Siemens S7-300 Installation And Operating Manual page 164

Digital modules
8.7 SM 326; F-DO 10 x DC 24V/2A PP (6ES7326-2BF10-0AB0)
Wiring and block diagram
The following figure shows the wiring and block diagram of SM 326; F-DO 10 x DC 24V/2A
PP.
Figure 8-52
The potential groups 1L+, 2L+ and 3L+ can be supplied by separated power supply units but
also by one common power supply unit.
Channel numbers
The channel numbers are used to identify the outputs and to assign channel-specific
diagnostic messages.
Figure 8-53
164
Wiring and block diagram of SM 326; F-DO 10 x DC 24V/2A PP
Channel numbers for SM 326; F-DO 10 x DC 24V/2A PP
Installation and Operating Manual, 01/2010, A5E00085586-10
Fail-safe signal modules