Citizen Systems iDP-3540, 3541 user manual 8V Busy TD Mark = -8V +8V Ready Space = +8V

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iDP-3540/41 User’s Manual

9-3-6. Electrical Characteristics

a)RS-232C Circuit Input (RD)

[Printer Side]

[Host Side]

MAX232 or equivalent	Mark = (-8V): Stop bit
	Space = (+8V): start bit
Output (DTR, TD, FAULT)
[Printer Side]	[Host Side]

	MAX232 or equivalent
DTR	(-8V): BUSY	*TD Mark = (-8V): 1
	(+8V): READY	Space = (+8V): 0
FAULT	(-8V): Normal
	(+8V): Abnormal

b)TTL Circuit Output (PE)

[Printer Side]

[Host Side]

	7406 or equivalent
PE	H: Paper empty
	L: Paper remaining
Input (RESET)
	[Printer Side]	[Host Side]

7406 or equivalent

LOW for RESET

CITIZEN

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Contents User’s Manual LVD EMCImportant Safety Instructions Contents Slide Switch Setting Serial interface specifications only Introduction Basic Specifications Specifications Citizen Block Diagram External Appearance and parts Description 12/48 13/48 Preparation IDP-3540/41 User’s Manual Ribbon Cassette Installation 16/48 17/48 Input Buffer Back-up Function Input Buffer Back-upParallel Interface Data FaultACK 21/48 22/48 Serial Interface TTL DTR25/48 26/48 27/48 8V Busy TD Mark = -8V +8V Ready Space = +8V Current on Ready External Output Function Selection IDP-3540/41 User’s Manual RS-422A type only Function Print Control Functions SO0EH FF0CHSI0FH LF0AH CR0DHRS1EH 37/48 38/48 39/48 40/48 DEFAULT=20 42/48 Initial Setting Maintenance General CautionsCharacter Code Tables IDP-3540/41 User’s Manual Individual Country Character Codes External Dimensions IDP-3540/41 User’s Manual Model iDP3541