Citizen Systems CBM1000 user manual Appendix 5. Serial Interface, Specifications

APPENDIX 5. SERIAL INTERFACE

1 Specifications
(1)	Synchronizing system:	Asynchronous
(2)	Baud rate :	4800, 9600, 19200 or 38400 bps (User selectable)
(3)	Configuration of one word
	Start bit:	1 bit
	Data bits:	7 or 8 bits (User selectable)
	Parity bit:	Odd, even, or none (User selectable)
	Stop bit:	1 bit or more
	Transmission control:	DTR/DSR or XON/XOFF control (User selectable)

2 Connector Pin Assignments

Host side

D-Sub 9 pin (Female)

Pin No.	Signal name
Case	FG
2	RXD
3	TXD
8	CTS
4	DTR
5	GND
6	DSR

Printer side

D-Sub 25 pin (Male)

Pin No.	Signal name
1	FG
2	TXD
3	RXD
4	RTS
6	DSR
7	GND
20	DTR

3. Connector Pin Configuration

NO.	Signal name	I/O	Function
1	FG		Grounding for safety (Case ground)
2	TD	Output	Transferred data
3	RD	Input	Received data
4	RTS	Output	Same as DTR
6	DSR	Input	Data set ready or reset (Selected with the DIP switches)
7	GND		Ground for signals (Common ground on the circuit)
20	DTR	Output	Printer Busy signal
25	INIT	Input	Reset (Selected with the DIP switches)
Applicable connectors (D-Sub connectors)
	Printer side:	17LE-13250 (DDK or equivalent)
	Cable side:	17JE-23250 (DDK or equivalent)

	CAUTION
•	Signals for RS-232C are specified based on EIA RS-232C.
•	While data is not being transferred, be sure to maintain the received data in a mark state.	APPENDIX

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