Upkeep and maintenance 
  7.3 Downloading new firmware using TFTP without WBM and CLI 
SCALANCE XR-500 
Operating Instructions, 05/2017, A5E03275845-11 
79 
3.  Pull the filter frame out of the housing pulling on the strap of the filter frame ③. 
 
Figure 7-4  Changing the filter pad of a SCALANCE XR552-12M SCALANCE XR528-6M is used 
analogously. 
4.  Remove the filter pad. 
5.  Clean or replace the filter pad. 
6.  Insert the cleaned or new filter mat in the filter frame. 
7.  Insert the filter frame in the compartment again. 
8.  Close the cover and lock it by pushing the catch from right to left with a slotted 
screwdriver. 
 
Downloading new firmware using TFTP without WBM and CLI 
Firmware 
The firmware is signed and encrypted. This ensures that only firmware created by Siemens 
can be downloaded to the device. 
Procedure with Microsoft Windows 
Using TFTP, you can supply a device with new firmware even when it cannot be reached 
using WBM or CLI. This section explains the procedure based on the example of Microsoft 
Windows.