SCALANCE SC-600 
Operating Instructions, 10/2021, C79000-G8976-C453-04 
3 
Table of contents 
1  Introduction .................................................................................................................................................5 
2  Safety notices ........................................................................................................................................... 11 
3  Security recommendations .................................................................................................................... 13 
4  Description of the device ........................................................................................................................ 23 
4.1  Product overview .............................................................................................................................. 23 
4.2  Accessories ....................................................................................................................................... 24 
4.3  Spare parts ........................................................................................................................................ 27 
4.4  Device views ..................................................................................................................................... 28 
4.4.1  Device view of a SCALANCE SC6x2-2C ...................................................................................... 28 
4.4.2  Device view of a SCALANCE SC6x6-2C ...................................................................................... 29 
4.5  LED display........................................................................................................................................ 30 
4.5.1  "RM" LED / "SB" LED ..................................................................................................................... 30 
4.5.2  "F" LED ............................................................................................................................................... 30 
4.5.3  LEDs "DM1" and "DM2" ................................................................................................................. 31 
4.5.4  LEDs "L1" and "L2" .......................................................................................................................... 31 
4.5.5  Port LEDs ........................................................................................................................................... 32 
4.6  SELECT/SET button ........................................................................................................................ 34 
4.7  C-PLUG/KEY-PLUG ........................................................................................................................ 37 
4.7.1  Function of the C-PLUG/KEY-PLUG ........................................................................................... 37 
4.7.2  Replacing the C-PLUG/KEY-PLUG .............................................................................................. 38 
4.8  Combo ports ...................................................................................................................................... 40 
5  Installation ................................................................................................................................................ 41 
5.1  Safety notices for installation ........................................................................................................ 41 
5.2  Types of installation ........................................................................................................................ 44 
5.2.1  Mounting on DIN rails ..................................................................................................................... 45 
5.2.2  Installation on a standard S7-300 rail .......................................................................................... 46 
5.2.3  Installation on a standard S7-1500 rail ....................................................................................... 47 
5.2.4  Wall mounting ................................................................................................................................... 48 
5.2.5  Changing the position of the securing bar .................................................................................. 49 
6  Connecting ................................................................................................................................................ 51 
6.1  Safety when connecting up ............................................................................................................ 51 
6.2  Wiring rules ....................................................................................................................................... 53 
6.3  Power supply ..................................................................................................................................... 54 
6.4  Signaling contact .............................................................................................................................. 
56 
6.5  Digital input ....................................................................................................................................... 58 
6.6  Serial interface ................................................................................................................................. 60