3
RS-422 Configuration
Serial Configuration
1. Determine the number of serial ports installed in your system. Each
serial port will have an unique "COM" designation. Configure the
ports of the RS422-550 for two unused COM addresses.
2. Determine which IRQs (interrupts) are free in your system. Configure
each serial port on the RS422-550 for an unused IRQ. Although some
devices allow sharing of IRQs, this is not recommended. If you are
using Windows and are unsure which IRQs are available in your PC,
open Control Panel, System, Device Manager, and double-click on
Computer. This will list the IRQs that are
. Select two unused
IRQs for the 2 ports on the RS422-550.
3a. For Serial 1, install the jumper above the number corresponding to
the desired IRQ, so that it covers the pin in the bottom row and the
pin in the middle row.
3b. For Serial 2, install the jumper above the number corresponding to
the desired IRQ, so that it covers the pin in the top row and the pin
in the middle row.
used
Do not install more than one IRQ jumper per serial port.
