Interface characteristics
- Serial data transmission in asynchronous mode,
- Bidirectional data transmission on two separate lines,
- Transmission rate selectable from 110 to 115200 baud,
- Logical 0 signal from +3 V to +15 V,
- Logical 1 signal from -15 V to -3 V,
- Hardware handshake RTS/CTS or software handshake
XON/XOFF available.
Pin assignment of the RS-232-C interface
| Designation |
Abbreviation |
Pin (9-pin male) |
Pin (25-pin male) |
| Data Carrier Detect |
DCD |
1 |
8 |
| Receive Data |
RxD |
2 |
3 |
| Transmit Data |
TxD |
3 |
2 |
| Data Terminal Ready |
DTR |
4 |
20 |
| Signal Ground |
GND |
5 |
7 |
| Data Set Ready |
DSR |
6 |
6 |
| Request To Send |
RTS |
7 |
4 |
| Clear To Send |
CTS |
8 |
5 |
| Ring Indicator |
RI |
9 |
22 |