Digital input and pulse counter

When configuring the digital I/O pin as a digital input, it allows the following modes of operation:

• Input mode: The Connect Sensor+ gets the digital input value at scheduled sensor readings. You can configure it to send an alarm report for specific input values or when an input value changes. You can also configure the Connect Sensor+ to wake from sleep mode when an input value changes (rising edge or falling edge wake).
• Pulse counter: When connected to a mechanical meter, the Connect Sensor+ counts pulses during Connect Sensor+ sleep cycles and reports them to Remote Manager during normal reporting intervals.

Each mode has a pull-up resistor that you can enable or disable. The pull-up indicates the digital input’s state when there is no external voltage.

Note If you enable the pull-up resistor, it will constantly draw power. Depending on the current flow to the sensor, you may need to externally power the Connect Sensor+.

The following figure shows a digital input with the pull-up resistor enabled where it is driving an external relay.