Sil - Qualification/ Safety In Accordance With Iec 61508; Sil Qualification; Safety Function - Bartec APEXmpc Operating Instruction And Safety Manual

Safety
2.10 SIL – qualification/ safety in accordance with IEC 61508

SIL qualification

2.11 Safety function

Page 18 of 96
The SIL qualification is only valid for the model
type 07-37A2 - *** 1 / **** (APEX).
Important notes and information on the safe handling of the
product.
During the development of the Ex p control unit APEX, particular attention is paid
to the avoidance of systematic errors as well as the detection and control of
random errors. Here are the most important properties and requirements from
the point of view of functional safety according to IEC 61508:
Internal monitoring of safety-relevant circuit parts
In the event of an error, the safety-relevant outputs go into a defined safe
state
Determination of the failure probability of the defined safety function
Safe parameterisation in an unsafe operating environment
Repeat checks
The SIL qualification of components is documented within this manual. This
chapter summarises all safety-relevant characteristics that users and planners
need for planning and operating the safety-instrumented system. Further SIL
relevant information is included in this manual.
The safety function of the Ex p control unit APEX is characterised by the flushing
with a defined amount of flushing gas, the safe monitoring of the internal
overpressure of the protected equipment and the release of the operation. The
safe state means that in the event of a pressure drop or malfunction, the APEX
control unit changes to the safe state = deactivation of the protected equipment.
The "safe state" is triggered by:
A fall below the minimum pressures within the Ex p equipment
Illogical pressure values within the Ex p equipment
Failure of the supply voltage
If the Ex p APEX control unit does not deactivate the protected equipment or
does not change to the safe state on request or in the event of a fault, a
dangerous failure has occurred.
01-37A2-7D0003_Operating instructions_MPC_20210923_0_en.docx
Ex p control unit
Motor Purge Controller
Rev. 0