Systems and components for Functional Safety · Approved SIL3/PLe encoders absolute and incremental
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Systems and components for
Functional Safety
· Approved SIL3/PLe encoders
absolute and incremental
· Safety modules for safe drive
monitoring
· Control solutions for safe
processing of safety sensors
Functional Safety
SIL3 / PLe approved encoders
Safety is – not least since the EU Machinery Directive /42/EC – an “integral part of the construction
of drives”. When choosing the right encoder for functional safety the principle applies that safety is
achieved through the intelligent combination of encoder, controller and actuator.
Sendix SSI absolute encoders, with an additional SinCos incremental output, and SinCos versions of
incremental encoders are available with certification.
But safety goes further than this: safe components are characterised by a robust reliable interface and
by the ability to cope with high mechanical and electronic loads.
Safe Incremental Encoder Function
In order to achieve safe incremental information with the encoder,
the controller must monitor the validity of the analogue, ° phase-
shifted sine/cosine signals with the help of the function:
sin² + cos² = 1
Safe Absolute Encoder Function Safe mechanical connection
In order to obtain safe information with the encoder regarding A % reliable mechanical connection is required for a safe
the absolute position, the controller counts the incremental function in the applications.
pulses and compares the result with the absolute positions Suitably sturdy fixing elements can help eliminate the risk
also provided by the encoder. of faults.
www.kuebler.com/safety
Multitalented device: Absolute encoder with incremental sine/cosine
signals, multiturn stage and integrated functional safety
Drive control using incremental sine and cosine signals is a triedand-tested technology with
a number of advantages. The high interpolatability of the analogue sine and cosine signals,
with more than million steps per revolution, allows for precise control of both slow turning
as well as highly dynamic drives.
Combined with the high resolution and very accurate position information provided by the
absolute encoder, all the data necessary for a precisely controlled motor start-up with an
encoder is available.
Furthermore, the multiturn sensor technology permits position control over a wide range.
And finally, the high information content of the signals – all independent of one another
– forms the basis for a sensor with high functional safety.
Absolute Singleturn / Multiturn Encoders ATEX Encoders
Sendix SIL / SIL, Sendix SIL / SIL Sendix SIL – Incremental encoder (SinCos)
(SSI, BiSS-C and SinCos) Sendix SIL – Absolute singleturn encoder
(SSI, BiSS-C and SinCos)
The absolute position of the encoder family x3SIL is transmitted Sendix SIL – Absolute multiturn encoder
in the form of a digital SSI or BiSS-C data word. (SSI, BiSS-C and SinCos)
With the singleturn variants SIL and SIL the resolution is
between bits and bits, depending on the variant. EX protection and Functional Safety in one device.
In contrast to the singleturn variants SIL / SIL, the The Sendix encoders Sendix SIL, SIL and SIL can be
multiturn variants SIL / SIL have in addition a gear used in safety-relevant applications up to SIL3 according to DIN EN
for detecting positions greater than °. The maximum measurable ISO -5-2 or PLe according to DIN EN ISO.
number of revolutions is bits. This thus gives a total resolution for The Sendix ATEX encoders with “flameproof enclosure” are
the multiturn of up to bits. approved for zones 1, 2, and.
The incremental position is provided in the form of an analogue The shock and vibration-resistant encoders operate flexibly with
sine/cosine signal. The resolution per revolution is sine/cosine a resolution of up bits. With a protection level of IP67, a wide
periods. temperature range from -40°C to +60°C and a housing and flange
Additional features: out of seawater-resistant aluminium, they are best suitable for
· Interlocked bearings for a high degree of ruggedness, accuracy outdoor offshore or coastal applications.
and long service life The compact design, with its installation depth of only mm,
· Protection rating IP or IP diameter of mm and space-saving cable outlet, rounds off the
· Magnetically insensitive due to optical scanning flexible, diverse application possibilities in areas with explosion
hazards.
Incremental Encoders
Sendix SIL / SIL with SinCos outputs
The incremental position of the encoder family x4SIL is provided
in the form of an analogue sine/cosine signal; here the resolution per i MTTFd Values
revolution is or sine/cosine periods.
Additional features: With regard to the requirements of the Machinery Directive
· With protected Safety LockTM Technology: interlocked bearings /42/EC the MTTFd values for the most important
for a high degree of ruggedness, accuracy and long service life standard encoders from Kübler are also provided.
· Protection rating IP or IP This thus enables the user to carry out his own
· Magnetically insensitive due to optical scanning calculations according to DIN EN -5-2 and
DIN EN ISO.
www.kuebler.com/safety
Safety modules for safe drive monitoring
Safe motion control for speed or position monitoring in multi-axes operation – the Safety-M
modules allow you implementing your safety technique tasks in compliance with the
Directive on machines /42/EC.
Independently from the drive technology, the Safety-M modules offer all functions
according to EN -5-2 for drive monitoring and, in addition, practice-oriented function
extensions.
Safety-M modules – the ideal solution for all Safe PLC – simple programming of the monitoring
safety-relevant tasks functions
Kübler’s Safety-M modules allow for easy implementation of the The Safe PLC software offers a comfortable graphic programming
requirements of the Directive on machines. with function chart and block functions.
For just a few digital signals or for a whole production island – the
Safety-M modules offer an optimal solution for every task. A comprehensive functions library is available, for the pre-
The modules are easily extendable and can be integrated without processing of sensors (inputs) or actuators (outputs) and, above all,
problems in any standard control environment. The BM field bus for the safe drive monitoring.
extension modules take in charge the connection of the Safety-M A simple combination of the input, monitoring and output functions
modules with existing Profibus, Profinet, CANopen or EtherCat by means of logic blocks allows a quick and transparent creation of
networks. even comprehensive safety functions. All functions have an open
The integrated digital signal processing functions – such as the design with respect to the used sensors, drives and actuators.
safe motion monitoring with highest requirement – ensure a very Variable parameters can be set easily during assembly or on the
comfortable resolution of typical safety tasks. field, without having to alter the program.
But the Safety-M modules offer much more! Main advantages of the Safe PLC software:
Safe sensors, command devices and shut-off channels – no problem • Easyprogramming
with Safety-M. • Easyparameterising
Integrated monitoring functions with many additional practice- • Easyvalidation
oriented functions ensure a simple and transparent implementation
of your task.
Terminal chart
Input devices
Drive monitoring functions
Logic functions
Logic chart
Encoder configuration
www.kuebler.com/safety