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I want to create a Universal 8 X I/O I2C/GPIO 24V Interface Card.The objective is to monitor 8 inputs(24V) and 8 outputs(24V) can be driven. The user can choose between the I2C protocol or 16 GPIO Pins.With the jumpers (SV2, SV3) you choose the I2C protocol.Using a ribbon cable (SV

I want to create a Universal 8 X I/O I2C/GPIO 24V Interface Card.
The objective is to monitor 8 inputs(24V) and 8 outputs(24V) can be driven.
 
The user can choose between the I2C protocol or 16 GPIO Pins.
  1. With the jumpers (SV2, SV3) you choose the I2C protocol.
  2. Using a ribbon cable (SV2, SV3) you can make connection with GPIO-Pins. Without using the PCA9555.

Schematic and a picture to connect sensors and actuators is included.

2013-12-18
First PCB test succeedded.
PCB and schematic update.
2013-10-10
Successful 1 Input / 1output hardware test.
Schematic and PCB updated.
Schematic of Test Set-up.
2013-09-16
Output interface test.
2013-08-21
Schematic and PCB created with eagle (not tested).
2013-08-21
Decoupling capacitors placed.
2013-08-15
Optocouplers ILQ615 changed to an ACPL-847.
Resistor R4 changed from 200R to R25 (150R), capacitors deleted.
The 2k2 resistor is split into a R26(1k/250mW) and a R27(1k2/250mW).

Error found let me know. Thanks in advance.

Home site: http://www.dcisite.be/plux.html#interface (more info).