In this briefing we explore the Preventa XY2SB offer presentation and application samples. For more details: https://www.schneider-electric.com/en/product-range/1533-preventa-xy2-sb#search

1. Preventa XY2SB
Two-hand control system
Briefing
Property of Schneider Electric
Simply reliable. Simply available.
December 2017

2. • Introduction to the Harmony/Preventa offer
• Introduction to two-hand control systems
 What is it used for?
 How should it be electrically designed?
 How should it be mechanically designed?
 What safety category should it be compliant with?
• Preventa two-hand control solution panorama
 Complete individual protection
 Robustness in harsh environments
 Health and greater comfort for the machine
operator
• Targeted applications
• Where to find further details
• Quiz
Table of content
Agenda
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3. General purpose control
Control offers overview – Harmony and Preventa control units
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Hoisting Safety
Pushbuttons, switches, and pilot lights Wireless remote control Foot switches and
two-hand control
Control stations
XALD/K XALGXALE XAPXALF
XB5R/XB4R XB5S/Ø 22
9001K/SK/Ø 30 XVL/Ø 8-12XB6/Ø 16 K Cam
XB4/Ø 22 XB5/Ø 22 XB7/Ø 22
XKB XKMXKD
Seat and joysticks
eXLhoist
Pendant station XPE Y/B/G XPE M/R
Preventa XY2 SB
XB4 ATEX D
Explosive atmosphere

4. Two-hand control stations can be used on stamping
presses for setting operations.
• The two-hand control is a safety-related function to help contain the
location of the operator's hands outside the hazardous area, during
a hazardous movement of the machine
• The two-hand control system is defined in EN 574 and
ISO 13851 standards
• Its actuation requires a simultaneous operation by both hands on
actuators, in order to start and maintain operation of a machine
What is a two-hand control used for?
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5. The functional channel is represented by the two-hand
control actuator device (S3 and S4) that corresponds to the
input block.
The safety controller or safety relay corresponds to the
logic block(L1/2), which maintains the internal redundancy
of the safety circuits.
The output is represented by two redundant contactors
(K1 and K2) that are monitored by the logic block
(safety modules) to detect failure.
• To initiate a dangerous movement with a two-hand control system,
both actuators (two-hand control pushbuttons – S3 and S4 - see
diagram below) must be activated simultaneously, which means
within an interval less than 0.5 seconds to energize the contactors
(K1 and K2)
‒ When at least one of the two pushbuttons is released, the energization
is cancelled and remains blocked until both pushbuttons are released
and pressed again synchronously
• A logic device, a safety module or controller, which complies with
the requirements of EN 574/ISO 13851 for two-hand control
systems, should be used to monitor the operation and
detect failure
How should a two-hand control be electrically designed?
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The complete definition of the design of the two-hand control system is given in EN 574 and ISO 13851 standards

6. • The control stations must be designed and installed such that they
cannot be activated involuntarily
• The protective effect of the two-hand control device must not be
easily defeated or rendered inoperative
• The safety distance between the control units and the
hazardous zone must be sufficient to ensure that when only one
operator is released, the hazardous zone cannot be reached before
the dangerous movement has been completed or stopped
‒ According to the application and the machine design, the two-hand
control station can be mounted either directly on the machine housing,
or on a pedestal at a safe machine distance
How should a two-hand control be mechanically designed?
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Separation by
distance
Separation
by shields
Position on a horizontal
surface at least 1m10
above floor
Those mechanical design examples enable to prevent
accidental actuation and defeats, and comply with EN 574
and ISO 13851 standards.
Mounting on the
machine housing
Mounting on a pedestal
The complete definition of the design of the two-hand control system is given in EN 574 and ISO 13851 standards

7. • The safety category of the two-hand control system
defines the behavior of the parts of a two-hand control
device in the case of failure
• According to the application and the design of the machine,
the required safety category is chosen in accordance with
ISO 13849-1 (safety of machinery standard)
• The safety category of the two-hand control device must
not be less than the category of control of the relevant
safety related part of the machine control system
• The table below describes the relationship between the
types of two-hand control devices and the categories
according to ISO 13849-1
What safety category should the two-hand control be compliant with?
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Use of categories (in accordance with ISO 13849-1) in types of two-hand control device.
The complete definition of the design of the two-hand control system is given in EN 574 and ISO 13851 standards

8. Preventa two-hand control solution panorama
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2-hand control stations
XY2SB
2-hand control desk
XY2SB714
XY2SB724
Safety modules
XPSBAE XPSBCE XPSBF
Description • Control station equipped with 2 control
pushbuttons with ‘N/C+N/O’ break before
make contacts and 1 mushroom emergency
stop pushbutton head.
• Available with or without pre-wired terminal
blocks
• Control station, with or without pre-wired
terminal blocks, and a pedestal
• Safety modules for electrical monitoring of two-
hand control stations
• With 1 or 2 N/O safety circuits
• Additional outputs: 1 N/C contact or 2 solid-
state relays
• Fully complies with EN 574/ISO 13851 for two-
hand control systems.
Material Housing made of highly strong die-casted aluminum, metal XB4 pushbuttons
Mechanical life 1 million operating cycles
Degree of protection IP65 Enclosure: IP40
Certification CE, EAC UL, CSA, TUV, BG
Maximum safety level PL e, category 4 conforming to EN/ISO 13849-1 and SIL 3 conforming to EN/IEC 61508
Potential safety
requirements
(according to the safety
level required by the
application)
• Use of proven components (category 1 conforming to EN/ISO 13849-1)
• Redundancy with partial error detection (category 3 conforming to EN/ISO 13849-1)
• Redundancy + Self-monitoring (category 4 conforming to EN/ISO 13849-1)

 
 

9. A comprehensive solution for a complete individual protection
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Preventa XY2SB desk
with very strong and
adjustable pedestal
Enables 3 directional
adjustments: height, rake,
skew.
Harmony XPEM/R metal foot switch offer
Can be mounted complementarily on the
base plate. It enables actuations without the
use of hands.
XPE foot switches propose various options
including with or without protective cover,
trigger mechanism to prevent from accidental
operations.
See Foot switch range Briefing presentation.
Preventa XPSBAE, XPSBCE, XPSBF
safety modules
Monitor electrically the operation of the
two-hand control and detect failures.
The XPSBAE, XPSBCE, XPSBF offers
comply with EN 574 and ISO 13851.
They propose all safety categories, which
can be required by any applications.
Preventa XY2SB two-hand control stations
Is fully compliant with EN 574 and ISO 13851, and
integrates all recommendations to avoid accidental
actuation or defeat.
It includes one metal mushroom emergency stop
pushbutton head.
It has five cut-outs (Ø 22 mm) as standard.
Five additional cut-outs are possible.
It can be supplied with or without pre-wired terminal
blocks.
height
rake
skew

10. High resistance to oil
• Extreme robustness for demanding environments
• Resistance to shocks (fall of heavy objects)
• Resistance to oil, water, dust: IP 65 conforming to
EN/IEC 60529
• Very long mechanical life: 1 million operating cycles
Robustness in harsh environments
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11. Various hand positions allow greater comfort
for use.
• The ingenious ergonomics of the two-hand control station
incorporates features to significantly reduce work-related illnesses,
particularly “carpal tunnel syndrome”
• The comfort of each user is assured by:
‒ The diverse hand positions for operating the 2 pushbutton actuators,
enabled by the hand rail
‒ Simple and fast adjustments of the control station position.
• Preventa XY2SB two-hand control fully complies with EN 999
standard (Safety of machinery. Positioning of protective equipment
in respect of approach speeds of parts of the human body)
Health and greater comfort for the machine operator
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12. • Two-hand control stations are designed to provide protection against hand injury for numerous machine
types, among which:
Preventa XY2SB two-hand control for diverse applications
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Hydraulic presses Guillotine shears Manual assembly stationWood working

13. • Click here to find info on SE.com
• Click here to find XY2SB on SE.com
• Click here to find XPSBAE/BCE/BF on SE.com
• Click here to find the complete two-hand control
Safety Chain Solution on SE.com
• Click here to access our Digicat
• Click here to access to CAD files
• Click on the link below for FAQs
(frequently asked question)
Where to find details
Page 13Property of Schneider Electric |

14. Property of Schneider Electric |
Quiz
Based on what
you’ve learned so
far, try to answer to
this quiz
?
Page 14
What is a two-hand control system used for?
Q1
Should the actuations of the two-hand control be electrically monitored?
Q2
What is the minimum mechanical life of XY2SB two-hand control station?
Q4
How is the comfort on Preventa XY2SB two-hand control stations improved?
Q5
Does Preventa offer proposes a solution for a complete two-hand control system compliant with EN
574 and ISO13851 standards?
Q3

15. Property of Schneider Electric |
Quiz answers
What is a two-hand control system used for?
Q1
A two-hand control system provides protection against hand injury. This function is
defined by EN 574 and ISO 13851 standards.
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Answers
Should the actuations of the two-hand control be electrically monitored?
Q2
Yes, the simultaneous actuation on both actuators should be monitored by a safety
module to detect failure.
What is the minimum mechanical life of XY2SB two-hand control station?
Q4
The minimum mechanical life of XY2SB two-hand control station offer is 1 million
operating cycles.
How is the comfort on Preventa XY2SB two-hand control stations improved?
Q5
An hand rail enables various hand position, and the position of the control station can be
easily adjusted.
Does Preventa offer proposes a solution for a complete two-hand control system compliant with EN
574 and ISO13851 standards?
Q3
Yes, Preventa offer proposes a complete solution. Both two-hand control stations and
safety modules are compliant with the standards, and the safety modules propose all
safety categories.

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Thank you