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Citizen Systems iDP3420 User Manual

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iDP3420/3421/3423 User’s Manual

34

CITIZEN

(7) RTS

This signal is turned to Space when the printer is turned on.

(8) RCH

When the printer is ready to receive, this signal is turned to Space.

This signal line is the same as

DTR.

(9) mTXD

TXD signal for the diode gate.

(10) mRXD

RXD signal for the diode gate.

(11) FG

This is a Frame Ground signal.

(12) GND

This is a common ground on the circuit.