3. In the current sample system, we use a Datalogic Gryphon GD4130[1]. It comes with a default RS232 setting that only uses the hardware handshake RTS. In that case, we only need the pins 2 RXD, 5 GND, and 7 RTS. Therefore, we have bolded them in the following table. The connection from PD601 to the barcode reader is 1:1 and is therefore straightforward:
See the manual here, where the front page is in Portuguese, but the content is in English: