Siemens SCALANCE W778-1 Operating Instructions Manual page 47

Licenses on the KEY-PLUG
A C-PLUG only stores information about the configuration of a device. In addition to the
configuration, a KEY-PLUG also contains a license with which you can enable special
functions, for example iFeatures. You will find the article numbers in Accessories (Page 13).
SCALANCE W778-1 /W738-1
Operating Instructions, 01/2107, C79000-G8976-C450-01
5.5 Replacing the PLUG (C-PLUG or KEY-PLUG)
Connection
47