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Signal
Pin
20
RS-232C RS-422
Direction
DTR
OUT
22 RING
ignored
Description
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 RS232C signals,
they can also be used when RS-422 is selected with SelecType.
AppleTalk
You printer is equipped with an 8-pin AppleTalk interface for use
with the Apple Macintosh.
8-16
Technical Specifications