Description of the device   
3.4 C-PLUG / KEY-PLUG 
  SCALANCE XR-500 
34  Operating Instructions, 05/2017, A5E03275845-11 
Inserting a C-PLUG/KEY-PLUG that does not contain the configuration of a compatible 
device type, accidentally removing the C-PLUG/KEY-PLUG or general malfunctions of the C-
PLUG/KEY-PLUG are signaled by the diagnostics mechanisms of the device (LEDs, Web-
based management (WBM), SNMP, Command Line Interface (CLI) and PROFINET 
diagnostics). 
The user then has the choice of either removing the C-PLUG/KEY-PLUG again or selecting 
the option to reformat the C-PLUG/KEY-PLUG. 
 
Removal and insertion of the C-PLUG/KEY-PLUG 
 
Do not remove or insert a C-PLUG/KEY-PLUG during operation 
A C-PLUG/KEY-PLUG may only be removed or inserted when the device is turned off. 
Position of the C-PLUG/KEY-PLUG with rack devices 
 
 
On a SCALANCE XR524-8C and SCALANCE XR526-8C, 
the slot is below a cover on the left-hand side of the hous-
ing. 
On a SCALANCE XR528-6M and SCALANCE XR552-12M, 
the slot is below a cover on the right-hand side of the hous-
ing. 
After undoing the screw (screw head Torx T10), you can 
remove the cover plate and the slot is accessible. 
Removing a C-PLUG/KEY-PLUG 
 
1.  Turn off the power to the device. 
2.  Remove the cover. 
3.  Insert a screwdriver between the front edge of the C-
PLUG/KEY-PLUG (position A) and the slot and release 
the C-PLUG/KEY-PLUG. 
4.  Remove the C-PLUG/KEY-PLUG and screw the cover 
plate firmly in place again.