Application 1: Standard Mode, Application 3: Safety Mode Sil2/Cat.3/Pld And Application 5: Safety Mode Sil3/Cat.4/Ple - Siemens S7-300 Installation And Operating Manual

Digital modules
8.6 SM 326; DO 10 x DC 24V/2A (6ES7326-2BF01-0AB0)
8.6.3 Application 1: Standard mode, application 3: Safety Mode SIL2/Cat.3/PLd and
application 5: Safety mode SIL3/Cat.4/PLe
Introduction
Below are the wiring scheme and the parameter assignment of SM 326; DO 10 x DC 24V/2A
for
● Application 1: standard mode,
● Application 3: Safety mode SIL2/Cat.3/PLd and
● Application 5: Safety mode SIL3/Cat.4/PLe.
Diagnostic messages, possible causes of the problem and their corrective measures are
found in tables in the chapter "Diagnostics messages of SM 326; DO 10 x DC 24V/2A
(Page 152)".
Note
In case of parameter setting with SIL3
The signal at the output has to change daily or even more frequently. If this is not the case
with the "0" signal, you will have to activate the light test that meets this condition.
Wiring scheme for applications 1, 3 and 5
Single-channel connection of one sensor for each process signal. The load voltage supply is
wired to terminals 2L+/2M, 3L+/3M of the digital module.
Figure 8-45
It is no longer possible to shut down an actuator if a cross circuit has developed between
2L+ and DO. To prevent cross circuits between 2L+ and DO, you must route the cables
used to connect the actuators between the two signal groups (channels 0 - 4 and channels
5 - 9) in a cross-circuit-proof manner (for example, as separate, sheathed cables or in
separate cable ducts).
146
Wiring scheme of the SM 326; DO 10 x DC 24V/2A for applications 1, 3 and 5
WARNING
Installation and Operating Manual, 01/2010, A5E00085586-10
Fail-safe signal modules