ABB is used to drive the main control board NINT-72C 61336125G

Description

NINT-72C The 1oo2D system has an architecture that consists of two parallel control branches that act

independently and with equal priority on the control decision. The common mode of operation

and any common source of failure is reduced.

Active self-tests instead of voting mechanisms NINT-72C reduces the probability of accumulated hidden

dangerous failures in the system.

The two parallel control branches read the field signals, execute the safety control logic,

calculate the control outputs and set the field output signals individually and independent of

each other. However, each control branch is able to set the field output signals only when its

diagnostics control gives an active permissive signal.

The combination of active self-testing with permissive control of any control action adds

optimal failure tolerance capability to the superior attributes of the 1oo2 architecture regarding

safety integrity.

Extensive and active self-tests with replication are implemented individually in both control

branches. Detected failures are generally isolated NINT-72C from causing any spurious interruption of the

process. In the event of correlated failure in both branches a fail-to-safe action takes place.

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The 1oo1D system has an architecture that consists of one control branch that performs the

control decision. The safety output handling is duplicated as in the dual controller structure to

maintain the test and availability of the safety function.

ABB Safety has chosen TÜV Product Service GmbH as our NINT-72C external validation and certification

partner. TÜV Product Service is a highly recognized certification authority.

All development of the Safeguard 400 Series product is performed in a close relationship with

TÜV. The following major milestones are part of a development project:

• Concept approval
• Design approval
• Functional validation

For details regarding certification, please refer to the Safeguard 400 Series Safety Manual,

3BNP000432R301. The Safety Manual is a TÜV approved document and contains relevant

information for implementation and maintenance of the safety system.

Single Safeguard and dual Safeguard have different levels of certification. Safeguard 410 and

Safeguard 415 are designed to comply with the requirements of AK 6/SIL 3. A Single

Safeguard system may be configured to comply NINT-72C with the requirements of AK 4/SIL 2

The different types of certification status for the various system components are defined as

follows.

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