Description

The USB-PPI is a communication cable designed for interfacing with Siemens S7-1200 and S7-
200 PLCs using a USB port. It connects a computer (typically a PC or laptop) to the PLC via the
USB interface, allowing for programming, configuration, and diagnostics.
Key features of the USB-PPI include:
1. USB Interface: It connects directly to a PC’s USB port, eliminating the need for older
serial ports (RS-232) that were typically used for communication with Siemens PLCs.
2. PPI Protocol: The cable operates using the PPI (Point-to-Point Interface) protocol,
which is used by Siemens for communication with certain PLCs in the S7-200 series and
earlier. This protocol allows for data exchange between the PLC and the connected PC
for program uploads, downloads, and monitoring.
3. Compatible Software: The USB-PPI cable is used with Siemens programming software,
such as Step 7 MicroWin (for S7-200) and Step 7 Basic (for S7-1200), enabling users to
configure and program the PLCs.
4. Simple Setup: It typically comes with the necessary drivers and installation instructions,
making it easy to set up and use for users working with Siemens PLCs.
5. Support for Older Models: While it’s compatible with S7-1200 and S7-200, it’s
especially useful for those working with older Siemens PLC models that rely on the PPI
protocol for communication.
The USB-PPI cable is crucial for professionals who need to interface with Siemens PLCs in a
straightforward, cost-effective way, without requiring older or more complex communication
methods