Brother International HL-3400CN Users Manual - English - Page 252
Data Set Ready. When DSR is at SPACE level, Request To Send. SPACE level when
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USER'S GUIDE 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. A-12
USER’S GUIDE
A–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.