ABB 266 HART Series Operating Instruction Download

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2600T Series Pressure transmitters |

OI/266/HART-EN Rev. D 71

Safety philosophy

The 266 Pressure Transmitters are field devices designed according to the requirements of the standard IEC61508 for the Safety
Related Systems. Standard currently used focus on individual parts of all the safe instrumentation used to implement a safety
function. The IEC61508 defines requirements related to all the system that normally comprises initiating devices, logic solver and
final elements. It also introduces the concept of Safety lifecycle defining the sequence of activities involved in the implementation
of the safety instrumented system from conception through decommissioning. For a single component it is not correct to define
a SIL level. The term SIL (Safety Integrity Level) refers to the complete safety loop therefore the single device shall be designed in
order to be suitable to achieve the desired SIL level in the entire Safety Loop.

Application

The 266 Pressure Transmitters are intended to be applied for safety relevant application in the process industry. They are suitable
to be used in SIL2 applications when applied as single channel and in SIL3 applications when applied with a double channel with
architecture 1oo2. Special attention has to be given to the separation of safety and non safety relevant use.

Physical environment

The transmitters are designed for use in industrial field environments and must be operated within the specified environmental
limits as indicated in the Transmitter Data Sheet.

Role and responsibilities

All the people, departments and organizations involved in the life-cycle phases which are responsible for carrying out and
reviewing the applicable overall, E/E/PES (Electrical/Electronic/ Programmable Electronic System) or software safety lifecycle
phases of a Safety Instrumented System shall be identified. All those specified as responsible for management of functional
safety activities shall be informed of the responsibilities assigned to them. All persons involved in any overall, E/E/PES or
software safety lifecycle activity, including management activities, should have the appropriate training, technical knowledge,
experience and qualifications relevant to the specific duties they have to perform.

Management of functional safety

For each application the installer or the owner of a safety system must prepare a Safety Planning which must be updated
throughout the Safety Life-cycle of the Safety Instrumented System. The safety planning shall include the Safety instrumentation
management.
The requirements for the management of functional safety shall run in parallel with the overall safety lifecycle phases.
Safety Planning.
The Safety Planning shall consider:
– policies and strategies for achieving safety;
– safety life-cycle activities to be applied, including names of responsible persons and departments;
– procedures relevant to the various life-cycle phases;
– audits and procedures for follow up.

Information requirements (to be made available by the plant owner)

The information shall comprehensively describe the system installation and its use in order that all phases of the overall safety
lifecycles, the management of functional safety, verification and the functional safety assessment can be effectively performed.

Overall safety life-cycle information

The overall safety lifecycle shall be used as the basis for claiming conformance to the standard IEC61508. The lifecycle phases
consider all the activities related to the Safety Instrumented System (SIS) from the initial concept through design, implementation,
operation and maintenance to decommissioning.

Applicable laws and standards

All applicable general Laws and Standards related to the allowed operations of the equipment, as EU-Directives shall be col-
lected. The plant owner shall produce a Regulatory Requirements List document.

Additional instruction for IEC61508 certified device (digits 8 or T under “output” options)