Digital Modules

4-71

S7-400, M7-400 Programmable Controllers Module Specifications
A5E00069467-07
Terminal Assignment and Block Diagram of the SM 422; DO 32 24 VDC/0.5 A
L+
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M
1L+
2L+
2L+
3L+
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4L+
4L+
3L+
2L+
4L+
1L+
M
Data register and bus control
LED control
Process Module

Figure 4-17 Terminal Assignment and Block Diagram of the SM 422; DO 32 24 VDC/0.5 A