Eaton Crouse-Hinds MEDC SM87BG Manuel Technique page 9

Architectural constraints:
Random hardware failures:
Probability of failure on demand:
Probability of Dangerous failure on safety
function:
Hardware safety integrity compliance
Systematic safety integrity compliance
Systematic Capability
Overall SIL-capability achieved
Conditions of Safe use
The following conditions apply to the installation,
operation and maintenance of the assessed equipment.
Failure to observe these may compromise the safety
integrity of the assessed equipment:
1. The user shall comply with the requirements given
in the manufacturer's user documentation (This
Safety Manual and Technical manual) in regard to all
relevant functional safety aspects such as application
of use, installation, operation, maintenance, proof
tests, maximum ratings, environmental conditions,
repair, etc;
2. Selection of this equipment for use in safety functions
and the installation, configuration, overall validation,
maintenance and repair shall only be carried out by
sM87pB pushbutton
Safety Function of SM87PB Push Button:
'To raise the alarm upon pushing the button'
Type A
HFT= 0
SFF= 79.7%
λ
= 0
DD
λ
= 3.43E-08
DU
PFD = 1.50E-04
AVG
(Low Demand Mode)
PFH = 3.43E-08
(High Demand Mode)
[1]
Call points sM87BG/pB TM146 January 2023 www.eaton.com
Proof Test Interval
=8760Hrs
MTTR = 8 Hrs
λ
= 0
SD
λ
= 1.34E-07
SU
Route 1
H
Route 1
S
SC2
SIL 2 (Low Demand)*
SIL 2 (High Demand)*
*Limited to SIL 2 due to SFF value
competent personnel, observing all the manufacturer's
conditions and recommendations in the user
documentation.
3. All information associated with any field failures
of this product should be collected under a
dependability management process (e.g., IEC
60300-3-2) and reported to the manufacturer.
4. The unit should be tested at regular intervals to
identify any malfunctions; in accordance with this
safety manual.
Call points SM87BG/PB
English
SIL2
SIL3
SIL3
5