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The DGM-32/64 Is a data gathering module (DGM) that monitors dry contacts. The units communicate with the System 3505 head-end via dedicated cable pair. One pair of wires is capable of monitoring multiple panels. In turn, each DGM panel monitors 32 or 64 end-of-line resistor alarm inputs. The System 3505 polls the DGM panel for any change in status; any status change is passed to the head end. Additionally, the DGM panels hold the changes in memory—even after a condition clears. Supervised inputs report any break in the circuit as a Trouble condition by zone.
The DGM-32/64-RLY is suitable for an installation that will start out at (or expand later to) 64 end-of-line resistor alarm inputs with relay control systems that can be purchased separately. The RLY suffix indicates that the DGM can be equipped with relay control initially OR in the future.