Simpro Multi-Tip MT1600B, Руководство пользователя

Страница: 11 / 48

User Manual | Simpro Multi-Tip®
Original Instructions | English | v35.0 | December 2019 | Page
10
ISO 13849-1:2015 is a machinery-safety standard issued by the International Standards
Organisation. It provides safety requirements and guidance on the principles for the
design and integration of safety-related parts of control systems (SRP/CS), including the
design of software.
ISO 13849-1 has been modified for local conditions and reissued under different
terminology by some national standards authorities. In Australia and New Zealand the
equivalent (almost identical) standard is called AS/NZS 4024.1:2014.
In the USA, ANSI standards are commonly used to demonstrate the safety of machinery,
rather than ISO 13849-
. H weve s ce he U e e es ge ‘bes c se’
‘ b ’ e f ce w k ce H& s, U c es wh e s e ch e
safety using ISO 13849-1 may be considered to have met or exceeded their H&S
obligations.
3.3.1 The ISO 13849-1:2015 safety model
U ke he ‘s s e ch ec e’ e se b e e s fe s s, I O -1:2015 uses
‘f c s fe ’ e f ch e s fe . h s, kes cc f he eliability of
parts as well as other factors to create a comprehensive measure of the risk reduction
achieved by a safety function
– an indicator called Performance Level (PL).
The standard defines five Performance Levels, ranging from PL(a) (lowest performance) to
PL(e) (highest performance).
The standard also defines the Performance Level that a given safety function must achieve
to reduce the risk to an acceptable level
– a value called Performance Level required (PLr) .
3.3.1.1 Determining the Performance Level required (PLr)
As defined by the ISO 13849-1:2015 safety model, the minimum acceptable PLr for any given
safety function is based on three input parameters:
1. Severity of injury expected from the associated hazard
2. Frequency and/or duration of exposure to the associated hazard
3. Possibility of manually avoiding the associated hazard
The following table may be used to determine the acceptable PLr from these parameters.
Safety Function PLr Determination Table
Severity of injury
expected from hazard Frequency and/or duration
of exposure to hazard Possibility of manually
avoiding the hazard Minimum
acceptable PLr
Slight injury (reversible)
Seldom to quite often
and/or exposure time is
short Possible under specific
conditions
PL(a)
Scarcely possible
PL(b)
Frequent to continuous
and/or long exposure time
Possible under specific
conditions
Scarcely possible
PL(c)
Serious injury or death
(irreversible)
Seldom to quite often
and/or exposure time is
short Possible under specific
conditions
Scarcely possible
PL(d)
Frequent to continuous
and/or long exposure time
Possible under specific
conditions
Scarcely possible
PL(e)