The X22 serial interface (RS232) is a critical component of the Sinamics S120 Drive. This interface is responsible for the transmission and reception of data, playing a vital role in the drive's operation. This guide will provide a detailed explanation of how to use the X22 serial interface, including the function of each pin.

Understanding the X22 Serial Interface (RS232)

The X22 serial interface (RS232) is a 9-pin SUB D connector. Each pin in the interface has a specific function and technical data associated with it. Here's a breakdown of each pin:

• Pin 1: Reserved, do not use
• Pin 2 (XRXD_RS232): This pin is used for receiving data.
• Pin 3 (XTXD_RS232): This pin is used for transmitting data.
• Pin 4: Reserved, do not use
• Pin 5 (GND): This pin is used for grounding.
• Pin 6: Reserved, do not use
• Pin 7: Reserved, do not use
• Pin 8: Reserved, do not use
• Pin 9: Reserved, do not use

The maximum data rate for the X22 serial interface is 120 kBaud at a load capacity of 1.0 nF and 20 kBaud at a load capacity of 2.5 nF.

Using the X22 Serial Interface (RS232)

To use the X22 serial interface, you'll need to connect the appropriate cables to the corresponding pins. Remember, the pins marked as "Reserved, do not use" should be left unconnected.

When transmitting data, ensure that your data is sent through Pin 3 (XTXD_RS232). Conversely, when receiving data, the data will come through Pin 2 (XRXD_RS232). Pin 5 (GND) should be connected to the ground.

Conclusion

Understanding how to use the X22 serial interface (RS232) in a Sinamics S120 Drive is crucial for the effective operation of the drive. By knowing the function of each pin and how to use them, you can ensure that your drive operates efficiently and effectively.

Remember, always consult the detailed instructions provided in the manual or other documentation by Siemens for any maintenance or replacement procedures. If you need clarification at any stage in the process, it's best to consult with a professional or the manufacturer's support team.