Siemens Simatic M7-400 - Page 474

M7-400 Expansions
12-4
S7-400, M7-400 Programmable Controllers Module Specifications
A5E00069467-07
e.g. FM 456-4
e.g. EXM 478 e.g. ATM 478e.g. MSM 478
Figure 12-2 Maximum Expansion with Expansion Modules