Standards and certifications
Mobile Panel 7100 User's manual 1.51
123
5.3 Quantitative safety specifications for the stop button and enabling control
device (enabling device)
5.3.1 Stop button:
B&R provides a B
10d
value. B&R cannot provide other values (e.g. SIL, PL, category).
Reason: B&R provides only the switching element, not an evaluation of it. The customer is responsible for connect-
ing the stop button in their application. The way in which the stop button is implemented in the machine determines
the SIL or category with PL for the customer.
The B
10d
value is specified in the user's manual under
5.3.2 Enabling control device with one enable switch (enabling device)
B&R provides a B
10d
value. B&R cannot provide other values (e.g. SIL, PL, category).
Reason: B&R provides only the switching element, not an evaluation of it. The customer is responsible for connect-
ing the enabling control device in their application. The way in which the enabling control device is implemented
in the machine determines the SIL or category with PL for the customer.
The B
10d
value is specified in the user's manual under
"Enabling control device" on page 143
.
5.3.3 Enabling control device with two enable switches (enabling device)
B&R specifies a category and a PL per EN ISO 13849-1 as well as a PFH value and an SIL classification per
EN 61508.
This is because the enabling devices were assessed per EN ISO 13849-1 and EN 61508. There is no B
10d
value for
the enabling device since setup consists of the mechanical element and an electronic evaluation. The electronic
evaluation means that B&R specifies all the enabling devices in the categories with PL, SIL and PFH.
5.3.4 Relationship between performance level and safety integrity level
When assessing safety functions per IEC 61508-1, PL values can be translated into SIL values according to table
4 of standard EN ISO 13849-1:2015.
Performance level (PL) per EN ISO 13849-1
Safety integrity level (SIL) per IEC 61508-1
a
No correspondence
b
1
c
1
d
2
e
3
Table 35: EN ISO 13849-1:2015, table 4 - Relationship between performance level (PL) and safety integrity level (SIL)
Performance level (PL)
Probability of dangerous failure per hour
a
≥10
-5
to <10
-4
b
≥3 x 10
-6
to <10
-5
c
≥10
-6
to <3 x 10
-6
d
≥10
-7
to <10
-6
e
≥10
-8
to <10
-7
Table 36: EN ISO 13849-1:2015, table 3 - Performance levels (PL)