An I/O expander is a type of hardware that allows more than one input & output security device (such as detectors, sirens etc) to connect to a single port of a security alarm panel.
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Access ControlHikvision DS-K2M0012X
Read moreHikvision DS-K2M0012X Intrusion I/O Expansion Module – Works with DS-K270X Access Controllers – Supports 8 Alarm Inputs and 4 Alarm Outputs
