5.8.2 GPIO Input Connection
The 4 inputs may be configured in the CTM-ONE for monitoring a digital DC voltage state or an analog DC
voltage. All of the inputs are single ended.
For digital state monitoring, the minimum input voltage is 0 volts while the maximum is 36 volts.
The threshold detection voltage is 2.5 volts with 1 volt of hysteresis. Note that the IN GND connection is
referenced to the CTM-ONE’s supply ground.
Analog input values will be sampled and can be reported at a maximum frequency of 10Hz.
Example of Digital Input wiring:
For analog voltage monitoring the measurement range is 0 to +10 volts with 10mV resolution. The input can
withstand up to 36 volts. Note that the IN GND connection is referenced to the CTM-ONE’s supply ground.
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