USER'S GUIDE
Appendix–12
Signal Description
Signal Name IN/OUT Explanation
FG
–
SD
OUT
RD
IN
RS
OUT
DR
IN
SG
–
ER
OUT
Frame Ground
Send Data.
Receive Data. Receives data transmitted from the
computer.
Request To Send. "SPACE" level when the printer
is ready to send data to the computer.
Data Set Ready. When DSR is at "SPACE" level,
data can be accepted.
Signal Ground
Data Terminal Ready. "MARK" level when the
printer is Busy.