Cypress CTM-ONE - GPIO Output Connection; GPIO Input Connection

© 2021 Cypress Solutions Manual: CTM-ONE (Revision 1.0)
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Installing the CTM-ONE.
5.8.1 GPIO Output Connection
The 4 outputs are configured as “open drain” which means that they can be directly connected to energize
external relays, lamps or other DC devices.
Maximum supply voltage is 36 volts, with a maximum load current of 500mA.
Recommended wire gauge for use with the connector is 20-24 AWG. Note that the OUT GND connection is
connected to the CTM-ONE’s supply ground.
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: