Interface Specifications

Signal

Pin

RS-232C RS-422 Direction

Description

20

DTR

OUT

Data terminal ready. This pin indicates whether or not the printer is ready to receive data. If the printer ready protocol is not selected, this pin is always HIGH (i.e. the printer is ready to receive data). If printer ready protocol is selected, the printer can accept data when the pin level is HIGH, and cannot accept data when the pin level is LOW. When the DTR signal goes LOW the host computer must stop sending data within 128 characters. Can be set HIGH or LOW with SelecType.

Although RTS, CTS, DSR, DTR, and DCD are designated as RS-232C signals, they can also be used when RS-422 is selected with SelecType.

Technical Specifications

8-15