EN 861:2007

SLOVENSKI STANDARD
01-december-2008
1DGRPHãþD
SIST EN 861:2000
Varnost lesnoobdelovalnih strojev - Kombinirani in debelinski skobeljniki
Safety of woodworking machines - Surface planing and thicknessing machines
Sicherheit von Holzbearbeitungsmaschinen - Kombinierte Abricht- und
Dickenhobelmaschinen
Sécurité des machines pour le travail du bois - Machines combinées à raboter et à
dégauchir
Ta slovenski standard je istoveten z: EN 861:2007
ICS:
25.080.25 6WURML]DSORãþLQVNRREGHODYR Planing machines
79.120.10 Lesnoobdelovalni stroji Woodworking machines
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 861
NORME EUROPÉENNE
EUROPÄISCHE NORM
June 2007
ICS 79.120.10 Supersedes EN 861:1997
English Version
Safety of woodworking machines - Surface planing and
thicknessing machines
Sécurité des machines pour le travail du bois - Machines Sicherheit von Holzbearbeitungsmaschinen - Kombinierte
combinées à raboter et à dégauchir Abricht- und Dickenhobelmaschinen
This European Standard was approved by CEN on 10 May 2007.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national
standards may be obtained on application to the CEN Management Centre or to any CEN member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as the
official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2007 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 861:2007: E
worldwide for CEN national Members.

Contents Page
Foreword.4
Introduction .5
1 Scope.6
2 Normative references.6
3 Terms and definitions .8
3.1 General.8
3.2 Definitions.8
3.3 Terms.10
4 List of significant hazards .12
5 Safety requirements and/or measures .16
5.1 General.16
5.2 Controls.16
5.2.1 Safety and reliability of control systems.16
5.2.2 Position of controls .17
5.2.3 Starting.17
5.2.4 Normal stopping.18
5.2.5 Emergency stop.19
5.2.6 Failure of the power supply.20
5.2.7 Failure of the control circuit .20
5.3 Protection against mechanical hazards .20
5.3.1 Stability.20
5.3.2 Hazard of break up during operation.21
5.3.3 Tool holder and tool design.21
5.3.4 Braking.21
5.3.5 Devices to minimise the possibility or the effect of ejection .22
5.3.6 Work-piece supports and guides.23
5.3.7 Prevention of access to moving parts.27
5.3.8 Guarding of drives.32
5.3.9 Characteristics of tool guards.32
5.3.10 Safety appliances.32
5.3.11 Demountable power feed .33
5.4 Protection against non-mechanical hazards .33
5.4.1 Fire.33
5.4.2 Noise.33
5.4.3 Emission of chips and dust.34
5.4.4 Electricity.35
5.4.5 Ergonomics and handling.36
5.4.6 Pneumatics.36
5.4.7 Hydraulics.36
5.4.8 Electromagnetic compatibility.37
5.4.9 Supply disconnection (isolation) .37
5.4.10 Static electricity.37
5.4.11 Maintenance.37
6 Information for use .38
6.1 General.38
6.2 Marking.38
6.3 Instruction handbook.39
Annex A (normative) Tests for bridge type guards for planing machines.42
A.1 Compression test.42
A.2 Shock test.42
A.3 Strength test for bridge type guard .42
Annex B (normative) Table lip resistance test .44
B.1 General.44
B.2 Work-piece.44
B.3 Measurements.46
B.4 Test.47
B.5 Result.47
Annex C (normative) Kickback test .49
Annex D (normative) Stability test for displaceable machines .50
D.1 Stability test in the surfacing mode.50
D.2 Stability test in the thicknessing mode.50
Annex E (normative) Impact test method for guards .52
E.1 General.52
E.2 Test method.52
E.2.1 Preliminary remarks.52
E.2.2 Testing equipment.52
E.2.3 Projectile for guards.52
E.2.4 Sampling.52
E.2.5 Test procedure.52
E.3 Results.53
E.4 Assessment.53
E.5 Test report.53
E.6 Test equipment for impact test .53
Annex F (informative) Use of well-tried components.55
Annex G (normative) Use of electronic components.56
G.1 General.56
G.2 SRECS design.56
G.2.1 Components, hardware.56
G.2.2 Safety related software.57
Annex H (normative) Braking tests.59
H.1 Conditions for all tests.59
H.2 Unbraked run-down time .59
H.3 Braked run-down time.59
Annex ZA (informative) Relationship between this European Standard and the Essential
Requirements of EU Directive 98/37/EC.60
Bibliography.63

Foreword
This document (EN 861:2007) has been prepared by Technical Committee CEN/TC 142 “Woodworking
machines - Safety”, the secretariat of which is held by UNI.
This European Standard shall be given the status of a national standard, either by publication of an identical
text or by endorsement, at the latest by December 2007, and conflicting national standards shall be withdrawn
at the latest by December 2008.
This document supersedes EN 861:1997.
This document has been prepared under a mandate given to CEN by the European Commission and the
European Free Trade Association, and supports essential requirements of the Machinery Directive.
For relationship with EU Directive, see informative Annex ZA, which is an integral part of this document.
Organisation contributing to the preparation of the European Standard include the European Association of
Manufacturer of Woodworking Machines "EUMABOIS".
The European Standards produced by CEN/TC 142 are particular to woodworking machines and complement
the relevant A and B standards on the subject of general safety (see introduction of EN ISO 12100-1:2003 for
a description of A, B and C standards).
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech
Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and United Kingdom.
Introduction
This document has been prepared to be a harmonised standard to provide one means of conforming to the
essential safety requirements of the Machinery Directive, and associated EFTA regulations.
This document is a type “C” standard as stated in EN ISO 12100-1:2003.
The machinery concerned and the extent to which hazards, hazardous situations and events are covered are
indicated in the scope of this document.
When provisions of this type C standard are different from those which are stated in type A or B standards, the
provisions of this type C standard take precedence over the provisions of other standards, for machines that
have been designed and built according to the provisions of this type C standard.
The requirements of this document are directed to manufacturers and their authorised representatives of
surface planing and thicknessing machines. They are also useful for designers and importers.
This document also includes provision and examples of information to be provided by the manufacturer to the
user.
Common requirements for tooling are given in EN 847-1:2005.
1 Scope
This document deals with the significant hazards, hazardous situation and events as listed in Clause 4
relevant to stationary and displaceable surface planing and thicknessing machines with an integrated feed in
thicknessing mode, (with or without demountable power feed unit in planning mode) and with manual loading
and unloading of the work-piece, hereinafter referred to as "machines". The cutterblock is fixed in position and
for thicknessing an integrated feed is provided. The machines are designed to cut solid wood, chipboard,
fibreboard and plywood when they are used as intended and under the conditions foreseen by the
manufacturer.
This document does not deal with any hazards which result from the attachment of an optional mortising unit.
These hazards are covered by prEN 940:2007.
This document does not apply to:
a) machines set up on a bench or a table similar to a bench, which are intended to carry out work in a
stationary position, capable of being lifted by one person by hand;
NOTE 1 Transportable motor-operated electric tools are covered by the requirements of EN 61029-1:2000 together
with prEN 61029-2-3:2004.
b) surface planing and thicknessing machines where the cutterblock is adjustable for depth of cut setting in
thicknessing mode;
c) machines where the conversion from planing to thicknessing mode or vice versa is achieved by mounting
or demounting parts/units;
d) machines where surfacing and thicknessing can be performed at the same time.
This document is not applicable to surface planing and thicknessing machines which are manufactured before
the date of its publication as EN.
NOTE 2 Machines covered by this document are listed under A.5 of Annex IV of the Machinery Directive.

2 Normative references
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
EN 294:1992, Safety of machinery — Safety distance to prevent danger zones being reached by the upper
limbs
EN 847-1:2005, Tools for woodworking — Safety requirements — Part 1: Milling tools, circular saw blades
EN 982:1996, Safety of machinery — Safety requirements for fluid power systems and their components —
Hydraulics
EN 983:1996, Safety of machinery — Safety requirements for fluid power systems and their components —
Pneumatics
EN 1005-2:2003, Safety of machinery — Human physical performance — Part 2: Manual handling of
machinery and component parts of machinery
EN 1005-4:2005, Safety of machinery — Human physical performance — Part 4: Evaluation of working
postures and movements in relation to machinery
EN 1037:1995, Safety of machinery — Prevention of unexpected start-up
EN 1088:1995, Safety of machinery — Interlocking devices associated with guards — Principles for design
and selection
EN 50178:1997, Electronic equipment for use in power installations
EN 50370-1:2005, Electromagnetic compatibility (EMC) — Product family standard for machine tools — Part
1: Emission
EN 50370-2:2003, Electromagnetic compatibility (EMC) — Product family standard for machine tools — Part
2: Immunity
EN 60204-1:2006, Safety of machinery — Electrical equipment of machines — Part 1: General requirements
(IEC 60204-1:2005, modified)
EN 60439-1:1999, Low-voltage switchgear and controlgear assemblies — Part 1: Type-tested and partially
type-tested assemblies (IEC 60439-1:1999)
EN 60529:1991, Degree of protection provided by enclosure (IP code) (IEC 60529:1989)
EN 61496-1:2004, Safety of machinery — Electro-sensitive protective equipment — Part 1: General
requirements and tests (IEC 61496-1:2004, modified)
EN 61508-3:2001, Functional safety of electrical/electronic/programmable electronic safety-related systems —
Part 3: Software requirements (IEC 61508-3:1998 + Corrigendum 1999)
EN 62061:2005, Safety of machinery — Functional safety of safety-related electrical, electronic and
programmable electronic control systems (IEC 62061:2005)
EN ISO 3743-1:1995, Acoustics — Determination of sound power levels of noise sources — Engineering
methods for small, movable sources in reverberant fields — Part 1: Comparison method for hard-walled test
rooms (ISO 3743-1:1994)
EN ISO 3743-2:1996, Acoustics — Determination of sound power levels of noise sources using sound
pressure — Engineering methods for small, movable sources in reverberant fields — Part 2: Methods for
special reverberant test rooms (ISO 3743-2:1994)
EN ISO 3744:1995, Acoustics — Determination of sound power levels of noise sources using sound pressure
— Engineering method in an essentially free field over a reflecting plane (ISO 3744:1994)
EN ISO 3745:2003, Acoustics — Determination of sound power levels of noise sources using sound pressure
— Precision methods for anechoic and semi-anechoic rooms (ISO 3745:2003).
EN ISO 3746:1995, Acoustics — Determination of sound power levels of noise sources using sound pressure
— Survey method using an enveloping measurement surface over a reflecting plane (ISO 3746:1995)
EN ISO 4871:1996, Acoustics — Declaration and verification of noise emission values of machinery and
equipment (ISO 4871:1996)
EN ISO 9614-1:1995, Acoustics — Determination of sound power levels of noise sources using sound
intensity — Part 1: Measurement at discrete points (ISO 9614-1:1993)
EN ISO 11202:1995, Acoustics — Noise emitted by machinery and equipment — Measurement of emission
sound pressure levels at a work station and at other specified positions — Survey method in situ
ISO 11202:1995)
EN ISO 11204:1995, Acoustics — Noise emitted by machinery and equipment — Measurement of emission
sound pressure levels at a work station and at other specified positions — Method requiring environmental
corrections (ISO 11204:1995)
EN ISO 11688-1:1998, Acoustics — Recommended practice for the design of low-noise machinery and
equipment — Part 1: Planning (ISO/TR 11688-1:1995)
EN ISO 12100-1:2003, Safety of machinery — Basic concepts, general principles for design — Part 1: Basic
terminology, methodology (ISO 12100-1:2003)
EN ISO 12100-2:2003, Safety of machinery — Basic concepts, general principles for design — Part 2:
Technical principles (ISO 12100-2:2003)
)
EN ISO 13849-1:2006 , Safety of machinery — Safety-related parts of control systems — Part 1: General
principles for design (ISO 13849-1:2006)
EN ISO 13849-2:2003, Safety of machinery — Safety-related parts of control systems — Part 2: Validation
(ISO 13849-2:2003)
ISO 7568:1986, Woodworking machines — Thickness planing machines with rotary cutterblock for one-side
dressing — Nomenclature and acceptance conditions
ISO 7960:1995, Airborne noise emitted by machine tools — Operating conditions for woodworking machines
HD 22.4 S4:2004; Cables of rated voltages up to and including 450/750 V and having crosslinked insulation —
Part 4: Cords and flexible cables
3 Terms and definitions
3.1 General
For the purposes of this document, the terms and definitions given in EN ISO 12100-1:2003 and the following
apply:
3.2 Definitions
3.2.1
surface planing and thicknessing machine
combined machine designed to plane a surface of a work-piece and to give it in a following operation a set
thickness by means of a horizontally rotating cutterblock, a cylindrical shaped complex tool equipped with
blades with horizontal straight cutting line that cuts while rotating (see for a description of the complex tool
also EN 847-1:2005)
NOTE The work-piece is fed into the machine against the direction of the cut.
When surfacing, the work-piece is passed over the cutterblock located between two tables which are used to position and
support the work-piece and the lower surface is planed. The infeed table of the surface planing unit is adjustable in height.
When thicknessing, both of the surfacing tables are raised. The work-piece rests on the thicknessing table the distance
between it and the cutting circle diameter is adjustable. The upper surface of the work-piece is planed

)
Superseded EN 954-1:1996.
3.2.2
thicknessing table
table used to support the work-piece during thicknessing at the machine which may comprise an assembly of
rollers, belts or other fixed or moving mechanical elements
3.2.3
surface planing tables
tables in front and behind the cutterblock used to support the work-piece at the machine during planing the
lower surface
3.2.4
integrated feed
feed mechanism for the work-piece which is integrated with the machine and where the work-piece is held and
controlled mechanically during the machining operation
3.2.5
loading of a surface planing and thicknessing machine in the thicknessing mode
manual placing of the work-piece on the thicknessing table at the infeed side with the following presentation to
the integrated feed device
3.2.6
stationery machine
machine designed to be located on or fixed to the floor or other parts of the structure of the premises and to
be stationary during use
3.2.7
displaceable machine
machine which is located on the floor, stationary during use and equipped with a device, normally wheels,
which allows it to be moved between locations
3.2.8
safety appliance
additional device which is not an integral part of the machine but which assists the operator in the safe feeding
of the work-piece e.g. push block or push stick
3.2.9
demountable power feed unit
feed mechanism which is mounted on the machine so that it can be moved from its working position to a rest
position and vice versa without the use of a spanner or similar additional device
3.2.10
kickback
particular form of ejection describing the uncontrolled movement of the work-piece or parts of it or parts of the
machine opposite to the direction of feed during processing
3.2.11
anti-kickback device
device which either reduces the possibility of kickback or arrests the motion during kickback of the work-piece
parts of it
3.2.12
run-down time
elapsed time from the actuation of the stop control device to spindle stand still
3.2.13
run-up time
elapsed time from the actuation of the start control device until the spindle reaches the actual speed related to
the intended speed
3.2.14
information from the supplier
statement, sales literature, leaflet or other documents in which a manufacturer (or supplier) declares either the
characteristics of e.g. a material or product or the conformity of the material or product to a relevant standard
3.2.15
operator position
position in which the operator stands to feed the work-piece to the tool
3.2.16
machine actuator
power mechanism used to effect motion of the machine
3.2.17
safety related electrical control system (SRECS)
electrical part of a control system whose failure can result in a hazard (3.2.4 of EN 62061:2005)
3.2.18
embedded software
software that is part of the system supplied by the manufacturer and is not accessible for modification by the
end user
NOTE 1 Embedded software is also referred to as firmware or system software (3.2.47 of EN 62061:2005).
NOTE 2 Manufacturer means manufacturer of the system.
EXAMPLE The operating system of a speed monitoring device.
3.2.19
application software
software specific to the application specifically implemented for the SRECS
NOTE In general it contains logic sequences, limits and expressions that control the appropriate outputs, decisions
necessary to meet SRECS functional requirements (see 3.2.46 of EN 62061:2005).
EXAMPLE The PLC program to run a machine.
3.2.20
safety related part of a control system (SRP(CS))
part or subpart(s) of a control system that responds to input signals and generates safety-related output
signals
NOTE The combined safety-related parts of a control system start at the point where the safety-related signals are
initiated (including e.g. the actuating cam and the roller of the position switch) and end at the output of the power control
elements (including e.g. the main contacts of the contactor). This also includes monitoring systems (3.1 of EN ISO 13849-
1:2006).
3.3 Terms
The names of the main parts of the machine are shown in Figures 1 a) and 1 b).
Figure 1 a) — Example of surface planing and thicknessing machine (set up for planing)

Figure 1 b) — Example of surface planing and thicknessing machine (set up for thicknessing)

Key
1 infeed table   6 controls
2 outfeed table   7 infeed table height adjustment
3 tiltable fence   8 bridge guard adjustment
4 bridge guard   9 thicknessing table
5 guard rear the fence  10 guard for thicknessing mode
Figure 1 — Example of surface planing and thicknessing machine
Key
1 anti kickback fingers
2 stop for the rotation of the finger
3 infeed roller
4 outfeed roller
5 cutterblock
6 direction of feed
Figure 2 — Example of internal of a one side planing and thicknessing machine

The most usual working operations when using the machine in the surface planing mode are shown in
Figure 3.
Figure 3 — Planing (left) and edging (right)

4 List of significant hazards
This clause contains the significant hazards, hazardous situations and events (see EN 1050:1996), as far as
they are dealt with in this document, identified by risk assessment as significant for the machines as defined in
the scope and which require action to eliminate or reduce the risk. This document deals with these significant
hazards by defining safety requirements and / or measures or by reference to relevant standards.
These hazards are listed in Table 1 in accordance with Annex A of EN 1050:1996.
Table 1 — List of significant hazards
Hazards, hazardous situations and Relevant
No hazardous events EN ISO 12100 clause of
this
document
Part 2:
Part 1:
2003 2003
1 Mechanical hazards related to:
- machine parts or work-pieces due to:
4.2 4.2.1, 5.3.3, 5.3.5,
4.2.2, 5 5.3.6, 5.3.7
a) shape;
b) relative location; 5.2.2, 5.2.5,
5.3.5, 5.3.6,
5.3.7
c) mass and stability (potential energy 5.3.1, 5.3.6,
of elements which may move under 5.3.7
the effect of gravity);
d) mass and velocity (kinetic energy of 5.2.3, 5.3.7
elements in controlled or uncontrolled
motion);
e) mechanical strength; 5.3.2, 5.3.3,
5.3.5, 5.3.6,
5.3.7, 5.3.8,
5.3.9,
Annex A,
Annex B,
Annex E
- accumulation of energy inside the machinery by:
f) elastic elements (springs); 4.2 4.10, 5.3.6, 5.3.7,
5.5.4 5.4.5
g) liquids and gases under pressure; 5.4.6, 5.4.7
1.1 Crushing hazard 4.2.1 5.3.7
1.2 Shearing hazard  5.3.7
1.3 Cutting or severing hazard 5.3.3, 5.3.7,

6.3
1.4 Entanglement hazard  5.3.7
1.5 Drawing-in or trapping hazard  5.3.7
to be continued
Table 1 — List of significant hazards (continued)
Hazards, hazardous situations and Relevant
No hazardous events EN ISO 12100 clause of this
document
Part 1: Part 2:
2003 2003
1.6 Impact hazard  5.3.6
1.9 High pressure fluid injection or ejection 4.2.1 4.10 5.4.7
hazard
2 Electrical hazards due to:
2.1 Contact of persons with live parts 4.3 4.9, 5.4.4
(direct contact) 5.5.4
2.2 Contact of persons with parts which 4.3 4.9 5.4.4
have become live under faulty
conditions (indirect contact)
4 Hazards generated by noise, resulting in:
4.1 Hearing loss (deafness), other 4.5 4.2.2, 5 5.4.2
physiological disorders (loss of
balance, loss of awareness)
4.2 Interference with speech  5.4.2
communication, acoustic signals
7 Hazards generated by materials and substances (and their constituent
elements) processed or used by the machinery
7.1 Hazards from contact with or inhalation 4.8 4.3b, 5.4.3
of harmful fluids and dusts 4.4
7.2 Fire 4.8 4.4 5.4.1
8 Hazards generated by neglecting ergonomic principles in machinery
design:
8.1 Unhealthy postures or excessive effort 4.9 4.7, 5.2.2, 5.4.5,
4.8.2, 6.3
4.11.12,
5.5.5,
5.5.6
8.2 Hand-arm or foot-leg anatomy 4.9 4.8.3 5.2.2, 5.3.7,
5.4.5
8.4 Local lighting 4.8.6 6.3
8.6 Human error, human behaviour 4.9 4.8, 6.3
4.11.8,
4.11.10,
5.5.2, 6
8.7 Design, location or identification of 4.8.7, 5.2.2
manual controls 4.11.8
8.8 Design or location of visual display 4.8.8, 5.4.5, 5.4.9,
units 6.2 6.1, 6.2
to be continued
Table 1 — List of significant hazards (concluded)
Hazards, hazardous situations and Relevant
No hazardous events EN ISO 12100 clause of
this
Part 1: Part 2:
document
2003 2003
9 Combination of hazards 4.11  5.2.3, 5.2.5,
5.2.6, 5.2.7,
5.3.5, 5.4.9,
5.4.10
10 Unexpected start-up, unexpected overrun/overspeed (or any similar
malfunction) from:
10.1 Failure/disorder of the control system  4.11, 5.2.1, 5.2.2,
5.5.4 5.2.3, 5.2.4,
5.2.5, 5.2.6,
5.2.7
10.2 Restoration of energy supply after an 4.11.4 5.2.6
interruption
10.3 External influences on electrical 4.11.11 5.4.8, Annex
equipment G
10.5 Errors in the software 4.11.7 Annex G
10.6 Errors made by the operator (due to 4.9 4.8, 5.4.5,
mismatch of machinery with human 4.11.8, 5.4.10, 6.3
characteristics and abilities, see 8.6) 4.11.10,
5.5.2, 6
11 Impossibility of stopping the 4.11.1, 5.2.4, 5.2.5,
machine in the best possible 4.11.3, 5.3.4
conditions 5.5.2
13 Failure of the power supply 4.11.1, 5.2.6
4.11.4
14 Failure of the control circuit 4.11, 5.2.1, 5.2.7,
5.5.4 5.3.4
15 Errors of fitting
4.9 4.7, 6.5 6.2
16 Break-up during operation 4.2.2 4.3 5.3.2, 5.3.8,
5.3.9, Annex
A, Annex B,
Annex C
17 Falling or ejected objects or fluids
4.2.2 4.3, 5.3.2, 5.3.3,
4.10 5.3.6
18 Loss of stability / overturning of 4.2.2 5.2.6 5.3.1
machinery
5 Safety requirements and/or measures
5.1 General
The machine shall comply with the safety requirements and/or protective measures of Clause 5.
NOTE 1 In addition, the machine should be designed according to the principles of EN ISO 12100:2003 (parts 1 and 2)
for hazards relevant but not significant, which are not dealt with by this document (e.g. sharp edges of the machine frame).
NOTE 2 For guidance in connection with risk reduction by design see Clause 4 of EN ISO 12100-2:2003 and for
safeguarding measures see Clause 5 of EN ISO 12100-2:2003.
5.2 Controls
5.2.1 Safety and reliability of control systems
5.2.1.1 General
For the purpose of this document safety related part of a control system means the system from the initial
device, e.g. push button, detector or sensor up to and including the power control element of the final machine
actuator, e.g. motor or brake. Safety related parts of the control system of this machine comprise parts
concerning the following functions and they shall fulfil the requirements of the categories given below
according to EN ISO 13849-1:2006:
 starting: category 1 or 3 (see 5.2.3);
 normal stopping: category 1 or 3 (see 5.2.4);
 emergency stop: category 1 or 3 (see 5.2.5);
 interlocking: category 1 (see 5.2.3, 5.2.6, 5.3.7, 5.3.8);
 interlocking with guard locking: category 1 (see 5.2.4, 5.2.5, 5.3.7, 5.3.8);
 braking: category 1 or 2 (see 5.3.4);
 preventing of unexpected start up in the event of power supply failure: category 1 or 3 (see 5.2.6, 5.2.7);
 brake release: category B (see 5.3.4.1, 5.3.4.2);
 motor switching off (where a mechanical brake is fitted and in certain conditions): category 1 (see
5.3.4.1);
 for interlocking of the power supply to a socket for the de-mountable power feed unit with cutterblock:
category 1 (see 5.2.3, 5.3.10);
 interlocking between the feed drive motor and the cutterblock drive motor: category 1 (see 5.2.3);
 hold to run control: category 1 or 3 (see 5.2.3, 5.3.6);
 planing table(s) powered adjustment initiation (s): category B, 1 or 3 (see 5.2.3, 5.3.6.2.1);
 thicknessing table powered adjustment: category B, 1 or 3 (see 5.2.3).
Any combination of safety related parts of control systems of different categories which achieve at least the
same level of fault resistance is acceptable according to 6.3 of EN ISO 13849-1:2006.
Where more than one category is given further information about the necessary type is specified in the quoted
clauses.
Where category 1 is required categories 3 and 4 also fulfil the requirement. Where category 2 is required
categories 3 and 4 also fulfil the requirements, where category 3 is required category 4 also fulfils the
requirement.
NOTE 6.3 of EN 13849-1:2006 gives useful information on combination of safety-related parts to the same or
different categories.
Verification: By checking the relevant drawings and/or circuit diagrams and inspection of the machine.
5.2.1.2 Use of well-tried components
Components are considered well-tried if they comply with 6.2.4 of EN ISO 13849-1:2006 (see Annex F).
NOTE 1 Well-tried electrical components are listed in Table D.3 of EN ISO 13849-2:2003.
NOTE 2 EN ISO 13849-2:2003 gives useful information on assessment of well-tried components, possible exclusion of
faults etc.
Verification: By checking the relevant drawings and/or circuit diagrams and inspection of the machine.
5.2.1.3 Use of electronic components
If electronic components are used the requirements given in Annex G shall be met.
Verification: By checking the relevant drawings and/or circuit diagrams, inspection of the machine,
measurement and functional testing of the machine.
5.2.2 Position of controls
The electrical control actuator for starting, normal stopping, emergency stop and powered table adjustment (if
fitted-see 5.2.3) shall be located either:
a) on the machine at the infeed side of the machine at least 600 mm from the floor and at least 50 mm below
the upper surface of the surfacing table reachable from the infeed side of the thicknesser, or
b) at a fixed or moveable control panel fixed to the machine at the loading position, the controls of which are
not more than 1 800 mm from the floor and the front face is at a maximum of 650 mm from the infeed
edge. The front face of the panel shall not protrude beyond the machine at the operator position side.
An additional emergency stop actuator, if required in accordance to 5.2.5, shall be located at least 600 mm
from the floor and at the outfeed side of the thicknesser.
Verification: By checking the relevant drawings, measurement and inspection of the machine.
5.2.3 Starting
Before starting or restarting the machine all the safeguards shall be in place and functional. This is achieved
by the interlocking arrangement described in 5.3.7. For non interlocked guards, guides adjustments'
provisions before starting see 6.3 h 4)).
Start or restart shall only be possible by actuation of the start control device provided for that purpose.
For electrically operated machines the requirements of 9.2.5.2 of EN 60204-1:2006 shall apply and in addition:
 for the purpose of this document "operation" means rotation of the cutterblock and/or the integrated feed
and/or powered adjustment;
 start of the feed motor shall be possible only where the tool spindle motor is running at full speed e.g. by
using a time delay of fail safe technique e.g. of capacity type conforming to the requirements of category
3 according to EN ISO 13849-1:2006. For a machine with one motor only the start of the feed shall be
possible only if the tool spindle drive has been activated;
 design of the control circuits shall be such as to satisfy the starting sequence requirements. If a time
delay device is used the time delay shall be at least equal to the run-up time. The time delay shall be
fixed or the time delay device adjustment shall be sealed.
When adjustment of the table(s) for planing and/or the table for thicknessing is powered, the control shall be of
the hold to run control type.
For machines with adjustment preset electronic control of table(s) for planing and/or of table for thicknessing:
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 either the table(s) adjustment speed shall not exceed 10 mm s and the start command may be category
B according to EN ISO 13849-1:2006, or
 adjustment for the table(s) shall be initiated by a start command from the operator (e.g. push button) the
control circuit of which conforms to category 1 or to category 3 in accordance with the requirements of
EN ISO 13849-1:2006.
At the end of programmed adjustment the power shall be cut to the adjustment actuator. A new initiation shall
be necessary to perform additional adjustment.
The category of the control circuits (also see 5.2.1) for start and restart of the machine and for the integrated
feed motor shall be in accordance with the requirements of EN ISO 13849-1:2006 and at least:
a) category 1 if the control circuits are hardwired;
b) category 3 if the control circuits include electronic components.
The category of the control circuit (also see 5.2.1) for hold-to-run control shall be in
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