Siemens Simatic M7-400 - Terminal Assignment and Block Diagram of the SM 421; DI 16 X 24 VDC; Terminal Assignment and Block Diagram of the SM 421; DI 32 X 24 VDC

Digital Modules
4-21
S7-400, M7-400 Programmable Controllers Module Specifications
A5E00069467-07
Terminal Assignment and Block Diagram of the SM 421; DI 32 24 VDC
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Process
Data register and bus control
Module
M
Figure 4-3 Terminal Assignment and Block Diagram of the SM 421; DI 32 24 VDC