AADvance Controller Introduction

The AADvance controller meets non-safety business requirements and SIL 2 and SIL 3 safety related system requirements. The system has comprehensive built-in redundant capabilities that improve system availability. The AADvance safety system features are:

• Easily transformed from a simplex non-safety system to a fault tolerant safety related system.

• An AADvance platform provides a set of components that can be configured to meet a range of safety and fault tolerance user requirements within a single system such as - fault tolerant topologies 1oo1, 1oo2D and 2oo3.

• IEC 61508 certified, reviewed and approved for safety systems up to SIL 3 by independent certifying bodies.

• The scalable characteristics of the system enables independent safety functions within the same system to be configured with different architectures to meet a user specific safety and availability requirements.

• The main components that provide the safety architecture are the processor and I/O modules; the remaining components provide secure external interfaces and connectivity between the field elements and the main components and add to the safety functionality.

• AADvance processor modules are designed to meet the requirements for SIL 2 in a simplex configuration and SIL 3 in a dual or triplicated configuration.

• Individual input modules are designed to meet the requirements for SIL

3 in simplex, dual or triple configurations.

• Individual output modules have been designed to meet the requirements for SIL 3 in a simplex or dual configurations.

• Safe SIL 3 rated 'Black Channel' external communication over Ethernet.

System Installation Environment

The installation environment can be a source of common cause failure so it is necessary that the installation assessment covers the environmental specification for the AADvance system and includes the following:

• the prevailing climatic conditions

• type of area, e.g. is it a hazardous or non-hazardous area

• location of power sources

• earthing and EMC conditions

In some customer installations parts of the system can be installed in differing locations; in these cases the assessment must include each location. Power Sources and Heat Dissipation Calculations It is highly recommended that module supply power and field loop power consumption calculations are done to find out the heat dissipation before designing a suitable enclosure and making a decision about the installation environment (see topic "System Design for Heat Dissipation").