SICK ES21 User manual

OPERATING INSTRUCTIONS
ES21
Safety switches

Described product
ES21
Manufacturer
SICK AG
Erwin-Sick-Str. 1
79183 Waldkirch
Germany
Legal information
This work is protected by copyright. Any rights derived from the copyright shall be
reserved for SICK AG. Reproduction of this document or parts of this document is
only permissible within the limits of the legal determination of Copyright Law. Any modi‐
fication, abridgment or translation of this document is prohibited without the express
written permission of SICK AG.
The trademarks stated in this document are the property of their respective owner.
© SICK AG. All rights reserved.
Original document
This document is an original document of SICK AG.
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Contents
1 About this document........................................................................ 4
2 On safety............................................................................................. 5
2.1 Area of use................................................................................................ 5
2.2 Qualified personnel.................................................................................. 5
3 Product description........................................................................... 6
3.1 Items supplied.......................................................................................... 6
3.2 Function..................................................................................................... 6
4 Mounting and connection................................................................ 7
4.1 Mounting and connection of the built-in version.................................... 7
4.2 Mounting and connecting the surface-mounted version....................... 8
5 Checks before initial commissioning............................................. 10
6 Recurring technical checks.............................................................. 11
7 Response to malfunctions............................................................... 12
8 Deinstallation..................................................................................... 13
9 Disposal.............................................................................................. 14
10 Technical specifications................................................................... 15
11 Dimensional drawings...................................................................... 17
12 Conformities and certificates.......................................................... 19
12.1 EU declaration of conformity.................................................................... 19
12.2 UK declaration of conformity................................................................... 19
13 Ordering information........................................................................ 20
CONTENTS
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1 About this document
These operating instructions are original operating instructions.
1 ABOUT THIS DOCUMENT
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2 On safety
Read these operating instructions carefully and keep them in a safe place.
The operating instructions are to be provided to the person who is installing the emer‐
gency stop pushbutton.
DANGER
bAlways note and follow the warnings below!
•Before starting the installation, electrically isolate system and device!
•Emergency stop pushbuttons provide a personnel protection function. Incorrect
installation or manipulation can result in serious injuries!
•Emergency stop pushbuttons are not allowed to be bypassed, removed or ren‐
dered ineffective in any other manner!
•The switching process is only allowed to be triggered by suitable pushbuttons that
are securely fastened to the switching element!
•Use suitable connections for the switching element!
•Incorrect installation or tampering can result in damage to the machine and
workpiece!
•The emergency stop function is not allowed to be used as a replacement for
protective measures or other safety functions, instead it should be designed as an
additional protective measure.
•The emergency stop function is not allowed to degrade the effectiveness of protec‐
tive devices or other devices with safety functions.
•Based on a risk analysis, the designer must ensure that the emergency stop
achieves the required level of safety (SIL, SILCL or PL) in combination with control
system.
•For emergency stop pushbuttons with key release, the key must only ever be
inserted when it is actually being used for unlocking.
2.1 Area of use
National and international legal specifications apply to the installation and use of the
emergency stop pushbutton, to its commissioning, and to recurring technical inspec‐
tions, in particular:
•The Machinery Directive
•The Low Voltage Directive
•The safety regulations
•The work safety regulations and safety regulations
The manufacturer and user of the machine on which the protective devices are used
are responsible for liaising with the relevant authorities about all applicable safety
regulations/rules and for ensuring compliance with these.
Intended use also includes regular monitoring of the protective device by qualified
safety personnel.
2.2 Qualified personnel
The emergency stop pushbutton may be mounted, put into operation, checked, main‐
tained, or used only by qualified safety personnel.
A person who satisfies all the following conditions is deemed properly qualified:
•Appropriate technical training
•Instruction of the machine operator in machine operation and the applicable
safety guidelines
•Access to these operating instructions
ON SAFETY 2
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3 Product description
The emergency stop pushbutton comprises a pushbutton and a switching element with
up to five functions.
The emergency stop pushbuttons are available as a built-in version and as a surface-
mounted version with a housing.
3.1 Items supplied
•built-in version:
– either: complete set with pushbutton incl. switching element in one package
– or: pushbutton or switching element separate
•surface-mounted version: complete set with pre-assembled pushbutton in a hous‐
ing with latching switching element
3.2 Function
The switching elements are actuated by the pushbutton. To maintain safety if the
switching element becomes separated from the pushbutton, the switching elements for
the built-in version are equipped with self-monitoring. This feature opens a contact if
the switching element is separated from the pushbutton. The selfmonitoring detects the
fault and triggers the emergency stop function.
3 PRODUCT DESCRIPTION
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4 Mounting and connection
DANGER
Pay attention to the correct assembly of the switching elements!
The switching elements are correctly fitted from the factory.
bIf you re-assemble the switching elements, make sure that all actuating pins are
actuated by the pushbutton!
a Incorrect mountingCorrect mounting a Incorrect mountingCorrect mounting
4.1 Mounting and connection of the built-in version
1. Drill mounting holes in the mounting plate (see figure 3, page 17; use the correct
dimensional drawing for the design).
2. Make sure the surface is smooth to ensure tightness.
3. Insert pushbutton through the mounting hole and fasten lock nut (max. torque
2.5Nm).
4. Fit switching element and turn one eighth of a turn clockwise. The switching
element engages.
5. In the case of illuminated pushbuttons, the male connector must also be guided
through the small drill hole in the mounting plate (see figure 3, page 17, right
dimensional drawing) and connected to switching element X1/X2.
6. Check whether the contacts for the self-monitoring are closed with the switching
element engaged if the pushbutton is not actuated.
7. Connect connecting cable to the terminal strip. Pay attention to permissible electri‐
cal and mechanical data (see "Technical specifications", page 15).
NOTE
On the usage of illuminable pushbuttons, a maximum of 230 V AC is allowed to be
connected to the switching elements.
MOUNTING AND CONNECTION 4
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unlocked by turning
unlocked by turning
unlocked using a key
Pushbutton Switching elements
Monting
plate
4.3
4.4
2.1
1.2
3.X1
3.X25.12.2
4.3
4.4
2.1
1.25.12.2
2.3
2.4 1.23.1
3.1 1.2
2.1
2.2 1.23.1
Pushbutton,
With jamming protection,
Illuminable
with jamming protection,
unlocked by turning
With jamming protection,
unlocked using a key
Illuminable
with jamming protection,
unlocked by turning
With protective collar
Illuminable
unlocked by turning
With protective collar
Illuminable
With protective collar
unlocked using a key
With protective collar
Illuminable
unlocked using a key
With one positive opening
normally closed contact
With one positive opening
normally closed contact and
one normally open contact
With two positive opening
normally closed contact
With two positive opening
normally closed contacts and
one normally open contact
With two positive opening
normally closed contacts,
one normally open contact
and illumination connection
Lock nut
Figure 1: Pushbuttons and switching elements for the built-in version and their mounting
4.2 Mounting and connecting the surface-mounted version
DANGER
Make sure that the emergency stop pushbutton is easily accessible!
Mount the emergency stop pushbutton such that it can be reached easily. This state‐
ment applies in particular for emergency stop pushbuttons with a high protective collar!
1. Mount the lower part of the housing or the base of the housing on a flat surface.
The mounting holes in the floor of the housing have a diameter of 4.2 mm with
a distance of 59 × 39 mm between the holes (see figure 6, page 18). These
dimensions can also be found on the base of the housing.
2. Lay the connecting cable through one of the two M20 cable entries.
3. Connect the connecting cables to the terminal strips. During this process pay
attention to the permissible electrical and mechanical data (see "Technical specifi‐
cations", page 15). Make sure the switching elements installed in the housing
are correctly connected so that the insulated housing requirements relating to
clearance and creepage lines can be adhered to when the equipment is used
correctly.
4. Close the housing. During this process make sure that the housing is correctly
sealed (all screws tightened firmly …).
4 MOUNTING AND CONNECTION
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2.3
2.4
3.1 1.2
1.13.2
3.1
3.2
1.2
1.1
3.3
3.4
1.2
1.1
1.2
1.1
2.3
2.4
5.1
3.X21.15.2
3.X11.2
With two positive opening normally
closed contacts, one normally
open contact and illumination
connection
With one positive opening
normally closed contact
With one positive opening
normally closed contact and one
normally open contact
With two positive opening
normally closed contact
With two positive opening
normally closed contact and one
normally open contact
Figure 2: Pushbuttons and switching elements for the surface-mounted version and their mount‐
ing
MOUNTING AND CONNECTION 4
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5 Checks before initial commissioning
Mechanical function test
•The pushbutton is fastened so that it cannot be turned.
•The mounting nut is tightened so that no gap is detectable in the longitudinal
direction.
•The emergency stop pushbutton engages on actuation.
Electrical function test:
1. Start the machine.
2. Actuate the pushbutton.
DANGER
Check that the machine stops!
bObserve whether the machine stops when the emergency stop pushbutton is
actuated.
5 CHECKS BEFORE INITIAL COMMISSIONING
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6 Recurring technical checks
Do regular monitoring to ensure smooth and permanent function. The inspection inter‐
val must be determined by the machine designer using the risk assessment. However,
we recommend having the emergency stop pushbutton triggered at least once a year
by the responsible safety representative for test purposes and checking for proper
function:
•Mechanical and electrical function test, see "Checks before initial commissioning",
page 10
•Safe mounting of components
•No manipulation and damage detectable
•Cable entry tightness
•No loose cable connections
RECURRING TECHNICAL CHECKS 6
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7 Response to malfunctions
DANGER
In the event of mechanical overload or external exertion of force, the emergency stop
pushbutton can be damaged and the function impaired.
bPerform a function test in this case, see "Checks before initial commissioning",
page 10.
7 RESPONSE TO MALFUNCTIONS
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8 Deinstallation
DANGER
bDisconnect the system and device from the mains before beginning disassembly!
DEINSTALLATION 8
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9 Disposal
Approach
bAlways dispose of unusable devices in accordance with national waste disposal
regulations.
Complementary information
SICK will be glad to help you dispose of these devices on request.
9 DISPOSAL
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10 Technical specifications
Pushbuttons
Table 1: Pushbuttons ES21-A*****
Housing material Plastic
Enclosure rating
Without illumination
With LED illumination

IP65 (IEC 60529)
IP54 (IEC 60529)
Ambient operating temperature
Without illumination
With LED illumination

–30 … +70 °C
–30 … +55 °C
Storage temperature –50 … +85 °C
Switching operations > 50000
Max. torque 2,5 Nm
Installation diameter 22,3 mm
Complete sets
Table 2: Complete sets ES21-S*****
Housing material Plastic
Enclosure rating
Without illumination
With LED illumination

IP65 (IEC 60529)
IP54 (IEC 60529)
Protection class II
Ambient operating temperature –25 … +60 °C
Storage temperature –25 … +85 °C
Switching elements
Positive opening normally closed contacts/nor‐
mally open contacts
Je nach Typ:
1/0, 1/1, 2/0, 2/1
Cable entry 2 × M20
B10D-value 250000 Switching operations
Mechanical life (at +20 °C) 50000
Electrical data see table 3, page 16
TECHNICAL SPECIFICATIONS 10
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Switching elements
Table 3: Switching elements ES21-C***0*
Protection class II
Ambient operating temperature
Without illumination
With LED illumination

–30 … +85 °C
–30 … +65 °C
Storage temperature –50 … +85 °C
Switching principle for switching elements Slow action switching element
Usage category AC15 A600: 250 V AC 3 A DC13 Q600: 24 V
DC 2 A
(EN 60947-5-1)
Rated insulation voltage Ui600 V
Connector technology (contacts) Screw connection
Minimum switching voltage 5 V
Minimum switching current 1 mA
Max. wire cross-section 2,5 mm²
Thermal continuous current Ith16 A
Max. contact resistance 20 mΩ
Max. bounce time 10 ms
Min. positive opening travel 3 mm
Rated current Ie / rated voltage Ue16 (10) A at 250 V AC
10 (6) A at 440 V AC
(EN 61058-1)
B10D-Wert 250000 Switching operations
Mechanical life 1 × 106 Switching operations
Electrical service life (at rated load) 1 × 106 Switching operations
Contact material AgNi
Actuating travel 6 mm
Switching element with illumination connection
Table 4: Switching element with illumination connection ES21-C***1*
Electrical data see table 3, page 16
Protection class II
Max. wire cross-section 2,5 mm²
Connector technology Screw connection
Storage temperature –50 … +85 °C
Operating voltage 12 … 30 V AC/DC
Operating current 8 … 44 mA
LED service life 100000 h
(T = 25 °C, I = 20 mA)
70000 h
(T = 55 °C, I = 20 mA)
Connecting wire 10 cm, crimped BKL plug con‐
nector, crimped BKL plug connector
0,25 mm²
Connection X1: anode X2: cathode
10 TECHNICAL SPECIFICATIONS
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11 Dimensional drawings
24,1
+0,4
9
1 … 7
2,2 +0,2
22,3
+0,4
2,2
+0,2
19,5
24,1
+0,4
22,3
+0,4
Ausführung ohne Beleuchtung Ausführung mit Beleuchtung
Figure 3: Dimensional drawings of the mounting holes for the built-in versions (mm)
Æ
31,5
19,4
Æ
31,5
Æ
55
Æ
67
Æ
31,5
Æ
32
41,5
1
…
7
19,4
42
1
…
7
19,4
42
1
…
7
61
61
Figure 4: Dimensional drawings of the pushbuttons (mm)
36,8 27 36,8
45,3
51
44,6
51
44,6
Figure 5: Dimensional drawings of the switching elements (mm)
DIMENSIONAL DRAWINGS 11
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Æ
31,5
72
M20
41,5
61,5
39
59
72
Æ
4,2
Æ
4,2
Figure 6: Dimensional drawing for the surface-mounted version (mm)
11 DIMENSIONAL DRAWINGS
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12 Conformities and certificates
You can obtain declarations of conformity, certificates, and the current operating
instructions for the product at www.sick.com. To do so, enter the product part number
in the search field (part number: see the entry in the “P/N” or “Ident. no.” field on the
type label).
12.1 EU declaration of conformity
Excerpt
The undersigned, representing the manufacturer, herewith declares that the product is
in conformity with the provisions of the following EU directive(s) (including all applicable
amendments), and that the standards and/or technical specifications stated in the EU
declaration of conformity have been used as a basis for this.
•ROHS DIRECTIVE 2011/65/EU
•MACHINERY DIRECTIVE 2006/42/EC
12.2 UK declaration of conformity
Excerpt
The undersigned, representing the following manufacturer herewith declares that this
declaration of conformity is issued under the sole responsibility of the manufacturer.
The product of this declaration is in conformity with the provisions of the following
relevant UK Statutory Instruments (including all applicable amendments), and the
respective standards and/or technical specifications have been used as a basis.
•Restriction of the Use of Certain Hazardous Substances in Electrical and Elec‐
tronic Equipment Regulations 2012
•Supply of Machinery (Safety) Regulations 2008
CONFORMITIES AND CERTIFICATES 12
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13 Ordering information
Pushbuttons
Table 5: Pushbuttons
Artikel Type code Part number
Unlocked by turning (ES21-AT1110) 5321156
With jamming protection, unlocked by turning (ES21-AT1120) 5321157
Illuminable, with jamming protection, unlocked
by turning
(ES21-AT1130) 5321158
With jamming protection, unlocked using a key (ES21-AK1120) 5321163
Illuminable, with jamming protection, unlocked
using a key
(ES21-AK1130) 5321164
With protective collar, unlocked by turning (ES21-AT1140) 5321165
Illuminable, with protective collar, unlocked by
turning
(ES21-AT1150) 5321166
With protective collar, unlocked using a key (ES21-AK1140) 5321167
Illuminable, with protective collar, unlocked
using a key
(ES21-AK1150) 5321168
Switching elements
Table 6: Switching elements
Part Type code Part number
1 positive opening normally closed contact
with contact module for selfmonitoring
ES21-CG1001) 6036139
2 positive opening normally closed contacts
with contact module for selfmonitoring
ES21-CG2001 6036140
1 positive opening normally closed contact + 1
normally open contact with contact module for
self-monitoring
ES21-CG1101 6036141
2 positive opening normally closed contacts +
1 normally open contact with contact module
for self-monitoring, with illumination
ES21-CH2111 6036143
2 positive opening normally closed contacts +
1 normally open contact with contact module
for self-monitoring
ES21-CH2101 6036144
3 positive opening normally closed contacts
with contact module for selfmonitoring
ES21-CH3001 6035721
Complete sets
Table 7: Complete sets
Part Type code Part number
Housing with pushbutton fitted, with jamming
protection, unlocked by turning, incl. switch‐
ing element with 1 positive opening normally
closed contact
ES21-SA10C1 6036145
As above, incl. switching element with 1 posi‐
tive opening normally closed contact + 1 nor‐
mally open contact
ES21-SA10D1 6036146
As above, incl. switching element with 2 posi‐
tive opening normally closed contacts
ES21-SA10E1 6036147
13 ORDERING INFORMATION
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