USB/PPI cable is suitable for the Siemens S7-200 full range of PLCs. It is a programming cable that provides serial connection and RS485 signal conversion and PPI protocol conversion via USB interface.
The driver control running in the computer simulates the USB interface of the computer into a traditional serial port (commonly known as the COM port), thereby using various existing programming software, communication software, and monitoring software. The working power is taken from the USB port and is not powered by the programming port of the PLC. The two-color LED on the converter box indicates the data transmission and reception status. For industrial sites with high interference and easy to damage the communication port, opto-isolated USB/PPI+ programming cable is selected.
USB/PPI cable characteristics and technical indicators:
1. Support USB/PPI operating system: Windows2000/WindowsXP (WinNT4/95/98/Me/DOS is not supported)
2. Support USB/PPI programming software version: STEP7 Micro/WIN V3.2 and above
3. Fully compatible with USB V1.1 and USB CDC V1.1 specifications
4.USB bus power supply, current consumption is about 50mA
5. Baud rate: 9.6kbps standard baud rate automatically adapts
6. Support UART data format
7. Data bits: 8
8. Stop bits: 1, 2
9. Check digit: odd/even/no parity
10. Support the maximum communication distance of 2KM (9600bps)
11. Only one USB programming cable is supported per PC
USB/PPI cable usage:
The USB/PPI programming cable needs to be installed with the USB device driver. These drivers are included on the CD that ships with the product. For the installation method, please refer to the documentation on the driver CD, which will not be described here.
After the driver installation is completed, the COM port corresponding to the USB/PPI programming cable will appear in the device manager of Windows. Simply select the COM port in the programming software or other application software, and the next use is the same as the traditional RS232. The port programming cable is identical. It should be noted here that the programming cable does not support the “USB” option of the local communication port setting in the programming software.
USB/PPI cable long distance communication:
The maximum communication distance between the USB/PPI programming cable and the PLC can reach 2KM (9600bps). In this case, a 120Ω termination resistor should be connected between the 3rd and 8th pins of the RS485 port of the cable (DB9 Male) to eliminate signal reflection. The PFB-G bus isolator is installed on the PLC side, and the communication line adopts a shielded twisted pair with a cross-sectional area of 0.22 mm2 or more. More than 2000 meters distance can be added to the bus to add RS485 repeater to extend the communication distance.
PLC Cable 