yamandu:
After several test and trials and some discussion with the hardware supplier I could not make it work yet.In the last email from the supplier he asked me the following:
Please let me know if your Arduino accepts only RS232 TTL level data or not?
If that's the case, then we have to provide you the pinout/p assignment of the CD-620-R to you because our CD-620-R provides signal data as RS232 level, that may cause misread of code.I am insecure to answer this.
Anyone knows this, please?
You may reply arduino accepts TTL UART signals, 5V and 0V. It doesn't accept RS232 +-12V. You probably damaged either the scanner or arduino when you try to connect 0-5V arduino with +-12V scanner.