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