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iDP-3540/41 User’s Manual
CITIZEN 28/48
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