Siemens SIMATIC Manual page 175

3.29 Digital output module SM 322; DO 8 x DC 24 V/ 0.5 A; with diagnostics interrupt; (6ES7322-8BF00-0AB0)
Wiring and block diagram of SM 322; DO 8 x DC 24 V/ 0.5 A
①
②
③
④
⑤
Figure 3-9
Redundant load control
The output with series diode can be used for redundant load control. Redundant control
without external circuitry is possible using two different signal modules. Both modules must
be connected to the common reference potential M.
Note
It is not possible to detect external short-circuits to L+ at output with series diode.
S7-300 Module data
Manual, 06/2017, A5E00105505-AJ
Group error display -red-
Channel number (0 ... 7)
Channel fault display -red- (F0 ... F7)
Status display -green-
Backplane bus interface
Wiring and block diagram of SM 322; DO 8 x 24 V DC / 0.5
Digital modules
175