This document is a translation of the original document.
All rights to this documentation are reserved by Pilz GmbH & Co. KG. Copies may be made
for internal purposes.
Suggestions and comments for improving this documentation will be gratefully received.
Pilz
®
, PIT®, PMI®, PNOZ®, Primo®, PSEN®, PSS®, PVIS®, SafetyBUS p®, SafetyEYE®,
SafetyNET p®, the spirit of safety® are registered and protected trademarks of
Pilz GmbH & Co. KG in some countries.
SD means Secure Digital.
Preface
Contents
Contents
ContentsPage
Chapter 1Introduction
1.1Validity of the documentation1-2
1.2Overview of documentation1-3
1.3Definition of symbols1-5
Chapter 2Overview
2.1Scope of supply2-3
Chapter 3Safety
3.1Intended use3-1
3.1.1Approvals3-2
3.1.2Safety during operation3-2
3.1.2.1Hazards arising from the installation of the
This operating manual contains information about the intended operation of the PSENvip. The PSENvip is a camera-based protection system
for press brakes.
This operating manual is aimed at manufacturers, company operators
and personnel involved in designing, maintaining and operating press
brakes, which are to be safeguarded using the PSENvip.
This operating manual is not an instruction manual for the press brake
that is safeguarded using the PSENvip. Please refer to the press brake
operating manual for this information.
This documentation is intended for instruction and should be retained
for future reference.
1.3Definition of symbols1300Definition of symbols1-Einfhrung Zeichen
Information that is particularly important is identified as follows:
DANGER!
This warning must be heeded! It warns of a hazardous situation
that poses an immediate threat of serious injury and death and
indicates preventive measures that can be taken.
WARNING!
This warning must be heeded! It warns of a hazardous situation
that could lead to serious injury and death and indicates preventive measures that can be taken.
CAUTION!
This refers to a hazard that can lead to a less serious or minor
injury plus material damage, and also provides information on
preventive measures that can be taken.
NOTICE
This describes a situation in which the unit(s) could be damaged
and also provides information on preventive measures that can
be taken. It also highlights areas within the text that are of particular importance.
INFORMATION
This gives advice on applications and provides information on
special features.
The PSENvip is a camera-based protection and measuring system
(electrosensitive protective equipment) for press brakes. It consists of a
transmitter and receiver. The PSENvip monitors the detection zone between the transmitter and receiver below the moving upper tool.
Transmitter
Generates parallel beam
2 inputs for controlling the light source
Receiver
Evaluates the light generated by the transmitter
Display for the operating statuses and inputs
Membrane keypad for operating the menus and for inputs
Max. distance between transmitter and receiver: 10 m
Uebersicht_Merkmale_Empfaenger_Ausgaenge
Uebersicht_Merkmale_Empfaenger_Ausgaenge_Mute
Uebersicht_Merkmale_Empfaenger_Ein_Aus_Zusatz
Uebersicht_Merkmale_Empfaenger_LED
Uebersicht_Merkmale_Betriebszustaende
Inputs
1 input for setup mode
1 input for signalling when the press brake is at top dead centre
2 inputs for controlling the protected field mode:
Protected field can be adapted to a range of bending functions: full
protected field, reduced protected field for box bending and lower
tools with back gauge
1 input for acknowledging the protected field mode
Outputs
2 output signal switching devices (OSSD) for signalling the status of
the protected field (clear or interrupted)
2 outputs for signalling that PSENvip is in dynamic muting
Some inputs and outputs are used for communication with the safety
system during the system status TEST:
Register tool class on safety system
Approve tool class for PSENvip
LED indicators for
Status of OSSDs
Operating statuses
Adjustment for initial commissioning
Tool change
Diagnostics
The PSENvip is exclusively designed for stationary use on press brakes.
As electrosensitive protective equipment (ESPE), the PSENvip meets
the requirements of a type 4 ESPE in accordance with EN 61496-1.
The PSENvip safeguards the danger zone below the moving upper tool.
Danger zones outside of the protected field are not protected. Hazards
in the area of the lower tool and above the protected field must be protected by the press manufacturer with appropriate measures. Please refer to the guidelines given in the "Tool shapes" section in this chapter.
The protected field monitors the danger zone between upper tool and
plate up to a remaining gap of 6 mm (dynamic muting)
Sicherheit_Bestimm_Allg_NLW
Sicherheit_Bestimm_Allg_Zusaetze
The upward movement of the press is assumed as a safe movement.
Use of the PSENvip RL D P Set is only permitted with the automation
system PSS 4000 from Pilz. In the PSS 4000 user program, safety functions must be implemented to safeguard the dynamic muting of
PSENvip:
Monitoring of the pinch point
Monitoring of the press braking ramp
Definition of a safe position and safe speed for the upper tool
Activation of the entire protected field via System-Init = 1, when the
press stops during dynamic muting and then the upward movement
is initiated.
For this safety function Pilz provides a certified evaluation program for
the PSS 4000.
The press brake must observe a max. overrun of 14 mm.
The following is deemed improper use:
Any structural, technical or electrical modification to the PSENvip
Use of the PSENvip outside the zones described in this manual
Use of the PSENvip contrary to the documented technical details (see
chapter entitled "Technical Details")
Intended use includes making the wiring EMC-compliant. Please refer to
the guidelines stated in this manual, in the section entitled "Wiring".
The protective function of the PSENvip must not be adversely affected
by sources of interference, e.g. wireless remote controls for cranes,
welding sparks, strobe lighting effects.
Intended use also includes awareness of the hazards that arise during
operation, against which the PSENvip does not provide protection.
3.1.2.1Hazards arising from the installation of the PSENvip
Hazards arising from the installation of the PSENvip3-Sicherheit_Betrieb_Montage
When installing the PSENvip, please note the following:
The PSENvip must be installed so that there are no crushing or shear-
ing hazards between the moving transmitter/receiver and the fixed
machine parts or any other parts around the machine.
If hazard areas cannot be avoided, other safeguards must be put in
place.
3.1.2.2Hazards arising from a reduced protected field
Hazards arising from a reduced protected field3-Sicherheit_Betrieb_Schutzfeld_reduziert
The full protected field is only active in standard protected field mode.
In box bending or box bending with back gauge protected field mode,
the protected field is reduced. This means there can only be limited protection against trapping and crushing. The protected field is around the
tolerance zone behind the bending line. Any parts of the body within the
danger zone will only be detected behind the bending line. There is a risk
of injury from trapping or crushing.
3.1.2.3Hazards arising from incorrect handling of the workpiece
Hazards arising from incorrect handling of the workpiece3-Sicherheit_Betrieb_Handhabung_Werkstueck_falsch
The PSENvip does not protect against hazards arising from incorrect
handling of the workpiece.
When bending metal sheets on press brakes there is a risk of hand injuries
From the tool's closing movement
From the swivel movement of the parts of the metal sheet that pro-
trude from the tool and
From the dropping of the metal sheet when the tool is opened.
So please note the following:
You can avoid crushing and trapping of fingers or hands if the work-
piece is handled correctly.
Wear protective gloves to prevent cuts from edges, corners and ridg-
es.
3.1.2.4Correct handling of the workpiece
Correct handling of the workpiece3-Sicherheit_Warnung_Quetschen_1
WARNING!
Crushing and trapping of fingers or hands!
With box bending and/or back gauge bending mode, the protected field is partly blanked.
Around the bending line there is an increased risk of crushing
and trapping of fingers or hands.
The PSENvip may only be used with an automation system PSS 4000
from Pilz with SIL 3 of EN 61508 and PL e of EN ISO 13849-1.
Please note: To achieve the corresponding category or SIL, the whole
system including all safety-related components (parts, devices, user
program etc.) must be included in the assessment. For this reason, Pilz
cannot accept liability for the correct classification into a category or
SIL.
All tool shapes are permitted in principle. They are divided into tool
classes by the PSENvip. Classification is based on EN 12622, according
to which the protected field must safeguard areas lying 15 mm in front
of the bending line.
INFORMATION
Please refer to the information on tool classes
In the section entitled "Adjustment during tool change", under
"Commissioning".
In the section entitled "Requirements of the user program", un-
der "System Connections".
Please note the following when using tools:
Tool class 1
These tools can be safeguarded in compliance with the standards:
The front and rear bending lines are detected by the protected field
on the PSENvip. The front segments of the protected field are more
than 15 mm away from the front bending line.
Upper tools with a width of max. 32 mm or radius of max. 25 mm.
Press brakes can travel up to the regular switchover point at high
closing speed.
3-6
Tool class 2
These tools cannot be safeguarded in compliance with the standards:
The front and rear bending lines are detected by the protected field
on the PSENvip. The front segments of the protected field are less
than 15 mm away from the front bending line.
Upper tools with a width of max. 43 mm or radius of max. 50 mm.
The following safety guideline applies for press brakes with tools in
this tool class.
WARNING!
Crushing and trapping of fingers or hands!
There may be additional hazard areas in zones that are not monitored by the PSENvip.
In these zones there is an increased risk of crushing and trapping of fingers or hands.
Secure these zones with appropriate additional measures!
– Carry out a hazard analysis!
– Raise the regular switchover point, which initiates braking at
low speed! The switchover point must be monitored by the
safety system.
Tool class 3
These tools cannot be safeguarded in compliance with the standards:
The front and rear bending lines are not detected by the protected
field on the PSENvip.
The following safety guideline applies for press brakes with tools in
this tool class.
WARNING!
Crushing and trapping of fingers or hands!
There may be additional hazard areas in zones that are not monitored by the PSENvip.
In these zones there is an increased risk of crushing and trapping of fingers or hands.
Secure these zones with appropriate additional measures!
– Carry out a hazard analysis!
– Raise the switchover point, which initiates braking at low
speed. It must be placed even higher than the position used
for tools of tool class 2. The switchover point must be monitored by the safety system.
– Each press stroke must be acknowledged by the operator
Please also note the following guidelines in danger zones in areas that
cannot be detected and monitored by the safeguard.
Example: Upper tool with a danger zone outside the zone monitored by
the PSENvip
Fig. 3-3:Danger zone in unmonitored zone
Example: In unmonitored zones, the use of tools which are not fully detected by the protected field on the PSENvip (e.g. tools with a radius
greater than 25 mm) will lead to the risk of fingers or hands being
crushed or trapped!
3-8
Fig. 3-4:Crush points when the tool is wider than the protected field
To use the PSENvip correctly you will need to have a good knowledge
of the relevant standards and directives. The following gives an overview
of the most important standards:
EN 61496-1:2004: Safety of machinery - Electrosensitive protective
equipment, Part 1
CLC/TS 61496-2:2006: Safety of machinery - Electrosensitive protec-
tive equipment, Part 2
EN 12622:2009: Machine tools - Hydraulic press brakes
EN ISO 13849-1:2008: Safety of machinery – Safety-related parts of
control systems - Part 1: General principles for design
EN ISO 13849-2:2008: Safety of machinery – Safety-related parts of
control systems - Part 2: Validation
EN 61508:2001: Functional safety of safety-related electrical/elec-
tronic/programmable electronic systems
Please note this is not an exhaustive list of safety standards and directives.
Failure to keep to these guidelines will render all warranty and liability
claims invalid:
All health and safety / accident prevention regulations for the particu-
lar area of application must be observed.
Before using the unit it is necessary to perform a safety assessment
in accordance with the Machinery Directive 2006/42/EC.
Please note that manufacturers and company operators who use the
PSENvip are themselves responsible for agreeing the regulations with
the relevant authorities and complying with them.
3.3.1Use of qualified personnel
Use of qualified personnel3-Sich Qualif. Personal
Sicherheit_Qualifikation_BWS
The products may only be assembled, installed, programmed, commissioned, operated, maintained and decommissioned by competent persons.
A competent person is someone who, because of their training, experience and current professional activity, has the specialist knowledge required to test, assess and operate the work equipment, devices,
systems, plant and machinery in accordance with the general standards
and guidelines for safety technology.
It is the company's responsibility only to employ personnel who:
Are familiar with the basic regulations concerning health and safety /
accident prevention
Have read and understood the safety guidelines given in this descrip-
tion
Have a good knowledge of the generic and specialist standards ap-
plicable to the specific application.
Approved personnel must be familiar with how to use and test ESPE and
be authorised by the ESPE operator to do this.
3-10
3.3.2EMCD
EMCD3-Sicherheit_EMVG
The PSENvip is designed for use in an industrial environment. It is not
suitable for use in a domestic environment, as this can lead to interference.
The PSENvip is a camera-based protection system for press brakes. It
consists of a transmitter and receiver, which are fixed to the moving part
of the press brake, the upper die. The detection zone between the transmitter and receiver monitors the immediate danger zone below the moving upper tool.
The detection zone moves with the upper die, providing mobile safeguarding of the danger zone. If an object encroaches into the detection
zone, both output signal switching devices (OSSD1, OSSD2) on the
PSENvip will switch to the OFF-state. The safety system will use these
signals to initiate stopping of the press stroke.
Fig. 4-1:Press brake with PSENvip
1: Upper tool
2: Upper die
3: Receiver
4: Detection zone
5: Lower tool
Funktion_Gesamtsystem_P_Variante
6: Transmitter
The PSENvip is part of an overall system comprising
PSENvip transmitter and receiver
Programmable safety system PSS 4000
CNC controller
Signals from incremental encoders for defining the position and
speed
External operator elements or signals (foot switch, reset button for re-
duced protected field or setup mode, E-STOP pushbutton)
Other safety devices (safety valves, prefill valve, contactor for E-
STOP)
The following overview shows the fundamentals of the whole system.
The signals from the PSENvip transmitter and receiver are explained in
the sections below.