Submitted by dciadmin on Mon, 07/28/2014 - 19:23
Hardware setup
You must connect at least one portexpander module (with a pca9555) on the Raspberry Pi board!
How to connect the hardware to the Raspberry Pi B+ board.
Raspberry Pi Connection
Raspberry Pi B + used sockets.
Submitted by dciadmin on Sun, 07/27/2014 - 19:28
Test board
Test board for Gnublin Port Expander.
Schematic
Submitted by dciadmin on Sun, 07/27/2014 - 18:42
Digital Input/ Output interface card
Digital Input/ Output interface card with 8 inputs 24 V DC and 8 outputs 24 V DC; 0.5 A galvanically isolated, and with LED status indicators.
Digital input/ output modules permit connection of the RPI board to digital signals of the process and the output of digital signals from the RPI board to the process.
Submitted by dciadmin on Thu, 01/16/2014 - 10:37
Raspberry and I2C Interface
For coupling the embedded Linux board to various types of devices, relays and sensors an expansion board is needed. Here you can find more information on how to do this.
I2C interface
With two wires it possible to address up to 1136 members. I2C is a synchronous bidirectional communication system that allows devices to transfer data using only two wires: a bidirectional data line (SDA) and a clock line (SCL).
Max clock rate: 400kHz.
The I/O board contains a PCA9555.
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