Specifications

Signal ground. This pin provides
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), the printer
is ready to receive data. If the
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, DTR, and DCD are designated as RS-232C signals,
they can also be used when RS-422 is selected with SelecType.
RS-422-level signals shown in parentheses above can be set using
SelecType.
A-10 Technical Specmti