Posted 19 Jun 2020 Hello, I need to connect multiple barcode readers (SICK CLP510) to a PLC (FX3GE-40M) for a university project. I need a minimum of 3 bar code readers, but only have one operational, connected via an additional modul for the use of rs-232. The only other port I can use is a miniDin 8, which is a build-in rs-422 port. Because this is a university project, it needs to be as cost efficient as posible. All the readers are CLP510 (pin-out attached bellow) Thanks Becky Pin_out___wire_colour___signal_comparison_CLP100_CLP510_CLV60x.pdf Share this post Link to post Share on other sites
Posted 19 Jun 2020 You're barcode readers are 232 so you'll need to add an additonal RS232 module and RS232 BD. There is a selection tool here https://www.mitsubishielectric.com/fa/ssl/products/cnt/plc_fx/ex/select/index.html Share this post Link to post Share on other sites
Posted 19 Jun 2020 I am already using one fx3g-232-bd modul, and the PLC only has room for one more on the rs-422 port (picture below). That is 2 readers max. I need 3 for the project, so i guess i will need to change to rs485 or 422 to make that possible, but I could not yet find a solution that would work Share this post Link to post Share on other sites
Posted 21 Jun 2020 if you must use RS232, get anther device that has bunch of RS232 ports: one for each reader (to get the data) and one for PLC (to forward received data) for example get Arduino Due or Mega or STM32 discovery board likehttps://microcontrollerslab.com/stm32f4-discovery-board-pinout-features-examples/ note those UART ports will still need an interface (level shifter) to get RS232 levels but this is this is easy and cheap to do if you want to use R422, add RS232/422 coverter to each reader. then you can connect all readers to a PLC on one bus. Share this post Link to post Share on other sites