Table of Contents
CP-IO19R - IO Relay Board Accessory for the ComfilePi
The CP-IO19R is an IO relay board accessory for the ComfilePi consisting of 11 inputs, 8 relay outputs, screw terminals, and corresponding indicator LEDs. It can be mounted to the rear panel of the ComfilePi.
C# Control Example
The following is an example project illustrating how to program the CP-IO19R in C# using the Mono Framework.
This example PInvoke's the pigpio library. For more information see the PInvoke documentation and the pigpiod C interface documentation
.NET 5 drivers can be found at the .NET IoT Libraries API Reference.
Pin Map
The CP-IO19R's pins are connected to the ComfilePi's GPIO header as shown below.
Inputs: GPIO 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 16
Outputs: GPIO 17, 18, 19, 20, 21, 22, 23, 24
Specifications and IO Circuitry
- Input Voltage: 5VDC (powered by ComfilePi's 5V pin)
- Current Rating: 400mA or more
- Humidity: 35 ~ 85% RH
- Temperature: -10 ~ 60 ℃
- Size: 128mm X 78mm
Inputs
- Voltage Range: 12 ~ 24V
- Absolute Min/Max Voltage Range: 3.3 ~ 28V
- Response Time: 5ms
- Input OFF Level: < 1.8VDC
- Input ON Level: > 2.5VDC
- Indicator LED OFF Level: < 4.5V
- Indicator LED ON Level: > 5.0V
Outputs
- Relay Driving Voltage: 24V (single power source)
- Relay Driving Current: 10mA
- Maximum Switching Voltage: 277VAC, 30VDC
- Maximum Switching Current: 5A(AC), 3A(DC)
- Maximum Switching Frequency: 10Hz
- For more information see the ALDP124 Datasheet.
Setting the Initial Output State
It may be necessary to modify the ComfilePi's initial GPIO output state to prevent the ComfilePi from turning the outputs ON when the ComfilePi boots. Use the following file to replace /boot/dt-blog.bin.