See chapter Dimensions and weight (Page 31)
CAD data that can be downloaded from the Internet:
6EP1961-2BA00
(http://www.automation.siemens.com/bilddb/index.aspx?objKey=G_KT01_XX_00575
)
6EP1961-2BA11
(http://www.automation.siemens.com/bilddb/index.aspx?objKey=G_KT01_XX_00423
)
6EP1961-2BA21
(http://www.automation.siemens.com/bilddb/index.aspx?objKey=G_KT01_XX_00427
)
6EP1961-2BA31
(http://www.automation.siemens.com/bilddb/index.aspx?objKey=G_KT01_XX_00742
)
6EP1961-2BA41
(http://www.automation.siemens.com/bilddb/index.aspx?objKey=G_KT01_XX_00745
)
6EP1961-2BA51
(http://www.automation.siemens.com/bilddb/index.aspx?objKey=G_KT01_XX_01240
)
6EP1961-2BA61
(http://www.automation.siemens.com/bilddb/index.aspx?objKey=G_KT01_XX_01241
)