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iDP3550/3551 User’s Manual
38
CITIZEN
10.3.6 Electrical Characteristics
(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 to MAX232
RXD
Mark=(-8V) : Stop bit
Space=(+8V): Start bit
DTR
TXD