Citizen Systems iDP-3423 - Manual (Page 52)

iDP-3420/3421/3423 User’s Manual
52 CITIZEN
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(1) RS-232C circuit
Input (RXD, DSR, mRXD)
[Printer Side] [Host Side]
Output (DTR, TXD, mTXD, RCH, RTS, FAULT)
Equivalent to MAX232
Mark=(-8V): At Busy Mark=(-8V): 1
Space=(+8V): At Ready Space=(+8V): 0
(2) Others
·RESET : A signal to reset the entire printer.
·PE : A signal to show that the paper has run out. Normal at the "LOW" level,
but turned to the "HIGH" level when the paper has run out.
·GND : Signal ground
·FG : Frame ground
Equivalent MAX232
RXD
Mark=(-8V): Stop bit
Space=(+8V): Start bit
DTR TXD