Accessing a PLC remotely . There are communication interfaces present in the majority of PLCs. These ports commonly employ the RS-232, RS-422, RS-485, or Ethernet protocols. PLC configuration is ...

That's why laptops with a true RS232 serial port are at a premium for certain applications.<BR><BR>There are *some* USB-Serial bridges that are better than others.

Bring Back the RS-232 Serial Port. Jan. 24, 2012. I know, RS-232 is not gone completely but in most things it has disappeared. Recently I bought a new laptop to use in my ham shack.

The award-winning Vision all-in-one PLC series welcomes its newest member—the Vision700. ... a USB programming port and an RS232/RS485 port; An additional RS232/RS485 or Profibus communication can be ...

The need arose for a programmable control system that handles 8-bit data to have both RS-232 and RS-485 modes. ... P2 with lines Rx and Tx was connected to the PC's RS-232 serial port.

Each RS-232 port is capable of supporting data communication rates up to 921.6 kbps and implement full modem control signals to ensure compatibility with a broad variety of serial devices. RS-422 and ...