Renishaw TONiC FS T301 Series, Functional Safety Manual, Page: 4 / 26

2 TONiC RSLM20/RELM20 Functional Safety installation guide and safety manual Original instructions
Definitions Functional Safety data declaration
WARNING
A hazard with a medium risk of injury if not avoided
ESD handling
The ESD Susceptibility Symbol consists of a triangle, a reaching hand, and a slash
through the reaching hand. The triangle means
‘Caution’
and the slash through the
reaching hand means ‘Don’t touch’ .
Mechanical safe position
The maximum distance the scale might move from its installed position, for example if
the fixings work loose.
Evaluation unit
External item of equipment in which the output signal of the encoder is evaluated,
e.g. machine controller or safety relay.
System manufacturer
Personnel with responsibility for selecting the encoder and verifying its capability is
appropriate for the safety related application.
System installer
Personnel with responsibility for fitting the encoder in the specific application.
WARNING
Not to be used in environments where there is an explosive atmosphere
WARNING
Not to be used by medical devices
The TONiC FS system is designed to be used as part of a safety-related control system as specified by the system
manufacturer. It is the responsibility of the system manufacturer to set the evaluation unit to implement the appropriate
actions when the TONiC FS system reports an error. The decision to use this system for the intended purpose is the
responsibility of the system manufacturer. The TONiC FS system is certified to the SIL and PL levels as shown in the
‘Functional Safety data declaration’, however the system manufacturer must conduct their own assessment of the full
system to determine its safety capability.
Correct use includes:
X Operating the TONiC FS system within the limits defined in this document.
X Installing the system as described in this document.
X Maintaining the system as described in this document.
System components:
The TONiC FS system comprises the following parts:
X TONiC FS readhead.
X TONiC Ti0000A00A or DOP interface.
X RSLM and RELM linear scale – adhesive mount only.
NOTES:
X Clip mounting RELM/RSLM linear scale is not approved for use with the TONiC FS encoder system.
X Only the analogue sine and cosine outputs are functionally safe.
If the original termination supplied with the TONiC FS system is altered or an extension cable used, then it is the
responsibility of the system manufacturer to make sure the system is compliant with IEC 61800-5-2 Annex E
– Electromagnetic immunity requirement for safety related systems.
Information for use
Product identification TONiC FS (Functional Safety)
TONiC
readhead
TONiC
readhead and
Ti interface
TONiC
readhead and
DOP interface
MTTF
D
(years)
1300 800 300
Diagnostic coverage
Medium (90%)
Category 3
Performance level d
Lifetime/replacement limits
20
TONiC
readhead
TONiC
readhead and
Ti interface
TONiC
readhead and
DOP interface
Safety integrity level
2
Random hardware
failures (per hour)
l
S
1.77 × 10
−7
1.77 × 10
−7
1.77 × 10
−7
l
D
8.41 ×10
−8
1.38 × 10
−7
3.49 × 10
− 7
l
DD
7.57 × 10
−8
1.25 × 10
−7
3.14 × 10
− 7
l
DU
8.41 × 10 −9 1.38 × 10 −8 3.49 × 10 − 8
PFD
avg
Not available as this system does not support low
demand mode
PFH (per hour) 8.41 × 10
−9
1.38 × 10
−8
3.49 × 10
− 8
Architectural
constraints
Type B
HFT 0
SFF 96%
Hardware safety integrity
compliance
Route 1H
Systematic safety integrity
compliance
Route 1S
Systematic capability SC 2
Demand mode
Continuous
IEC 61508 safety data
ISO 13849 safety data