GREIN EFESTO4 Specification sheet

GREIN S.r.l. Via S. G. B. de La Salle 4/A 20132 Milano –Italy Tel [phone] Fax [phone]
www.grein.it | [e-mail] DOC N° D7B40001EE 4 May 2020
“EFESTO4” Safety Light Curtain with multi beams
Instruction use and maintenance

DOC N° D7B40001EE 4 May 2020 pag. 2
“EFESTO4” Multiple beams safety barrier
IMPORTANT REMARKS ON SAFETY
As this device, for the safety of operators working on dangerous machinery, it is
necessary that an authorised person should carry out the installation carefully while
making notes and maintain such records for future instruction and maintenance.
The safety light curtain forms only one link of the safety system.
Therefore, complete system performance remains the responsibility of the machine
builder or end user.
Please observe all technical details and recommendations reported in this
installation/instruction manual without exception and with strict adherence to all applicable
local, National and International Safety Standards and guidelines which may apply to the
machines.
GREIN is not responsible for any dangerous occurs to a not good employ of the
product.

DOC N° D7B40001EE 4 May 2020 pag. 3
“EFESTO4” Multiple beams safety barrier
Summary
GENERAL INFORMATIONS pag. 4
TERMS AND DEFINITIONS pag. 4
TECHNICAL CARATTERISTICS AND FUNCTIONS pag. 5
INSTALLATION GUIDELINES pag. 6
DETERMINATION OF SAFETY DISTANCE pag. 7
MINIMUM DISTANCE TO AVOID THE REFLECTIONS pag. 9
MECHANICAL MOUNTING pag. 10
GROUPING OF BARRIERS pag. 11
MASTER / SLAVE BARRIERS pag. 12
MODELS AND E FUCTION pag. 13
WIRING CONNECTIONS pag. 14
CONNECTING EXTERNAL CONTACTORS pag. 21
EMITTER CONNECTIONS AND FUNCTIONS pag. 22
RECEIVER CONNECTIONS AND FUNCTIONS pag. 22
INDICATION AND DIAGNOSTIC pag. 27
SERVICE AND TEST pag. 31
SETTING UP AND TEST pag. 32
LIST OF MODELS AND CHARACTERISTICS pag. 33
RESPONS TIME FOR MASTER / SLAVE pag. 41
BLANKING FUNCTION pag. 42
MUTING FUNCTION pag. 45
ACCESSORIES - MIRRORS pag. 47
MOUNTING BRACKETS pag. 52
CONNECTION CABLES pag. 55
INTEGRATED SIGNALLING LAMP pag. 55
RELAYS MODULE DIN RAIL pag. 56
EXTERNAL MODULES BOX pag. 57
WARRANTY pag. 61
UE DECLARATION OF CONFORMITY pag. 62

DOC N° D7B40001EE 4 May 2020 pag. 4
“EFESTO4” Multiple beams safety barrier
GENERAL INFORMATIONS
The EFESTO4 light curtain is a optoelectronic system with multi beams ( Electro-Sensitive Protective
Equipment ) type 4 for the protection of body to prevent accident on the machine on dangerous plants
in accordance with International safety standards.
EFESTO4 is formed of an emitter and a receiver unit synchronized through a optic link. The safety out-
put are at solid state with possibility to transform on power with relays inserted on special module.
The wide range of model permit the employ on every field of industrial automation supplying the
protection of the fingers, hand, arm, body, for the movement on dangerous area.
The principal application are presses, robotized areas, highly automated equipment, and many others.
The series EFESTO4 is divided in different models based on the functions implemented.
This system allows the customer to choose the most adequate model of barrier in according to his
requirements. To complete the range are available some interconnection modules to connect the
barrier without to pass to the general panel of machine.
TERMS AND DEFINITIONS
OSSD0 Safety output channel zero.
OSSD1 Safety output channel one.
OSSD STATO ON Condition on which the output permits the flow of current.
OSSD STATO OFF Condition on which the output do not permit the flow of current.
EDM External Device Monitor.
RESET OSSD restart from OFF to ON.
MUTING Temporary suspension of the safety function.
OVERRIDE Manual muting function after a mistake in automatic muting.
Protective height PH
It is the zone in which the test rod will stop the
barrier.
Sensitive height SH
It is the zone covered by the beams.
AActive part of the lens.
B Beam spacing in mm.
Resolution d
It is the minimum object detected on protected
area, Is the dimension necessary for the
obscuration of two adjacent beams.
d = A + B.

DOC N° D7B40001EE 4 May 2020 pag. 5
“EFESTO4” Multiple beams safety barrier
Technical characteristics
Synchronization Tx Rx Optical
Total aperture angle 5°
Wave lenght 940 nm
Resolutions 14, 20, 30, 40, 55, 65, 125, 135, 306, 315 mm
Maximum range 6 - 15 - 30 - 60m depending from the resolution
Protected height from 200 mm to 3000 mm
Maximum speed 3,3 m/s ( of test rod 150mm length )
Output 2 PNP - 500 mA short circuit and overload protected
Connections M12 5 / 8 poles or M23 17 in functions of the model and options
Power supply
24Vcc ± 10% PELV
Response time From 5 to 30ms depending to number of beams
Max connections lenght 100 m
Body Extruded aluminium, 36 x 50, RAL 1.021
IP protection degree IP 65
Relative umidity 5 - 95%
Working temperature 0 ÷ 65 °C
Safety level Ttpe 4 - SIL 3 - SILCL 3 - PL e – Cat. 4
Functions
Reset Selection of the restart of the barrier
Type Automatic or manual
Restart time 100 ms
Blanking Beams exclusion
N of beams 1, 2 or 3 beams
Type Blanking with or without the presence of the object
Selection Through wiring, are not necessary programming modules
MUTING Temporary exclusion of safety function of the barrier
Muting type Two sensors, with contemporaneity control
Muting enable Enable / disable muting function
Override Manual override of muting function
Muting lamp output Output for muting lamp, 24V 500mA max
EDM External Device Monitor
OSSD-S Output signaling of the safety outputs state
MUTE - F Output for signaling of interrupted barrier when muting active
TEST
Simulation of interruption of light curtain beams barrier, to facilitate
the monitoring of the safety of the machine
BARGRAPH 3 led for alignment and indications

DOC N° D7B40001EE 4 May 2020 pag. 6
“EFESTO4” Multiple beams safety barrier
INSTALLATION GUIDELINES
Correct Installation
frontal protection vertical and horizontal protection oblique protection
Incorrect installation
insertion into the insertion between insertion into the
danger zone under the barrier and dangerous dangerous zone above
the barrier zone the barrier
Refer to the standard EN ISO 13855 for a correct installation of the safety device

DOC N° D7B40001EE 4 May 2020 pag. 7
“EFESTO4” Multiple beams safety barrier
DETERMINATION OF SAFETY DISTANCE
Before of the installation it is necessary to calculate the safety distance in order to allow the stop of the
machine before the operator or part of his body enter in the dangerous area ( as described in EN 999
and ISO 13855 ).
Definitions:
S safety distance in mm
T1 response time of machine in ms
T2 response time of curtain in ms
(see TX / RX label)
d resolution of the system in mm
Vertical installation
Models with resolution up to 40mm
The following formula is valid for a distance S included between 100 and 500 mm:
S = 2 (T1 + T2) + 8 (d - 14)
If S results more of 500mm, use the following formula :
S = 1,6 (T1 + T2) + 8 (d-14)
Models with resolution more than 40 and up to 90 mm
S = 1,6 (T1 + T2) + 850
The highest beam must be placed at a minimum height of 900 mm from the installation plane of the
machine, while the inferior beam must be at a height less than 300 mm
Models with resolution more than 90 mm
S = 1,6 (T1 + T2) + 1.200

DOC N° D7B40001EE 4 May 2020 pag. 8
“EFESTO4” Multiple beams safety barrier
DETERMINATION OF SAFETY DISTANCE
Horizontal installation
For all types of light curtains with horizontal installation, to detect intrusion of legs and body, the
distance Sshall be calculated using formula :
S = 1,6 (T1 + T2) + K
where:
K = (1200 - 0.4 H) ) must be > 850 mm
H= height of curtain in mm from ground
Hmust be lower than the working plane, and in any case don’t higher than 1.000 mm
Example using a light curtain with resolution 50 mm height of working plane 800 mm:
T1 = 100ms
T2 = 10 ms
H= 750 mm
K= 1200 - 0.4 x 750 = 900 mm
S= 1.6 (100 + 10) + K = 1076 mm

DOC N° D7B40001EE 4 May 2020 pag. 9
“EFESTO4” Multiple beams safety barrier
MINIMUM DISTANCE TO AVOID THE REFLECTIONS
The beam angle of optic and alignment tolerance for emitter and receiver is 5 degrees. Since reflective
surfaces near the detection zone can cause reflections and therefore non-detection of an object, a
minimum distance Ato the optical axis, should be observed according to the following formula:
A = 44 L where A is in mm, Lis in m
A should never be less than 131 mm
To verify the above, after the installation of the light curtain, is necessary to pass the test rod
through the detection zone, near the emitter, the receiver and in the middle of the detection zone,
verifying that :
If selected the automatic restart the LED OS OFF should remain always ON;
If selected the manual restart the LED BMS should remain always OFF.
If the indication are not as described above, there is a hole in the detection zone due to reflection.
Modify the position of the barrier to avoid the reflection.

DOC N° D7B40001EE 4 May 2020 pag. 10
“EFESTO4” Multiple beams safety barrier
MECHANICAL ASSEMBLY
During the installation it is necessary to verify the right position of emitter and receiver in order to check
that they are in the same plane and axis as shown on the following drawings.
SIDE VIEW :
CORRECT ANGULAR MISTAKE AXIAL MISTAKE
TOP VIEW :
CORRECT ANGULAR MISTAKE AXIAL MISTAKE