Citizen Systems iDP-3421, iDP-3420, iDP-3423 user manual ·Reset, ·Pe, ·Gnd, ·Fg

iDP-3420/3421/3423 User’s Manual

10.3.6Electrical Characteristics

(1)RS-232C circuit

Input (RXD, DSR, mRXD)

[Printer Side] [Host Side]

Mark=(-8V): Stop bit

RXD

Equivalent MAX232

Output (DTR, TXD, mTXD, RCH, RTS, FAULT)

Space=(+8V): Start bit

	Equivalent to MAX232
DTR	Mark=(-8V): At Busy	Mark=(-8V): 1
	TXD	Space=(+8V): 0
	Space=(+8V): At Ready
(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

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