Application 1: Standard Mode And Application 3: Safety Mode Sil 2 (Category 3) - Siemens S7-300 Installation And Operating Manual

Digital modules
8.4 SM 326; DI 8 x NAMUR
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.
Figure 8-28
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
"Inputs" tab
Enable diagnostic
interrupt
Safety mode
Monitoring time
Sensor evaluation
Group diagnostics
"Redundancy" tab
Redundancy
114
Wiring scheme of the SM 326; DI 8 x NAMUR for applications 1 and 3
WARNING
Parameters SM 326; DI 8 x NAMUR for applications 1 and 3
Parameters Range of values in
Safety mode
Activated/deactivated
Activated
10 ms to 10000 ms
1oo1 evaluation
Activated/deactivated
None
Standard mode
Activated/deactivated
Deactivated
—
—
Activated/deactivated
—
Installation and Operating Manual, 01/2010, A5E00085586-10
Type Effective
range
Static Module
Static Module
Static Module
Static Module
Static Channel
Static Module
Fail-safe signal modules