TELEDYNE OLDHAM SIMTRONICS MX32 - Functional Safety and Usage Conditions; Reliability Data and SIL Certification; Specific Conditions for Safe Use

MX32v2
ANALOG AND DIGITAL CONTROLLER
USER MANUAL
NP32V2EN
Revision D.0
77
13 Specific conditions of use and
Functional Safety
13.1 Reliability data
The MX32v2 controller is certified according to the European standard EN
50271:2010 “Electrical apparatus for the detection and measurement of combustible gases,
toxic gases or oxygen. Requirements and tests for apparatus using software and/or digital
technologies”.
Concerning the requirements relative to the software development process, standard EN
50271 specifies a practical approach in order to satisfy the requirements of EN 61508-3 for
the safety integrity level SIL 1.
The French Notified Body INERIS certified that the MX32v2 controller conforms to the
necessary requirements and level SIL 1.
Configuration
MTBF
(years)
SFF
PFD
avg
SIL
maximum
1 line version 28.6 60%
7.10.10
-3
1
2 line version 27.1 60%
7.48.10
-3
1
Wheatstone
bridge version
25.3 60%
8.02.10
-3
1
Ti: 12 months
Mean Time to Repair (MTTR): 48 hours
Recommended operating life: 20 years
13.2 Specific Conditions of Use
The safety function of the MX32v2 is the processing of the signal of the detectors linked to its
input. As soon as a measurement reaches a programmed threshold, an audio and visual alarm
goes off. Simultaneously, the possible corresponding alarm relay(s) is (are) activated,
commanding additional internal or external actions set forth by the user.