Oldham MX62, Руководство пользователя

Страница: 69 / 74

Page 69
14. Requirements for Functional Safety (SIL)
This chapter describes the requirements for the installation of the gas detection
system WinPro

/ MX62 in safety related applications.
14.1. Basics
Functional safety considers only aspects to avoid or control the disturbance of
the normal system functionality.
The normal operation is not part of this consideration. For normal operation,
please refer to other chapters of this manual and the manuals of the connected
detectors.
14.2. Operation in safety related systems according EN 61508
The WinPro

/ MX62 is designed for operation in safety related applications
with requirements for functional safety including SIL 3 capability according EN
61508. Basis for the evaluation of WinPro

/ MX62 is the EN 50402 for
functional safety of fixed gas detection systems.
Following is given a planning aid for the integration of WinPro

/ MX62 in a
safety related system:

Definition of safety related functions

Definition of proof tests (T1) for safety related functions

Requirements for configuration of WinPro

/ MX62

Failure rates of WinPro

/ MX62 (PFD values); for use in failure rate
calculations of a safety related system according EN 61508

Directions for operation in safety related applications
14.3. Definition of safety functions
The gas detection system WinPro

/ MX62 with its safety related functions is
only part of a safety related system.
The safety related function of WinPro

/ MX62 starts at the signal inputs of the
analog input module (AEM) and ends at the relay outputs of the gas detection
system (RBM/REM). The signal processing chain consists of analog input
module, controller module (CM), relay module and the communication lines
between these modules.
The WinPro

/ MX62 provides different safety related und non-safety related
outputs:
Safety related outputs (relays):