Table of contents
3TK28 safety relays
6 Manual, 07/2016, NEB926157502000/RS-AB/003
3.8.2 3TK2850 / 3TK2851 / 3TK2852 safety relay......................................................................142
3.8.2.1 Applications......................................................................................................................142
3.8.2.2 Description of function and connection information ...........................................................142
3.8.2.3 Structure 3TK285 .............................................................................................................143
3.8.2.4 Terminal assignment ........................................................................................................144
3.8.2.5 Display of the operating state ...........................................................................................145
3.8.2.6 State diagrams 3TK2850 / 3TK2851 / 3TK2852 ................................................................146
3.8.2.7 Technical data 3TK2850 / 3TK2851 / 3TK2852 .................................................................147
3.8.2.8 Connection examples 3TK2850 / 3TK2851 / 3TK2852 ......................................................156
3.8.3 3TK2853 safety relay .......................................................................................................158
3.8.3.1 Applications......................................................................................................................158
3.8.3.2 Description of function and connection information ...........................................................158
3.8.3.3 Structure 3TK2853 ...........................................................................................................159
3.8.3.4 Terminal assignment ........................................................................................................160
3.8.3.5 Display of the operating state ...........................................................................................161
3.8.3.6 State diagrams 3TK2853 ..................................................................................................162
3.8.3.7 Technical data 3TK2853 ...................................................................................................163
3.8.3.8 Connection examples 3TK2853 ........................................................................................166
3.8.4 3TK2856 / 3TK2857 safety relays .....................................................................................171
3.8.4.1 Applications......................................................................................................................171
3.8.4.2 Description of function and connection information ...........................................................171
3.8.4.3 Structure 3TK2856/57 ......................................................................................................172
3.8.4.4 Terminal assignment ........................................................................................................173
3.8.4.5 Display of the operating state ...........................................................................................174
3.8.4.6 State diagrams 3TK2856 / 3TK2857 .................................................................................175
3.8.4.7 Technical data 3TK2856 / 3TK2857 ..................................................................................176
3.8.4.8 Connection examples 3TK2856 / 3TK2857 .......................................................................179
4 Mounting ................................................................................................................................... 183
4.1 Warning notices ...............................................................................................................183
4.2 Mounting the device on a DIN rail .....................................................................................184
4.3 Mounting the device on a level surface .............................................................................185
4.4 Disassembling the device .................................................................................................186
5 Connection ................................................................................................................................ 189
5.1 Connection data for terminal blocks ..................................................................................189
5.2 Connecting terminal blocks ...............................................................................................190
5.3 Disconnecting ..................................................................................................................192
5.4 Plugging in terminal blocks ...............................................................................................194
6 Dimension drawings ................................................................................................................... 195
6.1 Dimension drawings 3TK28 ..............................................................................................195
7 Accessories............................................................................................................................... 205
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