Many thanks for your response. As the existing Samba SM43 is already equipped with an Ethernet card to control the existing external I / O's, the Samba can not be equipped with an RS-232 card. This means that the barcodescanner should also run on Ethernet TCP / IP based to be able to be integrated. Since the scanners are very expensive are about 5,200 € (Sick CLV690-000), I wanted to know once if someone has experience with it before I buy such a scanner. Now I think that I will tread the more inexpensive way. I will replace the SPS with a VISION 570 and then use a barcode scanner with RS 232. However, I have to convert the entire existing program of the SM43.