Multi-Tech Systems 7500 - Manual (Page 218)

Digital Input Module ION 7500 / ION 7600 User’s Guide
Page 218 Digital and Analog I/O Technical Note
N OTE
ION 7300 Series, ION 7500, ION 7600 and ION 7700 meters have factory preconfigured Digital Input
modules, as well as Counter modules for counting status changes, and External Pulse modules for
resetting counter modules.
Detailed Operation: Pulse or KYZ Input Mode
Digital inputs can be set in either a pulse or KYZ configuration. In pulse
applications you specify the module registers to change (on or off) when a signal
occurs for the specified debounce time (usually between 0-5ms for solid state dry
contact, and 1-80ms for mechanical dry contacts). In KYZ applications a transition
occurs when a signal is received, the transition remains at least as long as the
debounce time. When the next transition occurs, the input module state changes
again. This type of redundancy is important in utility applications where the
pulses correspond to energy consumption.