Epson 24-PIN DOT MATRIX PRINTER LQ-570+ - Manual (Page 97)

You can use optional interface cards to supplement your
printer's built-in parallel interface.
The Epson Interface cards below are compatible with your
printer.(Not all interfaces are available in all countries)
+ This is a substitute for the last digit, which varies by country.
If you are
unsure whether you need an optional interface or
would like to know more about interfaces, contact your dealer.
Installing an interface card
Follow the steps below to install an optional interface card.
1. Make sure the printer is turned off. Unplug the printer's
power cord and disconnect the interface cable.
4-14 Using Printer Options