Citizen Systems iDP3420 Manuel D’Utilisation
iDP3420/3421/3423 User’s Manual
37
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 MAX232
RXD
Mark=(-8V) : Stop bit
Space=(+8V): Start bit
DTR
TXD