SICK ES21 M12 contact User manual
OPERATING INSTRUCTIONS
ES21 M12 contact
Safety switches
Described product
ES21 M12 contact
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.
2O P E R A T I N G I N S T R U C T I O N S | ES21 M12 contact 8027995/2023-07-28 | SICK
Subject to change without notice
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 Structure and function............................................................................. 6
4 Mounting and electrical installation............................................... 7
4.1 Mounting and connecting built-in version............................................... 7
5 Checks before initial commissioning............................................. 9
6 Recurring technical checks.............................................................. 10
7 Response to malfunctions............................................................... 11
8 Deinstallation..................................................................................... 12
9 Disposal.............................................................................................. 13
10 Technical specifications................................................................... 14
11 Dimensional drawings...................................................................... 16
12 Conformities and certificates.......................................................... 17
12.1 EU declaration of conformity.................................................................... 17
12.2 UK declaration of conformity................................................................... 17
13 Ordering information........................................................................ 18
CONTENTS
8027995/2023-07-28 | SICK O P E R A T I N G I N S T R U C T I O N S | ES21 M12 contact 3
Subject to change without notice
1 About this document
These operating instructions are original operating instructions.
1 ABOUT THIS DOCUMENT
4O P E R A T I N G I N S T R U C T I O N S | ES21 M12 contact 8027995/2023-07-28 | SICK
Subject to change without notice
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
►Always 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.
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.
The product may be used in safety functions.
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
8027995/2023-07-28 | SICK O P E R A T I N G I N S T R U C T I O N S | ES21 M12 contact 5
Subject to change without notice
3 Product description
3.1 Items supplied
•Complete set with pushbutton including switching element in one package
•Safety note
3.2 Structure and function
The emergency stop pushbutton consists of a pushbutton and an integrated switching
element. The emergency stop pushbutton is a pre-assembled complete device (built-in
version).
When the pushbutton is pressed, the switching element is actuated and the contacts
opened. This allows an emergency stop to be triggered.
The pushbutton engages when pressed and then has to be unlocked manually by
turning the pushbutton.
3 PRODUCT DESCRIPTION
6O P E R A T I N G I N S T R U C T I O N S | ES21 M12 contact 8027995/2023-07-28 | SICK
Subject to change without notice
4 Mounting and electrical installation
4.1 Mounting and connecting built-in version
Approach
1. Planning mounting location: The emergency stop pushbutton must be easily
accessible in the event of an emergency.
2. Drill mounting hole with Ø 22.3mm in the mounting plate.
3. Make sure the surface is smooth to ensure tightness.
4. Insert emergency stop pushbutton through the mounting hole and fasten with nut
(max. tightening torque 1.7Nm) (see table 3, page 14).
Figure 1: Mounting ES21 mini
5. Connect the connecting cable to the male connector (max. tightening torque
0.4Nm).
6. Protect the connecting cable with strain relief. The male connector must not be
strained. For device variants with cable, observe the specified bend radii (see
table 3, page 14).
7. Attach connecting cable to control unit ( see table 1, page 7 and see table 2,
page 8)
Table 1: Pin assignment ES21-MB16Sx
ES21-MB16Sx PIN Description
2 1
4
3
Figure 2: M12 4-pin A-
coded male connector
1 N/C contact
2
3 N/C contact
4
MOUNTING AND ELECTRICAL INSTALLATION 4
8027995/2023-07-28 | SICK O P E R A T I N G I N S T R U C T I O N S | ES21 M12 contact 7
Subject to change without notice
Table 2: Pin assignment ES21-MB16R5
ES21-MB16R5 PIN Description
2 1
4
3
5
Figure 3: M12 male con‐
nector, 5-pin, A-coded
1 Normally closed contact
4
2 Normally closed contact
5
3 Normally open contact
5
4 MOUNTING AND ELECTRICAL INSTALLATION
8O P E R A T I N G I N S T R U C T I O N S | ES21 M12 contact 8027995/2023-07-28 | SICK
Subject to change without notice
5 Checks before initial commissioning
Mechanical function check-out
•The emergency stop pushbutton is fastened so that it cannot be turned.
•The nut is tightened so that no gap is detectable in the longitudinal direction.
•The pushbutton engages when actuated.
•The pushbutton can be unlocked by turning it.
Electrical function check-out
1. Start the machine.
2. Actuate the pushbutton.
DANGER
Check that the machine stops!
►Check whether the machine stops when the emergency stop pushbutton is
actuated.
CHECKS BEFORE INITIAL COMMISSIONING 5
8027995/2023-07-28 | SICK O P E R A T I N G I N S T R U C T I O N S | ES21 M12 contact 9
Subject to change without notice
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 9
•Safe mounting of components
•No manipulation and damage detectable
•Cable entry tightness
•No loose cable connections
6 RECURRING TECHNICAL CHECKS
10 O P E R A T I N G I N S T R U C T I O N S | ES21 M12 contact 8027995/2023-07-28 | SICK
Subject to change without notice
Table of contents
Other SICK Switch manuals
