O P E R A T I N G I N S T R U C T I O N S
e n
Safe motor feedback systems
1
About this document
Please read these operating instructions carefully before using the safe motor
feedback system or mounting it, putting it into operation or servicing it. The manu‐
facturer can only guarantee the safety function if these operating instructions are
followed consistently.
This document is an original document.
1.1 Purpose of this document
These operating instructions provide qualified technical personnel of the machine
manufacturer or the machine operator with instructions regarding the safe mount‐
ing, electrical installation, commissioning, operation, maintenance and decom‐
missioning of the safe motor feedback system.
These operating instructions must be made available to all those who work with
the safe motor feedback system.
Furthermore, planning and using safety-oriented sensors such as the safe motor
feedback system also requires technical skills that are not covered in this docu‐
ment. The official, legal and safety-relevant regulations for mounting and operat‐
ing the safe motor feedback system must always be complied with.
1.2 Symbols and document conventions
WARNING
A safety note informs you of real-world specifications for safely mounting and
installing the safe motor feedback system. This is intended to protect you
against accidents. Read and follow the safety notes carefully.
NOTE
Indicates useful tips and recommendations.
b
Instructions requiring specific action are indicated by an arrow. Carefully
read and follow the instructions for action.
1.3 Associated documents
•
“HIPERFACE DSL
®
MASTER” technical information, part number 8017596,
as of 17.01.2019 (or newer).
•
Specification of dangerous failure is described in “HIPERFACE DSL
®
MAS‐
TER” technical information.
2
Safety information
This chapter concerns your own safety and the safety of the system operator.
2.1 General safety notes
The national and international legal specifications apply to the installation and
use of the motor feedback system, to its commissioning and to technical inspec‐
tions repeated at regular intervals, in particular:
•
the Machinery Directive 2006/42/EC
•
the Equipment Directive 2009/104/EC
•
work safety regulations and safety regulations
•
any other relevant safety regulations
The manufacturer and operator of the machine, on which the safe motor feed‐
back system is used, are responsible for coordinating and complying with all
applicable safety specifications and regulations, in cooperation with the relevant
authorities.
The manufacturer of the drive system connected must have complied with the
safety requirements for the drive system design described in the technical infor‐
mation,“HIPERFACE DSL
®
MASTER”.
2.2 Intended use
The motor feedback system is ideal for the dynamic and precise operation of
servo-control circuits, due to its equipment.
The overall system, consisting of encoder, evaluation system, servo inverter and
motor, forms a control circuit.
The safety-oriented use of safe motor feedback systems with a HIPERFACE DSL
®
interface concerns application in combination with servo systems that work with
three-phase AC synchronous motors and alternatively AC asynchronous motors.
The following information can be derived from the digital position signals of the
motor feedback system linked directly to a motor shaft:
•
(Rotational) speed information and commuting information in AC synchro‐
nous motors
•
(Rotational) speed information in asynchronous motors
The safe motor feedback system can be used in conjunction with a drive system
in accordance with IEC 61800-5-2, in safety applications up to category 3 and
PL d in accordance with EN ISO 13849 or SIL2 in accordance with IEC 61508 or
SIL CL3 in accordance with EN 62061.
The safety integrity level of the encoder is SIL 2. The systematic capability of the
encoder is SC 3. Only when applied in redundant architecture, the encoder can be
utilized for SIL 3 applications, otherwise, i.e. when used standalone, it shall be uti‐
lized maximum for SIL 2 applications.
It fulfills the requirements of the Machinery Directive 2006/42/EC and provides
support for the drive system in ensuring:
•
The safety functions, based on the safe absolute position information
•
The safety functions, based on the incremental position information
The safety functions only apply for a single motor revolution (singleturn).
In the case of safety functions that are based on the safe multiturn absolute posi‐
tion, the motor feedback system only supplies one channel without safety-related
diagnostics upon being switched on. The user must implement a second channel
by using other measures.
The user can provide this second channel by saving the position of the motor
feedback system before switching it off and comparing it to the starting position of
the motor feedback system, when switching it on the next time.
Use for multiturn absolute position safety-related purposes is possible only, if the
values match. Otherwise, the user must carry out a reference run. Without a sec‐
ond channel for the multiturn absolute position, a reference run must be carried
out each time, the motor feedback system is switched on to confirm the absolute
position.
The motor feedback system is not able to create a safe state for the drive system
independently. The drive system has to create the safe state as a response to an
error displayed by the motor feedback system.
WARNING
The safe motor feedback system shall be used only within the limits of the
prescribed and specified technical data, dimensions and tolerances of the
dimensional drawings and operating conditions, and the specified tightening
torques must be complied with.
If used in any other way or if alterations are made to the device – including in
the context of mounting and installation – this will render void any warranty
claims directed to SICK STEGMANN GmbH.
2.3 Improper use
The motor feedback system must be mounted and adjusted exactly in accordance
with the specifications of the installation instructions. Every faulty installation or
faulty adjustment of the encoder may impair the specified functions and data;
partial restriction or a total failure of the specified safety functions cannot be
ruled out in individual cases.
WARNING
If stimulations in the vicinity of the resonance frequencies cannot be reliably
ruled out in the application, suitable tests must be carried out for the entire
drive system during the initial commissioning of the system. Suitable reme‐
dial measures must be incorporated.
WARNING
Violations of the specified accuracy of the position value in the vicinity of the
resonance frequencies can occur, due to physical restraints. If the mechani‐
cal stimulation in the vicinity of the resonance frequencies has a very high
amplitude, faults or failures of the specified safety functions can occur. We
highly recommend to avoid operation in the vicinity of the resonance frequen‐
cies or at least to limit the amplitude.
2.4 Requirements for the qualification of personnel
The safe motor feedback system may be mounted, put into operation, checked,
maintained or used only by qualified safety personnel. A qualified person
•
is someone who has taken part in adequate technical training
•
has been instructed by a machine operator in machine operation and the
applicable safety guidelines and
•
has access to these operating instructions.
3
Project planning
WARNING
The supply voltage must be generated by PELV systems (EN 50178) and shall
be limited to 15 VDC by external means. The motor feedback system corre‐
sponds to protection class III according DIN EN 61140. If the supply voltage is
not generated by the PELV systems, other measures must be found that will
guarantee that live parts are safely separated.
WARNING
Use only temperature sensors with doubled or reinforced insulation according
to protection class II according to IEC 61140:2016 because there is no gal‐
vanic separation of the temperature sensor in the motor feedback system.
The power supply unit current used for the motor feedback system must be
limited to a maximum continuous current of 1 A, either by the power supply
unit itself or using a fuse.
NOTE
When configuring the switch-on current, observe
Figure 1
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EDS35-2.../EDM35-2... | SICK
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