Maintenance Technology April 2016 - (Page 40)
PROCESS EQUIPMENT
International Standards that Apply
to Emergency Stops vs. Stop Switches
Choose
The Right
Emergency Stop
WITH TODAY'S NUMBER of customizable
available options, selecting the right emergency
stop (e-stop) for process equipment can be a
daunting task, but it's critical for overall safety.
According to human-machine-interface (HMI)
experts at EAO Corp., Shelton, CT, fitting
equipment with a highly functional e-stop in
line with the basic application design concept,
versus a lesser-certified safety switch, is key. MT
Determine if your application requires
Category 0 or Category 1 shutdown.
This is crucial in the placement, size, electrical
specifications, mechanical characteristics, color,
and number of required e-stops.
Research international and North American standards, performance ratings, and
codes that govern your application (see
table).
Each industry has unique regulatory standards.
These restrictions may govern factors such as size,
color, and contact terminals.
Select the product.
Choose your e-stop based on design factors to
meet industry demands and international compliance. Proper selection involves understanding
market and application requirements, environmental conditions, and electrical demands.
Emergency Stop
Stop Switch
Color of
actuator
Actuators of emergency switching off devices shall
be colored RED.
■ EN IEC 60947-5-5 § 4.2.1 ■ EN 60204-1 §
10.8.3 ■ DIN EN ISO 13850 § 4.4.5
Not defined
Actuator/
Background
When a background exists behind the actuator, and
as far as it is practicable, it shall be colored yellow.
■ EN IEC 60947-5-5, 4.2.1 ■ EN 60204-1,
10.8.3 ■ DIN EN ISO 13850 § 4.4.5
Not defined
Inscription
of actuator
The direction of unlatching shall be clearly identified
when resetting is achieved by rotation of the button.
■ EN IEC 60947-5-5 § 4.2.1
Not defined
General
Electrical requirements
Utilization
categories
The utilization categories shall be AC-15 and/
or DC-13 and/or DC-14 in accordance with EN
60947-5-1.
■ EN IEC 60947-5-5 § 5.1
Not defined
Direct
opening
action
All normally closed contact elements of an
emergency stop device shall hav a direct opening
action (positive opening action).
■ EN IEC 60947-5-5 § 5.2
Not necessary
Latching
It shall not be possible for the emergency stop
device to latch-in without generating the emergency
stop signal.
■ EN IEC 60947-5-5 § 6.2.1
Not defined
Resetting
Resetting of the emergency stop shall only be
possible as the result of a manual action at the
location where the emergency stop was initiated.
■ EN ISO 13850, 4.4.4
Not defined
Resetting
The resetting of the latching means shall be by
rotation of the button in the designated direction, or
by a pulling motion.
■ EN IEC 60947-5-5 § 6.3.1
Not defined, but usually
realized by turning
a key, by rotation of the
button in the
designated direction, or
by a pulling motion.
Testing
Robustness A button actuator shall withstand a torque as speciof a button fied below, in both directions of latched actuator and
unlatched positions, where the resetting action requires
activator
rotation of the push-button.
■ EN IEC 60947-5-5 § 7.3.2
Accessorize.
Vendors often provide a variety of unique features
to enhance your e-stop and complete virtually
any application. It's important to research these
additions as some accessories may be mandated by
industry standards.
Consult an expert.
Many suppliers offer consultative services to assist
customers throughout the process of selecting
and integrating their HMI needs, from individual
e-stops to completely designed and produced
'mixed technology' solutions.
For more information on e-stops and
other HMI components and systems,
visit www.eao.com.
40 |
MAINTENANCE TECHNOLOGY
Not defined
Ø
Durability
test
Force
Torque
16 mm
80 N
1.6 Nm
22 mm
110 N
2.2 Nm
30 mm
150 N
3.0 Nm
The test shall consist of 6,050 cycles in which
latching and resetting of the actuator occurs during
each cycle.The movement and actuating forces
shall be consistent throughout the test. Monitoring
of these parameters shall be carried out to ensure
consistency.
■ EN IEC 60947-5-5 § 7.3.3
Not defined
Norms
Mandatory
standards
■ EN IEC60947-5-5 (International Standard)
■ EN ISO 13850 (Safety of Machinery)
■ EN 60204-1 (Safety of Machinery)
Not defined
APRIL 2016
http://www.eao.com
Table of Contents for the Digital Edition of Maintenance Technology April 2016
My Take
Uptime
On The Floor
Culture Changed At This Indiana Refinery
She Ignores The Glass Ceiling
Loadability Studies Aid PRC-025-1 Compliance
Look System-Wide For Cost Savings
Reliable Pumping Supplement
Fund Lubrication Program With Energy Savings
Emergency-Stop Choices
Cyber Security
Backup Generators
Infrared Safety Tips
Internet Of Things
ISO 55000
Motor-Testing Tools Expand Services
Products
Showcase
Ad Index
Final Thought
Maintenance Technology April 2016
https://www.nxtbook.com/atp/MaintenanceTechnology/efficient-plant-jan-feb-2024
https://www.nxtbook.com/atp/MaintenanceTechnology/efficient-plant-april-2022
https://www.nxtbook.com/atp/MaintenanceTechnology/efficient-plant-october-2021
https://www.nxtbook.com/atp/MaintenanceTechnology/efficient-plant-june-2021
https://www.nxtbook.com/atp/MaintenanceTechnology/epapril2021
https://www.nxtbook.com/atp/MaintenanceTechnology/epmarch2021
https://www.nxtbook.com/atp/MaintenanceTechnology/epjanfeb2021
https://www.nxtbook.com/atp/MaintenanceTechnology/epjulyaug2020
https://www.nxtbook.com/atp/MaintenanceTechnology/epjune2020
https://www.nxtbook.com/atp/MaintenanceTechnology/epmay2020
https://www.nxtbook.com/atp/MaintenanceTechnology/epapril2020
https://www.nxtbook.com/atp/MaintenanceTechnology/epmarch2020
https://www.nxtbook.com/atp/MaintenanceTechnology/epfeb2020
https://www.nxtbook.com/atp/MaintenanceTechnology/epjan2019
https://www.nxtbook.com/atp/MaintenanceTechnology/epnovdec2019
https://www.nxtbook.com/atp/MaintenanceTechnology/epseptoct2019
https://www.nxtbook.com/atp/MaintenanceTechnology/epmay2019
https://www.nxtbook.com/atp/MaintenanceTechnology/epapril2019
https://www.nxtbook.com/atp/MaintenanceTechnology/epmarch2019
https://www.nxtbook.com/atp/MaintenanceTechnology/epfebruary2019
https://www.nxtbook.com/atp/MaintenanceTechnology/epjanuary2019
https://www.nxtbook.com/atp/MaintenanceTechnology/epdecember2018
https://www.nxtbook.com/atp/MaintenanceTechnology/epnovember2018
https://www.nxtbook.com/atp/MaintenanceTechnology/epoctober2018
https://www.nxtbook.com/atp/MaintenanceTechnology/epseptember2019
https://www.nxtbook.com/atp/MaintenanceTechnology/epaugust2018
https://www.nxtbook.com/atp/MaintenanceTechnology/0818schneider
https://www.nxtbook.com/atp/MaintenanceTechnology/epjuly2018
https://www.nxtbook.com/atp/MaintenanceTechnology/epjune2018
https://www.nxtbook.com/atp/MaintenanceTechnology/epmay2018
https://www.nxtbook.com/atp/MaintenanceTechnology/epapril2018
https://www.nxtbook.com/atp/MaintenanceTechnology/epmarch2018
https://www.nxtbook.com/atp/MaintenanceTechnology/epfebruary2018
https://www.nxtbook.com/atp/MaintenanceTechnology/epjanuary2018
https://www.nxtbook.com/atp/MaintenanceTechnology/epdecember2017
https://www.nxtbook.com/atp/MaintenanceTechnology/epnovember2017
https://www.nxtbook.com/atp/MaintenanceTechnology/epoctober2017
https://www.nxtbook.com/atp/MaintenanceTechnology/mtsept2017
https://www.nxtbook.com/atp/MaintenanceTechnology/mtaugust2017
https://www.nxtbook.com/atp/MaintenanceTechnology/mtjuly2017
https://www.nxtbook.com/atp/MaintenanceTechnology/mtjune2017
https://www.nxtbook.com/atp/MaintenanceTechnology/mtmay2017
https://www.nxtbook.com/atp/MaintenanceTechnology/mtapril2017
https://www.nxtbook.com/atp/MaintenanceTechnology/mtmarch2017
https://www.nxtbook.com/atp/MaintenanceTechnology/mtfebruary2017
https://www.nxtbook.com/atp/MaintenanceTechnology/mtjanuary2017
https://www.nxtbook.com/atp/MaintenanceTechnology/mtdecember2016
https://www.nxtbook.com/atp/MaintenanceTechnology/mtnovember2016
https://www.nxtbook.com/atp/MaintenanceTechnology/mtoctober2016
https://www.nxtbook.com/atp/MaintenanceTechnology/mtseptember2016
https://www.nxtbook.com/atp/MaintenanceTechnology/mtaugust2016
https://www.nxtbook.com/atp/MaintenanceTechnology/mtjuly2016
https://www.nxtbook.com/atp/MaintenanceTechnology/mtjune2016
https://www.nxtbook.com/atp/MaintenanceTechnology/mtmay2016
https://www.nxtbook.com/atp/MaintenanceTechnology/mtapril2016
https://www.nxtbook.com/atp/MaintenanceTechnology/mtmarch2016
https://www.nxtbook.com/atp/MaintenanceTechnology/mtfebruary2016
https://www.nxtbook.com/atp/MaintenanceTechnology/mtjanuary2016
https://www.nxtbook.com/atp/MaintenanceTechnology/mtdecember2015
https://www.nxtbook.com/atp/MaintenanceTechnology/mtnovember2015
https://www.nxtbook.com/atp/MaintenanceTechnology/mtoctober2015
https://www.nxtbook.com/atp/MaintenanceTechnology/mtseptember2015
https://www.nxtbook.com/atp/MaintenanceTechnology/MTAugust2015
https://www.nxtbook.com/atp/MaintenanceTechnology/MTJuly2015
https://www.nxtbook.com/atp/MaintenanceTechnology/MTJune2015
https://www.nxtbook.com/atp/MaintenanceTechnology/M
https://www.nxtbook.com/atp/MaintenanceTechnology/0415endress
https://www.nxtbook.com/atp/MaintenanceTechnology/MTApril2015
https://www.nxtbook.com/atp/MaintenanceTechnology/MTMarch2015
https://www.nxtbook.com/atp/MaintenanceTechnology/MTFebruary2015
https://www.nxtbook.com/atp/MaintenanceTechnology/MTJanuary2015
https://www.nxtbook.com/atp/MaintenanceTechnology/MTDecember2014
https://www.nxtbook.com/atp/MaintenanceTechnology/MTNovember2014
https://www.nxtbook.com/atp/MaintenanceTechnology/MTOctober2014
https://www.nxtbook.com/atp/MaintenanceTechnology/MTSeptember2014
https://www.nxtbook.com/atp/MaintenanceTechnology/MTAugust2014
https://www.nxtbook.com/atp/MaintenanceTechnology/MTJuly2014
https://www.nxtbookmedia.com