Siemens SIMATIC TOP connect Manual page 92

Circuit diagrams
B.1 Front connector modules S7-300
①
②
Figure B-2
Front connector module 6ES7921-3AA00-0AA0 / 6ES7921-3AB00-0AA0
For S7-300 / ET200M, digital 2 x 8 I/O
Front connector module with potential supply
Connecting terminals in
Spring-loaded terminal system: 6ES7921-3AA00-0AA0
Screw-type system: 6ES7921-3AB00-0AA0
Figure B-3
Front connector module 6ES7921-3AA20-0AA0 / 6ES7921-3AB20-0AA0
For S7-300 / ET200M, digital 4 x 8 I/O
Front connector module with potential supply
92
Digital part
Analog part
6ES7921-3AM20-0AA0
6ES7921-3AA00-0AA0 / 6ES7921-3AB00-0AA0
System cabling for S7-300
Manual, 09/2018, 70327045899