Adata SP300 Specifications download pdf (Page 14)

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2-3. Connectors and Signals

RS-232C

Pin no. Signal name

I/O

Function

direction

1 F-GND — Frame ground

2 TXD OUT Transmitted data

3 RXD IN Received data

4 RTS OUT Data transmission request signal. This is al-

ways “SPACE” when the printer is turned on.

5 CTS IN This signal changes to “SPACE” when

host computer is ready to transmit data. (In

this instance, the printer does not check this

signal.)

6 N/C Not connected

7 S-GND — Signal ground

8 N/C Not connected

9-10 N/C This pin is used when using the optional

interface board.

11 RCH OUT This signal changes to “SPACE” when the

printer is ready to receive data. (The signal

line is same as pin 20.)

12 N/C Not connected.

13 S-GND — Signal ground

14 FAULT OUT When printer error occurs (such as paper

out, mechanical error, etc.), this signal is

set to “MARK”.

Multi-printer TXD

OUT Diode coupled TXD

Multi-printer DTR

OUT Diode coupled DTR

17 to 19 N/C This pin is used when using the optional

interface board.

20 DTR OUT Data terminal ready signal. When the printer

is ready to receive data, this signal changes

to “SPACE”.

21-22 N/C Not connected

23 to 25 N/C This pin is used when using the optional

interface board.

Fig. 2-4 Serial interface connector

1 2 ... 9 10 11 12 13 14 15 16 17 18 19 ... 69 70

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Adata SP300 Specifications Page 14