Electrical Characteristics - Citizen iDP3420 User Manual

10.3.6 Electrical Characteristics

(1) RS-232C circuit
Input (RXD, DSR, mRXD)
Output (DTR, TXD, mTXD, RCH, RTS, FAULT)
DTR
(2) Others
RESET
PE
GND
FG
[Printer Side]
Equivalent MAX232
Equivalent to MAX232
Mark=(-8V): At Busy
Space=(+8V): At Ready
: A signal to reset the entire printer.
: A signal to show that the paper has run out.
to the "HIGH" level when the paper has run out.
: Signal ground
: Frame ground
Mark=(-8V) : Stop bit
RXD
Space=(+8V): Start bit
Mark=(-8V): 1
TXD
Space=(+8V): 0
Normal at the "LOW" level, but turned
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iDP3420/3421/3423 User's Manual
[Host Side]
CITIZEN