VPN tunnel between SCALANCE M-800 and S612 
  3.2 Secure VPN tunnel with PSK 
SCALANCE M-800 Getting Started 
Getting Started, 06/2015, C79000-G8976-C337-04 
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8.  Enter the values assigned to the M-800 from the "Settings used (Page 91)" table. 
 
9.  Close the dialog with "OK". 
The security module S612 and the SCALANCE M-800 will then be displayed in the list of 
configured modules.