7. INTERFACE
Three interface types are available: parallel, serial
can be used by installing the corresponding PCB.
7.1 Serial Interface (RS-232C or RS-422A)
Item | Specification |
|
|
Data transfer method | Asynchronous serial interface |
Data transfer rate | 2400, 4800, 9600, 19200 |
| Start bit: 1 |
| Data bit: 7 or 8 |
| Odd, even or no parity |
| Stop bit: 1 |
Signal polarity | Mark = logic “1” |
| Space = logic “0” (+3 V to +15V) |
|
|
Connector Pin Assignment
Pin No. | Signal Name | IN/OUT | Function |
|
|
|
|
1 | — | Frame ground | |
2 | TXD | OUT | Transmit data |
3 | RXD | IN | Receive data |
4 | RTS | OUT | Send request signal. There is a space when the printer is |
|
|
| ready to receive. |
5 | CTS | IN | There is a space when the host computer is ready to send. |
|
|
| However, this signal is not checked by the printer. |
6 | N/C |
| Not used |
7 |
| Signal ground | |
8 ~ 10 | N/C |
| Not used |
11 | RCH | OUT | There is a space when the printer is ready to receive. |
|
|
| Same as pin 20. |
12 | N/C |
| Not used |
13 |
| Signal ground | |
14 | FAULT | OUT | There is a mark when an error is occurring in the printer. |
15 | OUT | Send data for multi printer | |
16 | IN | Receive data for multi printer | |
17 ~ 19 | N/C |
| Not used |
20 | DTR |
| Data terminal ready signal. There is a space when the |
|
|
| printer is ready to receive. |
21 ~ 25 | N/C |
| Not used |
|
|
|
|
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