1104D Collective Button ElectronicsDMA 1104D

The DMA1104D is a single-action button electronics unit connected to conventional detection lines. Breaking the glass plate directly initiates an alarm; there is no separate button-pressing step. This design provides the fastest triggering. The LED on the unit continuously indicates operational status; the status can be determined without going to the panel to check if the line is de-energized or if the button has been activated.