Citizen Systems CBM-920 manual Connector Connection Diagram, DTR Data Terminal Ready

CBM-920 User’s Manual

6.2Connector Connection Diagram

PIN	SIGNAL NAME	PIN	SIGNAL NAME
1 ~ 8	N.C (not connected)	15	GND
9	R ⋅ D	16	FG
10	T ⋅ D	17	+5V(for circuit)
11	DTR	18	GND
12	PE	19	+5V(for mechanism)
13		20	GND
	FAULT
14
	RESET

6.3Explanation of Input/Output Signals

1)I/O Signals into Printer (RS-232C)

•T ⋅ D (TRANSMIT DATA) Serial transmit data signals.

•R ⋅ D (RECEIVE DATA) Serial received data signals.

• DTR (DATA TERMINAL READY)

When this signal is in Ready (space), send data or a command.

If sending takes place in Busy (mark), overrun error is occurred.

Even in printing, data can be sent into the input buffer. If this signal is in Ready.

Further, Busy takes place also on supply of power, in test printing, on-line status or on occurrence of resetting.

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