Fiessler Espe type 4 User manual

Fiessler Elektronik Kastellstr. 9

D 73734 Esslingen Telefon: +49 711 / 91 96 97-0 Internet: http://www.fiessler.de

Telefax: +49 711 / 91 96 97-50 eMail: [email protected]

Infrared accident prevention safety curtains, ESPE Type 4

ULVT

Operating Instructions

CONTENTS:

Safety Instructions

Application Notes

Installation

Electric Connection

Commissioning

Specifications

FIESSLER

E L E K T R O N I K

Optional

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Barring from hazardous areas Cordoning off areas

Restricting access to areas

Restricting access to areas via tilted mirrors

DIN EN ISO 9001

Reg.Nr. 96007

For over 40 years,

we have proved to be specialists in the

area of optoelectronics.

Our experience is your gain.

Tell us your problems, and we will be

pleased to advise you

FIESSLER

ELEKTRONIK

BA - ULVT

Section Contents Page

1 Safety Instructions 5

2 Prerequisites for the use of safety light barriers 6

Standards and application guidelines

3 System description and application areas 7

3.1 Features 7

3.2 Application areas 7

3.3 Structure 8

3.4 Function 8

3.5 LED displays 8

3.6 Operating modes (with/without restart interlock, with/without contactor check, equivalent/antivalent outputs) 9

4 Installation 10

4.1 Safe distances from hazardous areas 10

4.1.1 - Vertical protection for hazardous areas 10

4.1.2 - Horizontal protection for hazardous areas 11

4.2 Construction requirements 12

4.2.1 - Installation without additional screening 12

4.2.2 - Protection against reaching over or under barriers 12

4.2.3 - Protection against avoiding barriers through cascading or additional screening 12

4.2.4 - Distance from reflective surfaces 13

4.2.5 - Arrangement of two safety light barriers 13

4.3 Attachment of transmitters and receivers - Mounting and adjustment 14

4.4 Option: Multi-sided screening through tilted mirrors 15

4.5 Option: Assembly columns 15

5 Electric connection 17

5.1 Integrated connector plug 17

5.2 Electric connection ratings 17

5.3 Connectors 17

5.4 Connection examples 18

6 Commissioning 19

6.1 Commissioning 19

6.2 Adjustment instructions 19

6.3 Troubleshooting 20

7 Additional functions with safety switchgears 21

7.1 LSUW N1 Muting K switchgear - Muting (temporary bridging) 21

7.1.1 - Muting function with four muting sensors and time-out 22

7.1.2 - Muting function with four muting sensors without time-out 23

7.2 LSUW NSR 3-1 K switchgear (operating modes "B" and "C" only with system changeover from LSUW to ULVT) 24

7.2.1 - Cycle mode 24

7.2.2 - Safety mode with restart interlock "B" (only with system changeover from LSUW to ULVT) 25

7.2.3 Selection mode (between cycle and safety mode with restart interlock, switchover mode) 26

7.2.4 - Safety mode with restart interlock during dangerous movement "B1" only 27

7.2.5 - Safety mode without restart interlock with valve or contactor check "C" (only when changing system) 28

7.3 ULSG switchgear (potential-free switching contacts and universal power supply) 29

8 Terminology 30

9 Specifications 32

10 Dimensions drawing 34

11 Accessories 37

FIESSLER

ELEKTRONIK

Table of Contents

BA - ULVT

FIESSLER

ELEKTRONIK

BA - ULVT

All safety instructions are marked with this symbol and must be observed under all circumstances.

These operating instructions provide the user with important information concerning the proper use of the ULVT safety light

barriers. The instructions are supplied with each light barrier and must be retained at the installation site of the light barrier.

All specifications of these operating instructions must be observed at all times.

Currently effective conditions and the regulations of the trade associations must also be adhered to.

The operating instructions must be read before using the ULVT ... safety light barriers.

Qualified personnel

Installation, commissioning and maintenance must only be carried out by qualified personnel.

Danger sign

When operating a machine with ULVT ... safety light barriers, it must be ensured that nobody is located within a

hazardous area. A danger sign to this effect must be attached to the machine.

Protect light barriers against flying objects resulting from the operation of the machine.

Caution, daily inspection (after 24 hours at the latest):

Before the start of a shift, the light barrier must be checked as follows:

Using the test rod*, the light barrier is to be interrupted on the transmitting side from start to finish in such a way that

the light field is only covered by this part.

The green LED (or the yellow LED in the operating mode with restart interlock) must not light up from start to finish.

* The diameter of the test rod must correspond to the obstacle size specified on the nameplate of the receiving

side.

FIESSLER

ELEKTRONIK

The safe operation of the entire system can only be ensured through

adherence to these operating instructions and the corresponding accident

prevention regulations. These operating instructions comprise part of the

light barrier and must be retained at the installation site.

Safety Instructions Please observe

BA - ULVT

When using safety light barriers, the effective standards and guidelines must be observed! (The local authorities or

trade associations will provide you with the relevant information.

On request by the customer, the Fiessler Elektronik company will carry out the initial approval and annual inspection. In

addition, customer-training seminars concerning the implementation of the annual inspection are held at regular intervals.

FIESSLER

ELEKTRONIK

2 Prerequisites for the use of safety light barriers

- The unintentional repetition of a hazardous movement

must be prevented by the appropriate safety facilities.

- The safety category (Type 4) of the accident-prevention

light barrier should be at least the same as safety

category of the machine.

- Approval:

Approval of the construction and the tests should be

carried out by competent personnel who are in

possession of all information provided by the supplier of

the machine and the BWS.

- Annual inspection:

The operator must ensure that a competent person is

assigned the task of inspecting the light barrier on a

yearly basis. This person may, for example, comprise an

employee of the light barrier manufacturer or of the

operator.

BA - ULVT

- It must be possible for the hazardous condition of a

machine to be eliminated by the sensor function.

- The safety distance between the protective field and the

hazardous area must be large enough to ensure that

when penetrating the protective field, the hazardous areas

cannot be reached before the hazardous movement is

interrupted or ended.

- Access to the hazardous area must only be possible

through the protective field (reaching under, over or

around the field must not be possible.

-Passing through the light barrier must only be possible

if the restart interlock is activated subsequent to the light

barrier being interrupted.

A new command to activate the next hazardous

movement must only be implemented via a dead-man

switch. It must not be possible for this start button to be

actuated from within the hazardous area: The switch must

be located at a point from which the accessible area can

be viewed without obstruction.

FIESSLER

ELEKTRONIK

3.1 Features

The ULVT safety light barriers are photo-electric guards and are characterized by the following:

- Safety category 4 pursuant to EN 954-1 and IEC 61496 Part 1 + 2, and/or EN 61496

- Integrated switchgear, contactor check and restart interlock activated via DIP switch

- Direct connection of contactors / valves, switching capacity of 0.5 A / 24 V

- Smallest safety distance through short response times: 6 ms to 25 ms, depending on construction length

- Detection of smallest obstacles from range of 14 mm / 30mm to 7 m /24 m

- 13 to 247 beams at protective field heights of 100 mm to 1900 mm

- Microprocessor monitoring of the safety functions

- Reverse-read semi-conductor outputs with line interruption, short-circuit and cross-circuit monitoring

- Integrated self-diagnostics with fault indication

- Muting and cycle mode with optional safety switchgear

- Protection category IP 65

3.2 Application areas

The ULVT safety light barriers are designed to protect hazardous areas, cordon off areas, and prevent access.

Protection of fingers, hands and body, for example in

- Presses for the processing of metal, wood, plastic, rubber, leather and glass

- Filter presses

- Folding and bending machines

- Injection moulding machines

- Processing centres and welding presses

- Automatic placement machines

- Robots

- Palletizing machines

Using tilted mirrors, the protective field can be "wrapped around" a hazardous area, thus ensuring protection from several sides

(Fig. 7/4).

Fig. 7/1 Protecting in hazardous areas Fig. 7/2 Cordoning off areas

Fig. 7/3 Restricting access to areas

3 Features

Fig 7/4 Restricting access to areas via tilted mirrors

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BA - ULVT

FIESSLER

ELEKTRONIK

3.3 Structure

The ULVT safety light barriers consist of two components: The light

transmitter and receiver. The distance between the two components and

the installation height are calculated from the width and height of the

protective field (Fig. 8/1).

Due to its modular structure, protective field heights between 100 mm and

1900 mm can be attained (Table 8/1). Special sizes can be implemented

for installation-dependent dimensions.

The transmitter and receiver and synchronous, i.e., at any one time, only

one light beam and one receiving element are active. Synchronization is

implemented by the first light beam and first receiving element. An electric

connection between the transmitter and receiver is therefore not required.

3.4 Function

The transmitter generates infrared light beams which are switched on an

off in quick succession. The parallel light beams at a distance of 7.5 mm

are assessed by two single-chip microcontrollers. The beam distance

produces a definition of 14 mm.

If an object is located within the protective field, i.e., at least one of the

light beams is blacked out, the two outputs of the receiver will stop the

hazardous movement of the machine and/or prevent a start. In the

operating mode with restart interlock, the machine can only be restarted

by actuating the start button when the protective field is free again.

3.5 LED displays

Several LEDs on the receiver indicate the current operating status (Fig.

8/3). If the system test detects an internal or external fault, the machine

will be switched off immediately and the LEDs on the transmitter and/or

receiver indicate the fault status to the user.

Self-diagnostics system: A fault diagnostics program is available for

trained service personnel. This program provides precise and on-site

localization of the fault. When a fault is present, the flashing LEDs together

with a fault code provide visual output of the detected fault and display in

the diagnostics device.

3 System description and application areas

Fig. 8/1 The transmitter and receiver form the protective field

Table 8/1 Standard construction sizes

Fig. 8/3 LEDs indicate the operating and/or fault status

Test rod dia. = Obstacle size

Protective field width

Protective field height

Transmitter

Receiver

Yellow ON Transmitter active

Yellow OFF Transmitter off

Yellow flashing Fault

Green ON Light barrier free

Red ON Lightbar.interrupted

Orange ON Contamination

(no reserve)

Yellow ON Start prompt

Orange flashing Fault

Yellow flashing Fault

Sender ein Transmitter on

12 3

ULVT

TÜV Rheinland

Made in Germany

D-73734 Esslingen, Kastellstr.9

0711/3 45 19 44

ULVT Transmitter/Emetteur

BWS Typ4, ESPE Type4, ESPS Type4

Emetteur en

marche

ULVTE

Em fänger

Made in Germany

D-73734 Esslingen, Kastellstr.9

0711/91 96 97 -0

1234567

3:OSSD2 6: 0V

2: EDM 7: 24VDC

±20%

4: OSSD1

1: Start

ULVT Receiver/Récepteur

interdiction de

redŽmarrage

restart

interlock

adjustment

LC interrupt

LC free

Aide

d«ˆjustement

libre

interrompu

BWS Typ4, ESPE Type4 , ESPS Type4

Wiederanlauf

Justierhilfe

LS frei

unterbrochen

sperre

Fig 8/2 Dimensions

26 mm 11 mm

59 mm

40 mm

61 mm

ULVTE Empfänger

Made in Germany

D-73734 Esslingen, Kastellstr.9

0711/91 96 97 -0

1234567

3:OSSD2 6: 0V

2: EDM 7: 24VDC

±20%

4: OSSD1

1: Start

ULVT Receiver/Récepteur

interdiction de

redŽmarrage

restart

interlock

adjustment

LC interrupt

LC free

Aide

d«ˆjustement

libre

interrompu

BWS Typ4, ESPE Type4 , ESPS Type4

FIESSLER

Wiederanlauf

Justierhilfe

LS frei

unterbrochen

sperre

E L E K T R O N I K

Protective field height

Construction length L

BA - ULVT

Protective

field height

(mm)

Construc-

tion length

(mm)

Order data

smallest

obstacle

14mm

reaction

time

(ms)

14mm

Order data

smallest

obstacle

30mm

reaction

time

(ms)

30mm

100 196 ULVT100 /13 6 ULVT100 /7 5

200 296 ULVT200 / 26 7 ULVT200 / 14 6

300 396 ULVT300 / 39 8 ULVT300 / 21 6

400 496 ULVT400 / 52 9 ULVT400 / 28 7

500 596 ULVT500 / 65 10 ULVT500 / 35 7

600 696 ULVT600 / 78 11 ULVT600 / 42 8

700 796 ULVT700 / 91 12 ULVT700 / 47 9

800 896 ULVT800 / 104 13 ULVT800 / 56 9

900 996 ULVT900 / 117 14 ULVT900 / 63 10

1000 1096 ULVT1000 / 130 15 ULVT1000 / 70 10

1100 1196 ULVT1100 / 143 17 ULVT1100 / 77 11

1200 1296 ULVT1200 / 156 18 ULVT1200 /84 12

1300 1396 ULVT1300 / 169 19 ULVT1300 / 91 12

1400 1496 ULVT1400 / 182 20 ULVT1400 / 98 13

1500 1596 ULVT1500 / 195 21 ULVT1500 / 105 13

1600 1696 ULVT1600 / 208 22 ULVT1600 / 112 14

1700 1796 ULVT1700 / 221 23 ULVT1700 / 119 15

1800 1896 ULVT1800 / 234 24 ULVT1800 / 126 15

1900 1996 ULVT1900 / 247 25 ULVT1900 / 133 16

FIESSLER

ELEKTRONIK

3.6 Operating modes

The DIP switches in the connector cover enable the following operating modes to be

selected:

- Safety mode with / without restart interlock

- With / without contactor check

- equivalent / antivalent outputs

(Fig. 9/1)

In the condition when delivered, the preset operating mode comprises safety mode with

restart interlock, contactor check and equivalent outputs.

The following operating modes can be set:

Caution!

The operating mode may only be selected when no voltage is present. If the DIP switches are actuated during

operation, the light barrier will switch off the outputs and go to locking status. This is indicated by flashing of the

yellow and orange LEDs. Locking status will only be ended once the power supply has been switched off.

The switchgears ULSG, LSUW NSR 3-1-K and LSUW N1-Muting K are available for additional functions such as potential-free

output contacts or muting (Refer to Section 7 for further information and electric connection).

FIESSLER

E L E K T R O N I K

Typ: ULSG 230V

TÜVRheinland

2311819 14 12 15 13 17 16 21 20

Schaltgerät BWS Typ 4

Switching unit ESPE Type 4

Boîtier de commande ESPS Type 4

Kastellstr.9 73734 Esslingen

Tel. 0711/ 91 96 970

Achtung Vor Abziehen der Klemmleiste Netzspannung abschalten!

Attention

Turn off the supply voltage !

Attention Couper l'alimentation !

Nr./Baujahr No./year of construction No./annéede fabrication .................................

Ansprechzeit response time temps de réponse 20 mS

Temp. temp. temp. -10… + 55 °C

Schutzart enclosure rating degré de protection IP20

Versorgung supply voltage tensiond'alimentation 230 VAC -15% +10 %, 50Hz

Kontaktbel. contact max. chargecontact maxi. 2 A, 250 VAC

Made in Germany

SK230V 115V 24V - +LS -LS A1 A2N

Without contactor check With contactor check The operating mode with contactor check serves to monitor the

driven succeeding contactors.

After each interruption of the light path and before each release of

the switching outputs, it is checked whether the succeeding

contactors have fallen. Only then will a new release be possible. If

the contactors do not respond within 300 ms, the light barrier

switches off the outputs and goes into locking status.

Without restart interlock With restart interlock With the operating mode with restart interlock selected, a button

must be connected to the start button input for a start release of the

operating movement.

When the protective field is free, the yellow LED lights up on the

receiver as a start prompt. Only once the start button has been

pressed will the outputs of the ULVT be switched to active.

Equivalent outputs Antivalent outputs In the equivalent outputs operating mode, both PNP outputs are

failsafe and monitored internally for short-circuits and cross-circuits.

With a free light path, both outputs are high (+24 V). In the antiva-

lent outputs operating mode, output 1 is high (+24 V) and output 2

low (0 V) when the light path is free. Output 2 is not failsafe in this

operating mode. This operating mode is only permissible in

conjunction with the safety switchgears LSUW NSR 3-1K, LSUW

N1-Muting K, or another safe sequential phase control device which

monitors output 2!

3 System description and application areas

Fig. 9/1 The operating modes can be

set using the DIP switches. The

condition when delivered is

shown here.

A1237

45810

917

BC12 13 14 15 16 18 19 20 21 22 D

FIESSLER

E L E K T R O N I K

Schaltgerät BWS Typ 4

Switching unit ESPE Type 4

Boîtier de commande ESPS Type 4

Nr./Baujahr

Ansprechzeit

Temp.

Schutzart

Versorgung

Kontaktbel.

Kastellstr.9 73734 Esslingen

Tel. 0711/ 91 96 97-0

LSUW NSR 3-1 K

No./year of construction

response time

emp.

enclosure rating

supply voltage

contact max

No./année de fabrication

temps de réponse

temp.

degré de protection

tension d'alimentation

charge contact maxi.

.................................

30 mS

-10… + 55 °C

IP 20

230 VAC -15% +10 %, 50Hz

2 A, 250 VAC

Netz tension

power

LS Frei BS libre

LC free

output interupted

sortie interrompue

Ausgang unterbrochen

output free

sortie libre

Ausgang frei

interdiction de redémarrage

restart interlock

Wiederanlaufsperre

LS unterbrochen BSinterrompue

LC interrupted

Made in Germany

TÜVRheinland

Achtung Vor Abziehen der Klemmleiste Netzspannung abschalten!

Attention

Turn off the supply voltage !

Attention Couper l'alimentation !

123456

off

123456

off

123456

off

123456

off

123456

off

123456

off

123456

off

11 142 65341 1715 20 21 22 D79 1210 B CA

Schaltgerät BWS Typ 4

Switching unit ESPE Type 4

Boîtier de commande ESPS Type 4

Nr./Baujahr

Ansprechzeit

Temp.

Schutzart

Versorgung

Kontaktbel.

Kastellstr.9 73734 Esslingen

Tel. 0711/ 91 96 97-0

LSUW

No./year of construction

response time

emp.

enclosure ratin

supply voltage

contact max

No./année de fabrication

temps de réponse

temp.

ré de protection

tension d'alimentation

char

e contact maxi.

Net

ztension

power

Frei

BS libre

LC free

output free

sortie libre

sgang

frei

interdiction de redémarrage

restart interlock

Wiederanla

fsperre

nterbrochen

BS interrompue

LC interrupted

Made in Germany

TÜV

Rheinland

.................................

30 mS

-10… + 55 °C

IP 20

230 VAC -15% +10 %, 50Hz

2 A

250 VAC

LC muted

BS desaktiveéLS gebrückt

Achtun

Vor Abziehen der Klemmleiste Netzspannun

abschalte

ttent

Turn off the suppl

volta

e !

Attention Couperl'alimentation !

Safety switchgear

Additional function

ULSG LSUW NSR 3-1-K LSUW N1 Muting K

Muting (bridging) X

Cycle mode - safety and control mode for

cyclic penetration of the protective field

(with either 1-cycle or 2-cycle mode X

Potential-free output contacts X X X

Selection mode

(connection for mode selection switch) X

Start interlock X X

Safety mode with restart interlock only

during the operating movement X

BA - ULVT

FIESSLER

ELEKTRONIK

4.1 Safe distance from hazardous area

The safe distance (S) between the accident-preventing light barrier and hazardous area must be big enough to ensure that when

the protective field is penetrated, the hazardous area cannot be accessed before the hazardous movement has been

ended. In addition, it must be ensured that reaching over, under or around, or walking behind the protective field is

prevented by additional mechanical screening or further light barriers. To this end, please also refer to EN 999 and

other effective national and international safety regulations.

4.1.1 Vertical light barrier protection of hazardous areas

The safe distance S is calculated as follows:

- K = Grabbing speed or approach speed

For the grabbing speed K, a speed of 2000 mm/s is preset. If the calculation

for S produces a value greater than 500 mm, the calculation can be repeated

with 1600mm/s if this does not lead to a value lower than 500 mm (smin > 100

mm)

- T = t1 + t2 t1 = Response time of the safety device

t2 = Run-on time of the machine

With ULVT light barriers, the response time of the safety

device

t1 depends on the number of beams (refer to Table 10/1).

When using the ULVT with the optional safety

switchgears, the

response time of the switchgears is added to t1:

For LSUW N1 Muting switchgear: 20 ms

For LSUW NSR 3-1K switchgear: 25 ms

For ULSG switchgear: 6 ms

The run-on time of the machine t2 must be specified by the

machine manufacturer.

- C = 8 (d - 14 mm) d = Definition of the safety device

(minimum detectable obstacle size)

The definition capacity d ( = 14 mm or 30mm) is specified on the nameplate of the ULVT light barrier,

for d =14mm => C=0, for d= 30 0> C= 128mm

Calculation examples for the safe distance with vertical area protection using ULVT light barriers

≥

Example 1:

ULVT100/13 safety light barrier

Run-on time t2 of the machine from 75 ms

S = 2000 mm/s x (0.075s + 0.006s)

S = 162 mm

Example 2:

ULVT500/35 safety light barrier

ULSG safety switchgear

Run-on time t2 of the machine from 75 ms

S = 2000 mm/s x (0.075s + 0.007s + 0.006s) +8(30mm-14mm)

S = 304 mm

Table 10/1 Response time t1 of the ULVT light

barriers (standard form factors)

SNachlaufweg

der Maschine

4 Installation - Safe distances

S = (K x T) + C

Fig. 10/1 Vertical protection of hazardous areas

For S = 100 mm to 500 mm:

For S > 500 mm:

S = (2000 mm / s .T)

S = (1600 mm / s .T)

BA - ULVT

Run-on path

of the machine

Protective field

height / no of

smallest

obstacle

14mm

reaction

time

(ms)

14mm

Protective field

height / no of

smallest

obstacle

30mm

reaction

time

(ms)

30mm

ULVT100 /13 6 ULVT100 /7 5

ULVT200 / 26 7 ULVT200 / 14 6

ULVT300 / 39 8 ULVT300 / 21 6

ULVT400 / 52 9 ULVT400 / 28 7

ULVT500 / 65 10 ULVT500 / 35 7

ULVT600 / 78 11 ULVT600 / 42 8

ULVT700 / 91 12 ULVT700 / 47 9

ULVT800 / 104 13 ULVT800 / 56 9

ULVT900 / 117 14 ULVT900 / 63 10

ULVT1000 / 130 15 ULVT1000 / 70 10

ULVT1100 / 143 17 ULVT1100 / 77 11

ULVT1200 / 156 18 ULVT1200 /84 12

ULVT1300 / 169 19 ULVT1300 / 91 12

ULVT1400 / 182 20 ULVT1400 / 98 13

ULVT1500 / 195 21 ULVT1500 / 105 13

ULVT1600 / 208 22 ULVT1600 / 112 14

ULVT1700 / 221 23 ULVT1700 / 119 15

ULVT1800 / 234 24 ULVT1800 / 126 15

ULVT1900 / 247 25 ULVT1900 / 133 16

4.2 Horizontal protection of hazardous areas

FIESSLER

ELEKTRONIK

4 Installation - Safe distances

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Calculation examples for the safe distance with

horizontal protection of hazardous areas using

ULVT light barrier:

Example:

ULVT1200/156 light barrier

Response time t1 of light barrier: 18 ms

Run-on time t2 of machine: 50 ms

H = 200 mm

The safe distance is:

S = (1600 mm / s x (0.050 s + 0.018)) +

(1200 mm - 0.4 x 200 mm)

S = 1229 mm

With the ULVT 1200/156, the protective field

depth is 1200 mm.

A distance abetween protective field and

machine of 53 mm provides a safe distance

S= 1253 mm

Formula for calculating the safe

distance with horizontal protection of

hazardous areas using a light barrier:

Here:

K = 1600 mm/s

C = 1200mm-0.4H, but smaller than 850

mm, whereby H is the height in mm

of the protective field above the

reference level, e.g. floor.

With a height of the protective field above

the floor of > 300 mm, a risk of crawling

under exists. This must be considered in

risk assessment.

The following condition thus applies for H

≥300 mm:

1200 - 0.4 x H > 850 mm

The distance a of the end of the

protective field (last beam to front

edge of hazardous area) must be

no more than:

Example:

Height 200 mm

a = 200 / 15 + 40 mm

a = 53 mm

S = (1600 mm / s x T) + (1200 mm - 0,4 H)

a = H / 15 + 40 mm

S = Safe distance

Start of protective field (first beam) to

front edge of hazardous area

Front edge of hazardous area

H= Height of protective field to reference level

S = (K x T) + C

a = Distance from last beam of protective

field to front edge of hazardous area

BA - ULVT

4.2.1 Installation without additional screening

The light transmitter (a) (Fig. 12/1) and the light receiver (b)

form the light barrier (c). If the light beams are interrupted, e.g. by

a hand, a pilot circuit is opened and the closing action is

prevented / stopped. In the opposite example, it is not possible

to avoid the ULVT light barrier from the working side, which

means that additional screening is not required.

In order to prevent the walking behind the protective field,

the distance between the ULVT safety light barrier and the

machine must be _< 75 mm.

4.2.2 Protection against reaching under and over

In a normal working process (Fig. 12/2a), the operator inserts the

workpiece when sitting down. Due to the run-on time of the machine, the ULVT safety light barrier (a) is mounted slightly in

front of the hazardous area (refer to Section 4.1). However, the light barrier height selected here leaves an unprotected

gap at the top of the light barrier. Fig. 12/2b shows how reaching over the light barrier can lead to an accident. The

proper rectification of this problem is illustrated in Fig. 12/2c, where a ULVT safety light barrier with a larger

protective field height has been attached.

FIESSLER

ELEKTRONIK

4 Installation - Construction requirements

Fig. 12/1 Installation without additional screening

Fig. 12/2a.b.c Protection against reaching under or over.

12/2.a 12/2.b 12/2.c

If the distance between the vertical ULVT safety

light barrier and the machine needs to be

greater than 75 mm (e.g. in order to maintain

the safe distance to the hazardous area), the

possibility of walking behind the protective field must be

eliminated through an additional ULVT safety light barrier

and/or cascading of two light barriers (Fig. 12/3 and 12/4) or a

protective bar.

Fig. 12/3 Protection against walking behind through cascading of two light

barriers

In cascading, varying form factors can becombined (e.g. main

sensor with 1100 mm protective field height and succeeding

sensor with 200 mm protective field).

When combining main and succeeding sensors, the max. beam

number of 247 must be ob-

served

The main and succeeding

sensors are supplied with

premanufactured

connecting

cable.

AAA

interdictionde

redŽmarrage

ULVT

Empfänger

7654321

1.24V±20%

2.0V

3.PE

4.A1

5.A2

6.Schützhilfsöffner

7.Start-Taster

ULVTReceiver/Récepteur

Wiederanlauf

Justierhilfe

LSfrei

restartinterlock

adjustment

LCinterrupt

LCfree

Aided«ˆjustement

libre

interrompu

BWSTyp4, ESPEType4 , ESPS Type4

FIESSLER

EL E K T R O N I K

unterbrochen

sperre

AAAAAAAAAAAAAAAA

Fig. 1274 Cascading of two safety light

barriers

BA - ULVT

Wrong! Right!

4.2.3 Protection against walking behind through cascading or additional screening

Wrong! Right!

4.2.4 Distance from reflective surfaces

To prevent the avoidance and non-

detection of an obstacle due to

reflecting objects, the

ULVT safety light barrier

must be assembled with

a minimum distance a

(Fig. 13/1) from the

reflective object.

The minimum distance acan be

established from the table:

4.2.5 Arrangement of two ULVT... safety light barriers

To eliminate the mutual clashing of

two ULVT... safety light barriers, the

following must be observed when

arranging two light barriers:

FIESSLER

ELEKTRONIK

Installation range in m Up to 3 4567

Distance a in mm 130 175 219 262 306

Empfänger

SenderEmpfänger

AAAAAAAA

AAAAAA

AAAAAAAA

SenderEmpfänger

Sender Empfänger

SenderEmpfänger Sender

Empfänger Sender

4 Installation - Construction requirements

Fig. 13/1 Distance from reflective surfaces

Fig. 13/2 Arrangement of 2 light barriers

AAAAAAAAAAAAAAAAAAAAA

AAAAAAAAAAAAAAAAAAA

AAAAAAAAAAAAAAAAAAAAA

max. 5o

AAAAA

amax. 5o

Hazardous area

Reflective object

(e.g. container)

ULVT receiver ULVT transmitter

Approach direction

Interrupted beam Central beam

Container

BA - ULVT

Receiver Transmitter

Transmitter Receiver

Receiver Transmitter

4.3 Installation of transmitter and receiver

When installing the transmitter and receiver, it must be ensured that connectors of both devices are located on the same side.

The receiver and transmitter must be installed with parallel faces.

Attachment and adjustment The supplied fastening brackets serve the attachment and adjustment of the light

barrier. Together with the shifting tenon blocks, the latches enable a universal

attachment.

The swivel the longitudinal axis, turn the respective adjusting screw on one of the

fastening brackets whilst both screws on the other fastening bracket are loose. To swivel

the lateral axis, turn both screws of a fastening bracket at the same time whilst both

screws on the other fastening bracket are loose.

Rubber-metal connection

In the event of intense vibrations, please use rubber-metal connections which can be obtained as optional accessories.

Wall mounting example

FIESSLER

ELEKTRONIK

djusting screws with counter nuts for swivelling along longitudinal and lateral axes.

Further adjustment information is provided in Section 6, "Commissioning".

Bore dia.: 7 mm for attachment of

light barrier

4 Installation - Installation of transmitter and receiver

M6 x 15 DIN 912

50 x20 x 2

40 X 90 x 6

50 x20 x 2

M8 DIN 912

M8 DIN 127

M6 DIN 934

M6 DIN 127

Longitudinal

axis

Lateral axis

Fig. 14/1 Installation with parallel faces

Fig. 14/2 Swivelling along longitudinal and

lateral axis

Depends on run-

on time of machine

Machine

Important: In order to ensure error-free operation, both the light transmitter and light receiver

must attached to stable, distortion-free and face-parallel constructions. Install the

fastening brackets so that the adjusting screws remain easily accessible.

Make sure that the shape is not distorted. Otherwise a perfect visual adjustment will

not be possible. Adjust one fastening bracket whilst the adjusting screws on the other

fastening bracket are loose.

BA - ULVT 14

4.4 Multi-sided screening through tilted mirrors

Using tilted mirrors, the protective field can be "wrapped around" a hazardous area, thus providing protection from several

sides (Fig. 15/1 and Fig. 15/2). Here, the law of reflection applies, whereby the angle of incidence is the same as the angle of

reflection. This means for that tilting of 90°requires the mirror to be installed at an angle of 45°. For this purpose, the tilted

mirrors for ULVT feature swivelling attachments.

Reflection loss: Each reflection via a mirror weakens the transmitted signal. For this reason, the max. range and number of

mirror reflections must be observed when using mirrors. The transmitter, receiver and mirrors must always be assembled

vertically and checked using a spirit level.

Operational reliability can only be ensured when the mirrors are assembled in a stable manner.

Refer to Section 6 for precise adjusting information.

4.5 Assembly columns

For installation in an open area (e.g. for the multi-sided protection of hazardous areas), the ULVT light barriers and titled

mirrors can supplied as premanufactured assembly columns.

FIESSLER

ELEKTRONIK

4 Installation - Operation via tilted mirrors

Column for ULVT and mirrors

Elongated assembly slot for M12

Top cover (mirror)

Front and top lid

(transmitter, receiver)

4 adjusting screws for assembly column

BA - ULVT

Base plate as drilling template for M12 base attachment and for

supporting the adjusting screws

Fig. 15/1 Arrangement of 2 tilted mirrors Fig. 15/2 Arrangement of 1 tilted mirror

Mirror Mirror Receiver

Receiver

Mirror

Transmitter Transmitter

Hazardous area Hazardous area

Fig. 15/3 Assembly columns for light barrier and mirrors

Installation of the columns

1. Provide electric connection of transmitter and

receiver

2. Optically align the transmitter, receiver and mirrors

3. Check for correct function

4. Drill the holes and attach the columns

The transmitter, receiver and mirror columns are

attached horizontally at the same height. A precise spirit

level must be used to check this. With vertical

arrangement, the 4 adjusting screws are used on the

respective posts. The columns can be rotated using the

elongated assembly slots. In addition, the mirror can be

rotated by loosening the M8 hexagon nut on the

connecting rod located below the top cover. The

supplied black base plate assists the fitter in drilling the

M12 holes in the floor for the columns. It must be

ensured that the columns are aligned as shown in the

opposite drawing.

Fine tuning is carried out as described in Section 6,

"Commissioning". The front and top covers must be

removed for this purpose. The front cover must be

reattached once assembly and adjustment has been

completed.

FIESSLER

ELEKTRONIK

AAAAAAAAAAAAAAAAAAAAAA

AAA

AAAA

AAAAA

AAAAAA

AAAAAAA

AAAAA

AAAAAAAAAA

AAAAAAAAA

AAAAAAAAAAAAAAAAAAAAAA

AAAAAAA

AAAAA

AAAAAAAAAA

AAA

AAAA

AAAAA

AAAAAAAAA

90o

4 Installation - Assembly columns

Fig. 16/3 Installation of the columns

140

1250

AAAAAAA

AAAA

110

AAAA

200

140

1250

AAAAAAA

AAAAA

AAA

AAAAA

110

200

AAAA

DIN 970-M8

Fig. 16/1 Assembly column with ULVT light barrier Fig. 16/2 Assembly column with mirrors

BA - ULVT

5.1 Integrated connector plug

The ULVT construction series is supplied with

PG threaded joints as standard. Various

conventional connector plugs can also be

obtained as optional accessories.

The electric connection is implemented via

terminal screws in the connector cover (Fig.

17/1). The cover can be removed once the 4

screws have been loosened.

The transmitter and receiver require a power supply of 24 V DC. The ULSG switchgear performs the power failure bridging of

20 ms pursuant to EN 60204 and is thus suitable as the power supply for ULVT light barriers. The receiver is equipped with 2

inputs and 2 outputs. The transmitter is connected via one 3-pin cable and the receiver via one 5 to 7-pin cable (depending on

operating mode). The permissible cable cross-section is max. 1.5 mm2. The cables must be routed separately from power

lines.

5.2 Electric connection ratings

5.3 Connectors

- Outputs 1 and 2 (OSSD 1 and OSSD 2)

The outputs are not potential-free and must not be switched in series

or parallel, but must be connected and processed separately!

In the operating mode with

equivalent outputs

, both PNP outputs are

failsafe and feature internal short-circuit and cross-circuit monitoring. Both

outputs are high (+24 V) when the light path is free.

In the operating mode with

antivalent outputs

, output 1 is high (+24 V)

and output 2 low (0 V) when the light path is free. Output 2 is not failsafe

in this operating mode. This operating mode is only permissible in

conjunction with the safety switchgears LSUW NSR 3-1K, LSUW N1-

Muting K, or another safe sequential phase control device which

monitors output 2!

- Input contactor check (EDM)

If the operating mode with

contactor check

is set, the auxiliary contacts

k1 and k2 of the driven contactors k1 and k2 must be connected to the

contactor check input in series and with +24 V as shown in Fig. 17/2.

The OSSD1 and OSSD 2 of the ULVT will only switch on the two

contactors when contactor check input has detected the idle status of the

contactors (+24 V at contactor check input).

Once the contactors have been driven, both of them must respond within

300 ms. The two auxiliary contacts must then be open (0 V at contactor

check input).

If the operating mode

without

contactor check

is set, the input

contactor check must be unoccupied.

FIESSLER

ELEKTRONIK

5 Electric connection - Connection of receiver and transmitter

The electric connection must only

be carried out when no voltage is

present.

ULVTS transmitter ULVTE receiver

Power supply 24 V DC, + 20% - 10%, SELV 24 V DC, ±20%, SELV

Current draw max. 250 mA max. 250 mA (without load)

Outputs -

OSSD 1 and 2

: Failsafe PNP outputs,

max. 0.5 A, short-circuit and cross-circuit monitoring (in

operating mode with

antivalent outputs

, output 2 is a non

failsafe PNP output, max 20 mA)

Inputs -Inputs contactor check and start button:

0 V to 24 V DC _+ 20%, 10 mA

Electric connection Integrated connector plug with PG9 as strain relief,

alternatively conventional connector plug. Integrated connector plug with PG9 as strain relief,

alternatively conventional connector plug.

Connecting cable 3-pin max. 1.5 mm2 5 to 7-pin (depending on operating mode) max. 1.5 mm2

Protection category IP 65 IP 65

AAAAA

OSSD 2

OSSD 1

7+24V DC±20%

6K 1 K 2

Fig. 17/2 Outputs 1 and 2

AAAAAA

+24V DC±20%

Eingang Schützkontrolle

Hilfsöffner k1

Hilfsöffner k2

Fig. 17/3 Input contactor check

123 4 56 7

3: OSSD1 5:

2: EDM 7: 24VDC

±20%

4: OSSD2

1: Start

123456

off

1234567 123

6: 0V

Fig. 17/1 Integrated connector plug with terminal screws in

connector cover

Receiver 7-pin, transmitter 3-pin.

BA - ULVT

auxiliary contact 1

auxiliary contact 2

input contactor check

- Input start button

If the operating mode with

restart interlock

is set, a button must be

connected on the start button input for the start release of the operating

movement (Fig. 18/1).

With a free protective field, the yellow LED on the receiver lights up as a

start prompt. Only once the start button has been pressed will the two

outputs OSSD1 and 2 of the ULVTE receiver be switched to active.

If the operating mode

without restart interlock

is set, the start button

input (start) must be unoccupied).

5.4 Connection examples

5.4.1 Operating mode with restart interlock / contactor check

5.4.2 Operating mode without restart interlock / contactor check

5.4.3 PLC drive

When connecting to a safe stored program control (PLC) the outputs of the ULVT must be connected to

seperate inputs of the PLC

FIESSLER

ELEKTRONIK

5 Electric connection - Connection of receiver and transmitter

Caution! Error-free operation can only be ensured when the safety light barrier is connected according to one of the following

connection diagrams (and/or as shown in Section 7), and also complies with effective national and international

accident prevention regulations!

Any deviation from these connection specifications can lead to hazardous conditions and is therefore not permitted.

7654321

+24V DC±20%

OSSD 2

OSSD 1

Schützkontrolle

Start-Taster

K1 k1 k2

1234567

Erde

123

+24V DC+20%-10%

Erde

7654321

123

+24V DC±20%

OSSD 2

OSSD 1 K2

+24V DC+20%-10%

1234567

Erde

unbelegt

7654321

123

+24V DC±20%

OSSD 2 E1

OSSD 1 E2

+24V DC+20%-10%

1234567

Erde

unbelegt

Sicherheits-

SPS

AAAAAA

+24V DC±20%

Start-Taster

Eingang Start-Taster

Fig. 18/1 Start button input

Receiver

Transmitter

Receiver

Transmitter

Receiver

Transmitter

Note:

The functional ground

(marked GND in the

opposite connection

examples) must be

connected at the

transmitter and

receiver in order to

ensure EMC

resistance.

BA - ULVT

Contactor check

Start button

GND

Start button

Input start button

GND

Unoccupied

Safety

PLC

6.1 Commissioning

Prior to commissioning, the appropriate operating mode for the respective application case must be set via the DIP switches in

the terminal strip compartment (refer to Section 3.5). When delivered, the operating mode with restart interlock, contactor

check and equivalent outputs is set (refer to Section 5).

6.1 Adjustment information

The visual alignment is advantageously carried out with intensely dimmed ambient lighting in order to be able to better detect

the LED indications of the receiver even from a long range.

When aligning, it must be ensured that the housing shapes do not become distorted.

An adjustment laser can be obtained for the precise alignment of the ULVT light barriers,

particularly where large distances are involved. The device is attached to the front panel of

the transmitter and receiver. When the button is pressed, the laser lights up red light spot

which can also be seen from long distances. The light spot must hit the centre of the

opposite device. This test should be performed at both ends of the transmitter and receiver.

The arrangement must be adjusted if necessary.

Adjustment with operation via tilted mirrors: Place the adjustment laser onto the front

panel of the transmitter, switch it on and swivel the transmitter until the light spot hits the

centre of the mirror. Then adjust the mirror so that the light spot also hits the centre of the second mirror / receiver.

Adjustment LED: The orange LED extinguishes when sufficient light reserve is present.

Fine tuning

Subsequent to face-parallel installation and/or alignment using the adjustment laser, fine

tuning is carried out by means of the adjusting screws on the supplied fastening brackets,

provided that the orange LED is lit.

The swivel along the longitudinal axis, the respective adjusting screw on one of the fastening

brackets is turned whilst both screws on the other fastening bracket are loose. To swivel the

lateral axis, both screws of a fastening bracket are turned at the same time whilst both

screws on the other fastening bracket are loose.

Subsequently, the green or yellow LED on the receiver should light up, and the orange

LED must have extinguished.

Test rod: Using the test rod, the light barrier is to be interrupted on the transmitting side from start to finish in such a way that the

light field is only covered by this part. The green LED must not light up from start to finish. The diameter of the test rod must

correspond to the obstacle size specified on the nameplate of the receiving side.

FIESSLER

ELEKTRONIK

Light barrier free

and correctly

adjusted

Outputs active Outputs not active,

(Prompt for start release with start button)

Light barrier free,

but insufficient

reserve

Outputs active

To swivel along longitudinal or

lateral axis until orange LED

extinguishes

Outp

Outputs not active,

(Prompt for start release with start button)

To swivel along longitudinal or lateral axis

until orange LED extinguishes

6 Commissioning

Longitudina

l axis

Lateral axis

interdiction de

redŽmarrage

Wiederanlauf

Justierhilfe

LS frei

restart interlock

adjustment

LC interrupt

LC free

Aide d«ˆjustement

libre

interrompu

unterbrochen

sperre interdiction de

redŽmarrage

Wiederanlauf

Justierhilfe

LS frei

restart interlock

adjustment

LC interrupt

LC free

Aide d«ˆjustement

libre

interrompu

unterbrochen

sperre

interdiction de

redŽmarrage

Wiederanlauf

Justierhilfe

LS frei

restart interlock

adjustment

LC interrupt

LC free

Aide d«ˆjustement

libre

interrompu

unterbrochen

sperre interdiction de

redŽmarrage

Wiederanlauf

Justierhilfe

LS frei

restart interlock

adjustment

LC interrupt

LC free

Aide d«ajustement

libre

interrompu

unterbrochen

sperre

Operating mode Without restart interlock With restart interlock

BA - ULVT

6.3 Troubleshooting

The prerequisite for the troubleshooting process is a correctly adjusted light barrier (refer to Section 6.2)

Please observe: Solvents can damage the plexiglass panels of the transmitter and receiver. As an alternative, light barriers

with silicate glass can be delivered. Welding spots can burn into the silicate glass panels. This is prevented by a

replaceable protective panel made out of PVC.

Maintenance information: The ULVT... system is maintenance-free depending on the construction. The protective panels in

front of the transmitter and receiver should simply be cleaned at regular intervals with a solvent-free detergent. This does not,

however, release the obligation to carry out the prescribed annual inspection pursuant to EN 61496, ZH 1/281 and/or ZH

1/597.

FIESSLER

ELEKTRONIK

Operating / fault status Possible causes Remedy

Yellow LED off No power supply Check power supply

Yellow LED flashing Internal error, transmitter inactive Switch off power supply and then

switch on again. If yellow LED still

flashes: Transmitter defective, replace

transmitter

6 Commissioning - Troubleshooting

Transmitter

Operating / fault status Possible causes Remedy

No LED illuminated No power supply Check power supply

Green LED off

Red LED on

Orange LED on

Yellow LED off

a) Transmitter inactive

b) Light path interrupted

c) Light barrier maladjusted or very dirt

d) Max. range exceeded

a) Check transmitter

b) Remove obstacle from light path

c) Readjust and/or clean system

d) Check range

Green LED off

Red LED on

Orange LED off

Yellow LED on

(no fault)

Operating mode with restart interlock

active, prompt for start release

Press start button

Green LED off

Red LED off

Orange LED on

Yellow LED off

a) Insufficient reserve, light barrier

maladjusted or slightly dirty

b) Max. range exceeded a) Readjust

and/or clean system

a) Readjust and/or clean system

b) Check range

Green LED and/or

Orange LED flashing a) In operating mode with contactor

check: Contactors not responding or fal-

len

b) Operating mode setting does not

match the electric wiring and/or DIP

switches are not set as specified in

Sect. 3.5.

c) Internal error

a) Check auxiliary contact k1 and k2

and/or wiring

b) Check operating mode setting

c) Switch off power supply and then

switch on again

If LED still flashes: Check operating

mode setting; if correct mode set -

receiver defective, replace receiver.

Receiver

interdiction de

redŽmarrage

Wiederanlauf

Justierhilfe

LS frei

restart interlock

adjustment

LC interrupt

LC free

Aide d«ˆjustement

libre

interrompu

unterbrochen

sperre

Sender ein Transmitter on

Emetteur en

marche

interdiction de

redŽmarrage

Wiederanlauf

Justierhilfe

LS frei

restart interlock

adjustment

LC interrupt

LC free

Aide d«ˆjustement

libre

interrompu

unterbrochen

sperre

interdiction de

redŽmarrage

Wiederanlauf

Justierhilfe

LS frei

restart interlock

adjustment

LC interrupt

LC free

Aide d«ˆjustement

libre

interrompu

unterbrochen

sperre

interdiction de

redŽmarrage

Wiederanlauf

Justierhilfe

LS frei

restart interlock

adjustment

LC interrupt

LC free

Aide d«ˆjustement

libre

interrompu

unterbrochen

sperre

Sender ein Transmitter on

Emetteur en

marche

BA - ULVT

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