Siemens S7-300 Installation And Operating Manual page 129

Wiring and block diagram
The following figure shows the wiring and block diagram of SM 326; DO 8 x DC 24V/2A PM.
Figure 8-34 Wiring and block diagram of SM 326; DO 8 x DC 24V/2A PM
Channel numbers
The channel numbers are used to identify the outputs and to assign channel-specific
diagnostic messages.
Figure 8-35
Fail-safe signal modules
Installation and Operating Manual, 01/2010, A5E00085586-10
Channel numbers for SM 326; DO 8 x DC 24V/2A PM
Digital modules
8.5 SM 326; DO 8 x DC 24V/2A PM
129