The S7-300/400PLC Programming adapters cable with isolated RS232 interfaces, RS232/MPI isolation, with communication indicator, to replace products: 6 ES7 972-0CA23-0XA0, The communications rate of PC port is 19.2Kbps115.2Kbps and can be automatically adapted, the communications rate of MPI port is 187.5Kbps and 19.2 Kbps and can be automatically adapted too. Can use PC / MPI + to connect PLC and the touch-screen of third-party manufacturers for communications.
Characteristics and main technical parametres:
- Power: It is supplied by the 24VDC MPI port of PLC, power consumption of about 1w, with overcurrent protection and surge protection.
- Isolation Voltage: 1000VDC(Maximun to 3000 VDC, orders require statement.)
- RS232 port has anti-surge protection, RS485 port has anti-lightning protection and overcurrent protection with the consumption of 500w.
- RS232 port baud rate: 19.2Kbps---115.2Kbps, automatically adaptable to the standard baud rate.
- MPI port baud rate: 187.5Kbps---19.2Kbps, automatically adaptable.
- Supporting the connection of PLC to touch-screen communication with the third party.
- With a power indicater light, on-line and data transmission indicater light.
- Working temperature: -2075
- Dimension: 103×50×26; After connecting the RS232 cables: 5.5m.
RS232 adapter port and port-pin RS485 signal definations:
RS232-Block(DB9M) defination signals RS485-Block(DB9M) defination signals
Pin number | Signal name | Instructions |
| Pin number | Signal name | Instructions |
1 | DCD | No use | 1 | NC | No use | |
2 | RXD | RS232 signal reception | 2 | M24V | Negtive 24VDC power | |
3 | TXD | RS232 signal sending | 3 | B | RS485 positive signal | |
4 | DTR | Short circuit with No.6 | 4 | RTSAS | Data reception control | |
5 | GND | RS232 signal to ground | 5 | GND | RS485 signal to ground | |
6 | DSR | Short cut with No.4 | 6 | NC | No use | |
7 | RTS | Sending requsts | 7 | P24V | 24VDC positive power | |
8 | CTS | Sending clear | 8 | A | RS485 negtive signal | |
9 | RI | No use | 9 | RTS_PG | Data-send control |
Instructions of the indicater light
Indicater light | On | Qlittering | Out |
Power | Normal | Error | Error or failing to link to power |
Active | Online | Transmission of data | Not online |
Tx | Error | Send data | No data transmission |
Detailed information see the official website of Seawens:seawens.com