https://www.barjamka.cz/eshop.rystol.cz/pruchodky-nerezavejici/pruchodky-s-podlozkou-vnitrni-10-mm-vnejsi-17-mm-s-kaminky/?variantId=2775155

Dahua expander ARM808-RS

Input Expansion Module > 8-channel alarm inputs > 2-channel alarm outputs > Address setting with DIP switch > EOLR configuration (2K7, 4K7, and 6K8) > Alarm output switch between NO (Normally Open) and NC (Normally Closed) with jumper > Remote update by client software


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