The GPIO connector is Micro-Fit 3.0™ 2 x 7 position 3.0 mm pitch connector manufactured by Molex
Digital inputs have pull-down resistors. All general purpose I/O (GPIO) pins (i.e. all input and outputs) have transient protection.
The I/O port provides for the control of 4 external devices and for monitoring 4 external inputs.
GPIO Pin # | Color Code | Signal | Name |
1 | Brown | INPUT1 | Single Ended Input 1 |
2 | Orange | INPUT2 | Single Ended Input 2 |
3 | Yellow | INPUT3 | Single Ended Input 3 |
4 | Green | INPUT4 | Single Ended Input 4 |
5 | Red | VCC | Power (Power supply output – fused) |
6 | RS485 | Negative | |
7 | RS232 | RxD | |
8 | Blue | DOUT1 | Output 1 |
9 | Violet/Purple | DOUT2 | Output 2 |
10 | Gray | DOUT3 | Output 3 |
11 | White | DOUT4 | Output 4 |
12 | Black | GND | Common Ground for Power |
13 | RS485 | Positive | |
14 | RS232 | TxD |
GPIO Output Connection
The 4 outputs are configured as "open drain," enabling direct connection “open drain” which means that they can be directly connected to energize external relays, lamps, or other DC devices.
The maximum Maximum supply voltage is 36 volts, with a maximum load current of 500mA.
It is recommended to use Recommended wire gauge for use with the connector is 20-24 AWG wire gauge with the connector. Please note . Note that the OUT GND connection is linked connected to the CTM-500's ONE’s supply ground.
GPIO Input Connection
The 4 inputs on may be configured in the CTM-500 can be configured ONE for monitoring either 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 range is 0 -volts while the maximum is 36 volts.
The threshold detection voltage is set at 2.5 volts with 1 volt of hysteresis. Please note Note that the IN GND connection is referenced to the CTM-500’s ONE’s supply ground.
Analog Analog input values are 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 a 10mV resolution of 10mV. The input can tolerate voltages withstand up to 36 volts. Please note Note that the IN GND connection is referenced to the CTM-500’s ONE’s supply ground.
Example of Single Ended Analog Input Wiring
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