Siemens S7-300 - Application 1: Standard Mode and Application 3: Safety Mode SIL 2 (Category 3)

Digital modules
8.4 SM 326; DI 8 x NAMUR
Fail-safe signal modules
114 Installation and Operating Manual, 01/2010, A5E00085586-10
8.4.4 Application 1: standard mode and application 3: safety mode SIL 2 (Category 3)
Introduction
Below are the wiring scheme and the parameter assignment of SM 326; DI 8 x NAMUR for
● Application 1: standard mode and
● Application 3: Safety mode SIL2/Cat.3/PLd
Diagnostic messages, possible causes of the problem and their corrective measures are
found in tables in the chapter "Diagnostic Messages for SM 326; DI 8 x NAMUR
(Page 121)".
Wiring scheme of applications 1 and 3
One single-channel sensor is connected via one channel to the digital module for each
process signal (1oo1 evaluation). The sensor supply Vs is made available from the digital
module.
/
0
',
9V
9
60
',[1$085
Figure 8-28 Wiring scheme of the SM 326; DI 8 x NAMUR for applications 1 and 3
WARNING
To achieve SIL2/Cat.3/PLd using this wiring, you must use a suitably qualified sensor.
Assignable parameters for applications 1 and 3
Table 8- 10 Parameters SM 326; DI 8 x NAMUR for applications 1 and 3
Range of values in
Parameters
Safety mode Standard mode
Type Effective
range
"Inputs" tab
Enable diagnostic
interrupt
Activated/deactivated Activated/deactivated Static Module
Safety mode Activated Deactivated Static Module
Monitoring time 10 ms to 10000 ms — Static Module
Sensor evaluation 1oo1 evaluation — Static Module
Group diagnostics Activated/deactivated Activated/deactivated Static Channel
"Redundancy" tab
Redundancy None — Static Module