Introduction; General Information; Manual Organisation; Product Introduction And Overview - ABB Triguard SC300E Safety Manual

2

Introduction

2.1 General Information

This Safety Manual provides the information necessary to safely configure, install, operate,
maintain and de-commission Triguard SC300E Safety Controllers certified for safety
applications.
It should be recognised that this manual applies to all safety critical functions only. Where
functions apply to monitoring, indication only or non safety applications this manual does not
necessarily apply.
On all systems relating to safety it is first necessary to decide which I/O points are directly
related to the safety functions. These will normally include all inputs and outputs documented
on the "cause and effect charts" or "fault schedules", but may include other monitoring or control
points. It is the responsibility of the System Designer to enquire if any additional points are
safety related.
By following the guidance in this manual, the user will be assured that his Triguard SC300E
Safety System will be configured, installed, commissioned, operated and maintained with safety
first as the prime objective. This manual however can give no assurance that the basic safety
specifications (cause and effects/fault schedule) are correct.
This manual is restricted to safety aspects of the functions covered and does not remove the
requirements to follow the guidance in SC300E User Manual 008-5197.

2.2 Manual Organisation

The manual is structured following the introduction section to follow the safety aspects of the
Life Cycle model of the Triguard SC300E Programmable Safety Systems. Sections are
therefore provided on the safety aspects of Design and Configuration, Installation and
Commissioning, Operation, Maintenance and De-Commissioning.

2.3 Product Introduction and Overview

2.3.1

The Triguard SC300E

The SC300E has been designed as a cost effective, fault tolerant control system suitable for
use in industrial situations where the control system's reliability, availability and predictable
performance is of paramount importance. The Triguard SC300E is certified for use in safety
applications, such as process and emergency shutdown. For fire and gas applications refer
to the Safety Manual SS 0799.
The two key components of the Triguard SC300E, that permit system availability's in excess of
99.999%, (about 1 hour downtime in 11 years) to be realised, are as follows.
availability is calculated using MIL 217F failure rates and a given MTTR of typically 4 hours.
Lengthening or shortening the MTTR will decrease or increase the system availability
respectively.
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Issue 5 - September 2006
Triple Modular Redundant architecture - TMR
Software Implemented Fault Tolerance - SIFT
System
Page 8 of 65