Fiessler ESPE Type 4 Operating Instructions 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: [e-mail]

Infrared accident prevention safety curtains, ESPE Type 4

ULVT

Operating Instructions

CONTENTS:
Safety Instructions
Application Notes
Installation
Electric Connection
Commissioning
Specificatio

ns

FIESSLER

E L E K T R O N I K

Optional

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

2

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

3

FIESSLER

ELEKTRONIK

Table of Contents

BA - ULVT

4

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.

5

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.

6

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).

7

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

BA - ULVT

FIESSLER

ELEKTRONIK

8

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 Light bar.interrupted

Orange ON

Contamination
(no reserve)

Yellow ON Start prompt
Orange flashing Fault
Yellow flashing Fault

Sender ein

Transmitter on

123

ULVT Send

er

TÜV Rheinland

AA

AA

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

5:

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

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

5:

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

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)

SH

Construc-

tion length

(mm)

BL

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

9

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

TÜV Rheinland

AA

AA

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. [phone]

Achtung Vor Abziehen der Klemmleiste Netzspannung abschalten!

Attention

Turn off the supply voltage !

Attention Couper l'alimentation !

Nr./Baujahr No./year of construction No./année de fabrication .................................

Ansprechzeit response time temps de réponse 20 mS
Temp. temp. temp. -10… + 55 °C
Schutzart enclosure rating degré de protection IP 20
Versorgung supply voltage tension d'alimentation 230 VAC -15% +10 %, 50Hz
Kontaktbel. contact max. charge contact 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 antiva­lent 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.

6

A

1

2

3

7

4

5

8

10

9

17

B

C

12

13

14

15

16

18

19

20

21

22

D

11

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. [phone]

LSUW NSR 3-1 K

No./year of construction
response time

t

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

BS interrompue

LC interrupted

Made in Germany

TÜV Rheinland

AA

AA

TÜV Rheinland

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. [phone]

LSUW N1 Muti

ng

No./year of construction
response time

t

emp.
enclosure rating
supply voltage
contact max

No./année de fabrication
temps de réponse
temp.
degré de protection
tension d'alimentation
charge contact maxi.

Net

z tension

power

LS Frei

BS libre

LC free

output free

sortie libre

Ausgang frei

interdiction de redémarrage

restart interlock

Wiederanlaufsperre

LS unterbrochen

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

Achtung Vor Abziehen der Klemmleiste Netzspannun

g

abschalte

n

A

ttention

Turn off the supply voltage !

Attention Couper l'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

10

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)

S

Nachlaufweg
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

11

4 Installation - Safe distances

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 a between 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

H

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

S

a

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

12

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 ob­served

The main and succeeding
sensors are supplied with
premanufactured
connecting
cable.

interdiction de

redŽmarrage

ULVT

Empfänger

7654321

1. 24V±20%

2. 0V

3. PE

4. A1

5. A2

6. Schützhilfsöffner

7. Start-Taster

ULVT Receiver/Récepteur

Wiederanlauf

Justierhilfe

LS

LS frei

restart interlock

adjustment

LC interrupt

LC free

Aide d«ˆjustement

libre

interrompu

BWS Typ4, ESPE Type4 , ESPS Type4

FIESSLER

E L E K T R O N I K

unterbrochen

sperre

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 non­detection 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 a can 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

13

Installation range in m Up to 3 4567
Distance a in mm 130 175 219 262 306

Empfänger

SenderEmpfänger

AAAAAA

A

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

AAAAAAAAAAAAAAAAAAA

A

max. 5

o

a

max. 5

o

Hazardous area

Reflective object
(e.g. container)

ULVT receiver

ULVT transmitter

Approach direction

Interrupted beam

Central beam

Container

BA - ULVT

Receiver Transmitter

Receiver Transmitter

Receiver Transmitter

Transmitter Receiver

Receiver Transmitter

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

A

A

A

A

A

A

A

40 X 90 x 6

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 run­on 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

15

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

16

A

A

A

AA

90o

4 Installation - Assembly columns

Fig. 16/3 Installation of the columns

140

1250

10

AA

A

AA

A

AA

A

AA

A

AA

A

AA

A

AA

A

AA

A

AA

A

AA

A

AA

A

AA

A

AA

A

AA

A

AA

A

AA

A

AA

A

AA

A

AA

A

AA

A

AA

A

AA

A

AA

A

AA

A

AA

A

AA

A

AA

A

110

R7

M8

27

30

200

200

140

1250

10

AAA

A

AAA

A

AAA

A

AAA

A

AAA

A

AAA

A

AAA

A

AAA

A

AAA

A

AAA

A

AAA

A

AAA

A

AAA

A

AAA

A

AAA

A

AAA

A

AAA

A

AAA

A

AAA

A

AAA

A

AAA

A

AAA

A

AAA

A

AAA

A

AAA

A

AAA

A

AAA

A

110

200

DIN 970-M8

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 N1­Muting 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

17

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

OSSD 2

OSSD 1

3

4

7

+24V DC±20%

0V

6

K 1 K 2

Fig. 17/2 Outputs 1 and 2

0V

7

2

+24V DC±20%

Eingang Schützkontrolle

6

Hilfsöffner k1

Hilfsöffner k2

Fig. 17/3 Input contactor check

1234 567

3: OSSD1

5:

2: EDM

7: 24VDC
±20%

4: OSSD2

1: Start

123456

off

1234567

1

2

3

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

18

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%

0V

OSSD 2
OSSD 1
Schützkontrolle

Start-Taster

K2
K1

k1

k2

1234567

Erde

123

+24V DC+20%-10%

0V

Erde

7654321

123

+24V DC±20%

0V

OSSD 2

OSSD 1

K2
K1

+24V DC+20%-10%

0V

1234567

Erde

Erde

unbelegt
unbelegt

7

6

5

4

3

2

1

1

2

3

+24V DC±20%

0V

OSSD 2 E1
OSSD 1 E2

+24V DC+20%-10%

0V

12

3

4

5

6

7

Erde

Erde

unbelegt
unbelegt

Sicherheits-

SPS

0V

7

1

+24V DC±20%

Start-Taster

6

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

GND

Start button

Input start button

GND

GND

GND

GND

Unoccupied
Unoccupied

Unoccupied
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

19

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

LS frei

restart interlock

adjustment

LC interrupt

LC free

Aide d«ˆjustement

libre

interrompu

unterbrochen

sperre

interdiction de
redŽmarrage

Wiederanlauf

Justierhilfe

LS

LS frei

restart interlock

adjustment

LC interrupt

LC free

Aide d«ˆjustement

libre

interrompu

unterbrochen

sperre

interdiction de
redŽmarrage

Wiederanlauf

Justierhilfe

LS

LS frei

restart interlock

adjustment

LC interrupt

LC free

Aide d«ˆjustement

libre

interrompu

unterbrochen

sperre

interdiction de
redŽmarrage

Wiederanlauf

Justierhilfe

LS

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

20

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 fal­len
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

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

LS frei

restart interlock

adjustment

LC interrupt

LC free

Aide d«ˆjustement

libre

interrompu

unterbrochen

sperre

interdiction de
redŽmarrage

Wiederanlauf

Justierhilfe

LS

LS frei

restart interlock

adjustment

LC interrupt

LC free

Aide d«ˆjustement

libre

interrompu

unterbrochen

sperre

interdiction de
redŽmarrage

Wiederanlauf

Justierhilfe

LS

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

7.1 Muting

(Bridging unit) for the short-term bridging of a safety light barrier during a material
movement into and out of a manufacturing cell and/or for the safe differentiation
between a human operator and fork-lift truck (Fig. 21/1).

Application: The NSUW N1 Muting switchgear is used if a safety light barrier needs
to be bridged or differentiate between man and material flow for a certain period of
time during an operating cycle, e.g. for protection against bending machines,
palletizing machines, narrow-passage high-bay storage, certain types of presses.

Functional description: In combination with a vertical ULVT safety light barrier and
four muting sensors, the LSUW N1 Muting switchgear enables a differentiation
between man and material flow to be made.

Fig. 21/1 Muting application example
For the muting functions, the following components are required and can be obtained

from us:

1. LSUW N1 Muting K switchgear

2. Safety light barrier, e.g. ULVT 900

3. Four muting sensors, e.g. light barriers, inductive sensors, camshaft controller.

4. Muting lamp (max. 230 V, 60 W, min. 24 V AC or DC max. 0.5 A, min. 50 mA)
In order to prevent the safety light barrier from being constantly bridges through intentional manipulation, a twin-channel time-

out is provided which withdraws the muting function after a configurable time between 3 and 90 seconds. This time is set by
Fiessler Elektronik in accordance with customer specifications. A switching option is also available, whereby operation without
time-out is possible.

The muting lamp, which indicates the bridging status, is monitored. If the muting lamp is connected or is defective,
bridging will not be possible.

Both muting sensor channels must be connected via separate cables in order to rule out a short-circuit. If the muting
sensors require a power supply, the power supplies of the two muting channels must also routed via separate
cables. The connection to the intended + supply terminals and - terminal strip must be implemented separately.

For application which do not permit the interruption of a hazardous movement, which only the sounding of an alarm,
a key switch must be used as the start button. It must only be possible to remove the key in open status.

The alarm is activated when the mains voltage is applied to this system. The alarm can be deactivated by pressing
the key start button.

Before pressing the key start button, it must be checked whether any person is located within the
hazardous area. The key start button must be installed at a point where the protected area can be seen.

To ensure the error-free function of the bridging, the distance S (Fig. 21/2) must the same or smaller than the
length of the pallet, the fork-lift truck or the reflector band on the conveyor vehicle.

However, the distance S must also be large enough to prevent the simultaneous interruption of the muting
sensors LS 2A and LS 1B / LS 2B by a human operator.

If necessary, the distance H to the accessible area, or distance S, must be enlarged.

FIESSLER

ELEKTRONIK

21

7 Additional functions with safety switchgears - Muting

Fig. 21/1 Muting application example

LSUW N1 Muting K switchgear

LS 1A / LS 2A

LS 1B / LS 2B

LSUW N1

Palette

S

LS 1A / LS 2A

LS 1B / LS 2B

ULVT

S

LSUW

LS 1A / LS 2A LS 1B / LS 2B

S

H

Fig 21/2 Distance S must be smaller than the
length of the pallet, the fork-lift truck or the
reflector band

Fig. 21/3 and Fig 21/4 Distance S must be large enough to prevent the simultaneous interruption of the
muting sensors

BA - ULVT

ULVT

We will be happy to provide you with individual advice for planning your
application with muting function. The applications shown here are examples only.

7.1.1 Muting function with four muting sensors and time-out

e.g. high-bay protection, pallet conveyor systems

Connection diagram for muting function with four muting sensors and time-out

FIESSLER

ELEKTRONIK

22

Function: During bridging, the ULVT safety light barrier can be
interrupted without the alarm being activated and/or the entire
system being switched off.

Bridging continues for as long as either the contacts of the two
muting sensors LS 1A and LS 2A or LS 1B and LS 2B, or all
four, are open, but for no longer than the set time.

If the ULVT safety light barrier is interrupted and not bridged at
the same time by the muting sensors, the alarm is activated via
contact B-11 (potential-free break contact) and the system
switched off via the output contacts 20-21 and 16-17. This
enables differentiation between man and material flow.

A restart and deactivation of the alarm is possible by pressing
the start button when the ULVT safety light barrier is free.

Before pressing the key start button, it must be
ensured that no person is located within the
hazardous area.
For safety reasons, the minus and plus lines
must be routed as shown in the connection
diagram. The cabling for muting channels 1 (LS
1A/B) and 2 (LS 2A/B) must be implemented
separately.

228

123

1234567

k1
k2

XXXXX

X

M 2,0 A

12

19

8

22C

8

126

6

127

6

12

14

k1
k2

K2

15

13

M 2,0 A

4

3

6

-

7
+

2

3
+

2

1

5

1

-

++ ++

-- --

K1

M 2,0 A

M 2,0 A

16

13

7

A

D

14

2

5

4

E

3

18

9

15

F

10

11

B

17

21

20

6

8

19

12

C

12

22

1

FIESSLER

E L E K T R O N I K

Nr./Baujahr
Ansprechzeit
Temp.
Schutzart
Versorgung
Kontaktbel.

Kastellstr.9 73734 Esslingen
Tel. [phone]

LSUW N1 Muting K

No./year of construction
response time

t

emp.
enclosure rating
supply voltage
contact max.

No./année de fabrication
temps de réponse
temp.
degré de protection
tension d'alimentation
charge contact maxi.

Netz

tension

power

LS Frei

BS libre

LC free

output free

sortie libre

Ausgang frei

interdiction de redémarrage

restart interlock

Wiederanlaufsperre

LS unterbrochen

BS interrompue

LC interrupted

Made in Germany

TÜV Rheinland

AA

AA

TÜV Rheinland

LS gebrückt

Achtung Vor Abziehen der Klemmleiste Netzspannung abschalten!

Attention

Turn off the supply voltage !

Attention Couper l'alimentation !

L1

230VAC

N

L1

115VAC

LC muted

BS desactiveé

24VDC

Schaltgerät BWS Typ 4

Switching unit ESPE Type 4

Boîtier de commande ESPS Type 4

0 V DC

OSSD2

OSSD1

EDM

Start

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

25 mS

-10… + 55 °C
IP 20
230 VAC -15% +10 %, 50Hz
2 A, 250 VAC

AAAAAAA

A

AAAAAAA

A

AAAAAAA

A

AAAAAAA

A

A

AAAAAA

A

A

AAAAAA

A

A

AAAAAA

A

A

AAAAAA

A

AAAAAAAA

LS 1 A LS 2A LS 1B LS 2B

LSUW

Transportband

LSUW

Transportband

Alarm

LS 1 A LS 2A LS 1B LS 2B

7 Additional functions with safety switchgears - Muting

LSUW N1 Muting K switchgear

ULVT

BA - ULVT

ULVTS Transmitter

ULVTE Receiver

Set operating mode:

Without contactor check

Without restart interlock

(both functions are

performed by switchgear)

antivalent outputs

Muting-Sensor

LS 1B

in muting status

contacts open

Muting sensor

LS 2B

in muting status

contacts open

Muting-Sensor

LS 2A

in muting status

contacts open

Voltage depending on type of
contactor, muting lamp and
alarm signal generator

L1 = 230 V AC

or 24 V DC

Contactor
monitoring

Start button

X = For
interruption
of
hazardous
movement

Muting

lamp

Alarm

Spark arresting

sections

N or 0V

24V DC

0V

Muting-Sensor

LS 1A

in muting status

contacts open

Cable routing: Separately
from power lines. The cable
routing for the contactor
check (terminals D & 22)
must prevent short-circuiting
of wires.

If the sum of the currents to
terminals B, 10, 17 & 21
exceeds 2A, separate fuse
protection of M 2.0 A must
be provided for the contacts.

The hazardous movement
must only be activated via

output contacts 16-17 and
20-21.

The output contacts are
potential-free, monitored,
guided make contacts are
must be loaded with max. 2
A/250 VAC or 60 VDC, 30
W.

With inductive load, the load
(not the contacts) is to be
switched at the same time
as the spark arresting
sections (e.g. 0.22 uF,
220 Ω.

The contact B-11 serves as
an alarm path and is not
permitted to activate the
hazardous closing
movement.

When performing electric
welding work on the
machine, the terminal strip
of the switchgear is to be
removed, otherwise the
vagrant welding currents
may cause destruction of
the installed electronics.

Optional power supply:
Terminal 1 & 2: 230 VAC -15% + 10%

or

Terminal 1 & 3: 115 VAC -15% + 10%

or

Terminal A & 12: 24 VDC -10% + 20%

L1NL1

For supply
with 230 / 115
VAC:
Bridge F- 14

For supply
with 24VDC
Bridge F- A

We will be happy to provide you with individual advice for planning your application
with muting function. The applications shown here are examples only.

Conveyor belt

Conveyor belt

7.1.2 Muting function with four muting sensors without time-out

e.g. high-bay protection, when the loading vehicle can be parked in the entrance area

Connection diagram for muting function with four muting sensors without time-out

FIESSLER

ELEKTRONIK

23

Function: During bridging, the ULVT safety light barrier can be
interrupted without the alarm being activated and/or the entire
system being switched off.

Bridging continues for as long as either the contacts of the two
muting sensors LS 1A and LS 2A or LS 1B and LS 2B, or all
four, are closed.

If the ULVT safety light barrier is interrupted and not bridged at
the same time by the muting sensors, the alarm is activated via
contact B-11 (potential-free break contact) and the system
switched off via the output contacts 20-21 and 16-17. This
enables differentiation between man and material flow.

A restart and deactivation of the alarm is possible by pressing
the start button when the ULVT safety light barrier is free.

Before pressing the key start button, it must be
ensured that no person is located within the
hazardous area.
For safety reasons, the minus and plus lines
must be routed as shown in the connection
diagram. The cabling for muting channels 1 (LS
1A/B) and 2 (LS 2A/B) must be implemented
separately.

228

8

225

8

126

6

124

6

++ ++

-- --

6 4

8

5

k1
k2

XXXXX

X

M 2,0 A

k1
k2

K2

M 2,0 A

K1

M 2,0 A

M 2,0 A

16

13

7

A

D

14

2

5

4

E

3

18

9

15

F

10

11

B

17

21

20

6

8

19

12

C

12

22

1

FIESSLER

E L E K T R O N I K

Nr./Baujahr
Ansprechzeit
Temp.
Schutzart
Versorgung
Kontaktbel.

Kastellstr.9 73734 Esslingen
Tel. [phone]

LSUW N1 Muting K

No./year of construction
response time

t

emp.
enclosure rating
supply voltage
contact max.

No./année de fabrication
temps de réponse
temp.
degré de protection
tension d'alimentation
charge contact maxi.

Netz

tension

power

LS Frei

BS libre

LC free

output free

sortie libre

Ausgang frei

interdiction de redémarrage

restart interlock

Wiederanlaufsperre

LS unterbrochen

BS interrompue

LC interrupted

Made in Germany

TÜV Rheinland

AA

AA

TÜV Rheinland

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

25 mS

-10… + 55 °C
IP 20
230 VAC -15% +10 %, 50Hz
2 A, 250 VAC

LS gebrückt

Achtung Vor Abziehen der Klemmleiste Netzspannung abschalten!

Attention

Turn off the supply voltage !

Attention Couper l'alimentation !

L1

230VAC

N

L1

115VAC

LC muted

BS desactiveé

24VDC

Schaltgerät BWS Typ 4

Switching unit ESPE Type 4

Boîtier de commande ESPS Type 4

0 V DC

123

1234567

12

19

12

14

15

13

4

3

6

-

7
+

2

3
+

2

1

5

1

-

OSSD2

OSSD1

EDM

Start

LS 1A / LS 2A

LS 1B / LS 2B

LSUW

Reflektorband

LS 1A / LS 2A

LS 1B / LS 2B

LSUW

Alarm

7 Additional functions with safety switchgears - Muting

LSUW N1 Muting K switchgear

BA - ULVT

ULVT

Cable routing: Separately
from power lines. The cable
routing for the contactor
check (terminals D & 22)
must prevent short-circuiting
of wires.

If the sum of the currents to
terminals B, 10, 17 & 21
exceeds 2A, separate fuse
protection of M 2.0 A must
be provided for the contacts.

The hazardous movement
must only be activated via
output contacts 16-17 and

20-21.

The output contacts are
potential-free, monitored,
guided make contacts are
must be loaded with max. 2
A/250 VAC or 60 VDC, 30
W.

With inductive load, the load
(not the contacts) is to be
switched at the same time
as the spark arresting
sections (e.g. 0.22 uF,
220 Ω.

The contact B-11 serves as
an alarm path and is not
permitted to activate the
hazardous closing
movement.

When performing electric
welding work on the
machine, the terminal strip
of the switchgear is to be
removed, otherwise the
vagrant welding currents
may cause destruction of
the installed electronics.

ULVTS Transmitter

ULVTE Receiver

Set operating mode:

Without contactor check
Without restart interlock

(both functions are

performed by switchgear)

antivalent outputs

Muting sensor

LS 1B

in muting status

contacts closed

Muting sensor

LS 2B

in muting status

contacts closed

Muting sensor

LS 2A

in muting status

contacts closed

Muting sensor

LS 1A

in muting status

contacts closed

24V DC

0V

L1NL1

We will be happy to provide you with individual advice for planning your application
with muting function. The applications shown here are examples only.

Reflector
band

Voltage depending on type of
contactor, muting lamp and
alarm signal generator

Contactor
monitoring

X = For
interruption
of
hazardous
movement

Muting

lamp

Alarm

Spark arresting

sections

Optional power supply:
Terminal 1 & 2: 230 VAC -15% + 10%

or

Terminal 1 & 3: 115 VAC -15% + 10%

or

Terminal A & 12: 24 VDC -10% + 20%

For supply
with 230 / 115
VAC:
Bridge F- 14

For supply
with 24VDC
Bridge F- A

7.2.1 Cycle mode "A"

(Safety and control mode through cyclic penetration of the protective field)
e.g. Manual insertion work with 30 sec. work monitoring for controlling presses with a table height of 750 mm.

Connection diagram for operating mode "A"

FIESSLER

ELEKTRONIK

24

Functional example: (Press: 1-cycle and 2-cycle mode)
Having switched on the safety facility, the protective field must

be penetrated in order to carry out a startup test. Having
subsequently pressed the start button with the protective field
free and one or two interruptions and re-release, the output
contacts (16-17, 20-21) close and the machine movement is
started.

If the protective field is penetrated during a hazardous
movement of the press, this returns immediately to the upper
dead centre. A new operating stroke will only be performed
once the start button has been pressed and the light barrier
tested by means of one or two penetrations of the protective
field.

The checking path 6-7 is used to perform an additional check of
the hydraulic valves or the contactor. The activation of a new
operating stroke or a hazardous movement will only be
performed if both or valves K1 and K2 had fallen when the
protective field, and the protective field is subsequently free
again.

After 30 sec., the operating monitoring activates the restart
interlock if the protective field was not penetrated or re­released in the meantime.

A reset of the cycle counter circuit is performed through the
short-term interruption of terminal 10 - 11 (approx. 20 ms) via
a switch on the machine.

When activating the closing movement via contactors K1 and
K2, the respective make contacts of K1 and K2 must be
switched in series!

When switching between the operating modes with 1-cycle
and 2-cycle mode, the restart interlock must be activated in
accordance with EN 61496. This can be implemented by
switching off the transmitter during the switchover.

In this operating mode, it must be ensured that it
is not possible to walk behind the light barrier!

(Refer to Section 4.2)

123

1234567

12

X

12

13

15

14

4

3

6

-

7
+

2

3
+

2

1

5

1

-

OSSD1

EDM

Start

6

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. [phone]

Achtung Vor Abziehen der Klemmleiste Netzspannung abschalten!

Attention

Turn off the supply voltage !

Attention Couper l'alimentation !

A

1

2

3

7

4

5

8

10

9

17

B

C

12

13

14

15

16

LSUW NSR 3-1 K

No./year of construction
response time

t

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
24VDC/115VAC/230VAC

-15% +10 %, 50Hz

2 A, 250 VAC

18

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

19

20

21

22

LS unterbrochen

BS interrompue

LC interrupted

D

Made in Germany

11

TÜV Rheinland

AA

AA

TÜV Rheinland

N

L1 230 VAC

L1 115 VAC

0 V DC

+24VDC

k1
k2

XXX

X

M 2,0 A

K1

K2

M 2,0 A

k1
k2

M 2,0 A

M 2,0 A

M 2,0 A

OSSD2

7 Additional functions with safety switchgears - Time operation "A"

LSUW NSR 3-1 K switchgear

The hazardous movement must
only be activated via output
contacts 16-17 and 20-21.

The output contacts are
potential-free, monitored, guided
make contacts are must be
loaded with max. 2 A/250 VAC
or 60 VDC, 30 W. With inductive
load, the load (not the contacts)
is to be switched at the same
time as the spark arresting
sections (e.g. 0.22 uF, 220 Ω.
Optional power supply:

The contact 18 - 19 serves as an
alarm path and is not permitted
to activate the hazardous closing
movement.

To increase the switching
reliability, collateral contacts
should be used on terminals 5,
6, 7, 8, 9, 10, 11, D and 22. No
external potential must be
connected to these terminals.

When performing electric
welding work on the machine,
the terminal strip of the
switchgear is to be removed,
otherwise the vagrant welding
currents may cause destruction
of the installed electronics.

Cable routing:

- Separately from power lines.

- The cable routing for the contactor
check (terminals 6 & 7) must prevent
short-circuiting of wires.

- On terminals 4, 5, 8, 9, the max. cable
length is limited to <= 1m.

ULVTS Transmitter

ULVTE Receiver

Set operating mode:

Without contactor check
Without restart interlock

(both functions are

performed by switchgear)

antivalent outputs

Voltage depending on type of contactor

L1 = 230 V AC

or 24 V DC

Contactor
monitoring

Start button

X = For interruption
of hazardous
movement

Spark arresting

sections

N or 0V

24V DC

0V

With bridge: 1-cycle

Without bridge: 2-cycle

Reset of counting circuit of end or

pressure span at lower dead

centre UT

Fuses to be sized so
that contact
touching is
prevented reliably!

L1

N

L1

BA - ULVT

Connection diagram for operating mode "A"

Optional power supply:
Terminal 1 & 2: 230 VAC -15% + 10%

or

Terminal 1 & 3: 115 VAC -15% + 10%

or

Terminal A & 12: 24 VDC -10% + 20%

X

X

For 230 V AC and 115 V AC :
terminal 3

For 24 V DC :
terminal C

7.2.2 Safety mode with restart interlock during the entire "B" cycle

(Only when changing systems from LSUW to ULVT and retaining the switchgear)

e.g. For applications with manual cyclic penetrations of the protective field and restart via start button.

(Refer to ZH 1/281 and ZH 1/597 for example)
Presses with table heights below 750 mm with additional safety devices. Presses without control.
Rapid stamping machines which do not require cyclic testing.

Connection diagram for operating mode "B"

FIESSLER

ELEKTRONIK

25

Functional example

Having switched on the safety facility, the protective field must
be penetrated in order to carry out a startup test. Having
subsequently pressed the start button with the protective field
free, the output contacts 16-17 and 20-21 close and the
machine movement is started.

If the protective field of the light barrier is penetrated, the
contacts 16-17 and 20-21 are opened and the machine stopped.

The checking path 6-7 is used to perform an additional check of
the hydraulic valves or the contactor. The activation of a new
operating stroke or a hazardous movement will only be
performed if both or valves K1 and K2 had fallen when the
protective field, and the protective field is subsequently free
again.

When activating the closing movement via contactors K1 and
K2, the respective make contacts of K1 and K2 must be
switched in series!

The start button must be installed at point where
the hazardous area can easily be seen, and where
it cannot be actuated from within the hazardous
area without the light barrier being interrupted.

123

1234567

12

12

13

15

14

4

3

6

-

7
+

2

3
+

2

1

5

1

-

EDM

Start

6

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. [phone]

Achtung Vor Abziehen der Klemmleiste Netzspannung abschalten!

Attention

Turn off the supply voltage !

Attention Couper l'alimentation !

A

1

2

3

7

4

5

8

10

9

17

B

C

12

13

14

15

16

LSUW NSR 3-1 K

No./year of construction
response time

t

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
24VDC/115VAC/230VAC

-15% +10 %, 50Hz

2 A, 250 VAC

18

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

19

20

21

22

LS unterbrochen

BS interrompue

LC interrupted

D

Made in Germany

11

TÜV Rheinland

AA

AA

TÜV Rheinland

N

L1 230 VAC

L1 115 VAC

0 V DC

+24VDC

k1
k2

XXX

X

M 2,0 A

K1

K2

M 2,0 A

k1
k2

M 2,0 A

M 2,0 A

M 2,0 A

OSSD2

OSSD1

X

Voltage depending on type of contactor

L1 = 230 V AC

or 24 V DC

X = For interruption
of hazardous
movement

Spark arresting

sections

N or 0V

Fuses to be sized
so that contact
touching is
prevented reliably!

7 Additional functions with safety switchgears (only for system change) "B"

LSUW NSR 3-1 K switchgear

Cable routing:

- Separately from power lines.

- The cable routing for the contactor
check (terminals 6 & 7) must prevent
short-circuiting of wires.

- On terminals 4, 5, 8, 9, the max. cable
length is limited to <= 1m.

The hazardous movement must
only be activated via output
contacts 16-17 and 20-21.

The output contacts are
potential-free, monitored, guided
make contacts are must be
loaded with max. 2 A/250 VAC
or 60 VDC, 30 W. With inductive
load, the load (not the contacts)
is to be switched at the same
time as the spark arresting
sections (e.g. 0.22 uF, 220 Ω.
Optional power supply:

The contact 18 - 19 serves as an
alarm path and is not permitted
to activate the hazardous closing
movement.

To increase the switching
reliability, collateral contacts
should be used on terminals 5,
6, 7, 8, 9, 10, 11, D and 22. No
external potential must be
connected to these terminals.

When performing electric
welding work on the machine,
the terminal strip of the
switchgear is to be removed,
otherwise the vagrant welding
currents may cause destruction
of the installed electronics.

L1

24V DC

Start button

0V

N

L1

BA - ULVT

Optional power supply:
Terminal 1 & 2: 230 VAC -15% + 10%

or

Terminal 1 & 3: 115 VAC -15% + 10%

or

Terminal A & 12: 24 VDC -10% + 20%

ULVTS Transmitter

ULVTE Receiver

Set operating mode:

Without contactor check
Without restart interlock

(both functions are

performed by switchgear)

antivalent outputs

Contactor
monitoring

X

X

For 230 V AC and 115 V AC :
terminal 3

For 24 V DC :
terminal C

7.2.3 Selection mode (between cycle mode and safety mode with restart interlock, switchable operation)

Connection diagram for operating mode "AB"

FIESSLER

ELEKTRONIK

26

Function

(1-cycle and 2-cycle mode "A", refer to Section 7.2)
(Safety mode with restart interlock "B", refer to Section 7.3)

Using the BU operating mode selector, one of the three
operating modes, 1-cycle, 2-cycle or safety mode with restart
interlock, can be selected.

When switching between the operating modes, the restart
interlock must be activated in accordance with EN 61494. This
can be implemented by switching off the transmitter during the
switchover.

In the 1-cycle and 2-cycle operating modes, it
must be ensured that it is not possible to walk
behind the light barrier! (Refer to Section 4.4)

6

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. [phone]

Achtung Vor Abziehen der Klemmleiste Netzspannung abschalten!

Attention

Turn off the supply voltage !

Attention Couper l'alimentation !

A

1

2

3

7

4

5

8

10

9

17

B

C

12

13

14

15

16

LSUW NSR 3-1 K

No./year of construction
response time

t

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
24VDC/115VAC/230VAC

-15% +10 %, 50Hz

2 A, 250 VAC

18

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

19

20

21

22

LS unterbrochen

BS interrompue

LC interrupted

D

Made in Germany

11

TÜV Rheinland

AA

AA

TÜV Rheinland

N

L1 230 VAC

L1 115 VAC

0 V DC

+24VDC

k1
k2

XXX

X

K1

K2

M 2,0 A

M 2,0 A

BU4

BU2

BU3

BU1

BU5

M 2,0 A

k1
k2

M 2,0 A

M 2,0 A

123

1234567

12

12

13

15

14

4

3

6

-

7
+

2

3
+

2

1

5

1

-

OSSD2

OSSD1

EDM

Start

X

7 Additional functions with safety switchgears - Selection mode "AB"

LSUW NSR 3-1 K switchgear

BU1 BU2 BU3 BU4 BU5

1-cycle mode
2-cycle mode

Safety mode
with restart
interlock

Cable routing:

- Separately from power lines.

- The cable routing for the contactor
check (terminals 6 & 7) must prevent
short-circuiting of wires.

- On terminals 4, 5, 8, 9, the max. cable
length is limited to <= 1m.

The hazardous movement must
only be activated via output
contacts 16-17 and 20-21.

The output contacts are
potential-free, monitored, guided
make contacts are must be
loaded with max. 2 A/250 VAC
or 60 VDC, 30 W. With inductive
load, the load (not the contacts)
is to be switched at the same
time as the spark arresting
sections (e.g. 0.22 uF, 220 Ω.
Optional power supply:

The contact 18 - 19 serves as an
alarm path and is not permitted
to activate the hazardous closing
movement.

To increase the switching
reliability, collateral contacts
should be used on terminals 5,
6, 7, 8, 9, 10, 11, D and 22. No
external potential must be
connected to these terminals.

When performing electric
welding work on the machine,
the terminal strip of the
switchgear is to be removed,
otherwise the vagrant welding
currents may cause destruction
of the installed electronics.

Start button

0V

Contactor
monitoring

24V DC

L1

N

L1

BA - ULVT

Optional power supply:
Terminal 1 & 2: 230 VAC -15% + 10%

or

Terminal 1 & 3: 115 VAC -15% + 10%

or

Terminal A & 12: 24 VDC -10% + 20%

Voltage depending
on type of contactor

L1 = 230 V AC

or 24 V DC

X = For interruption
of hazardous
movement

Spark arresting

sections

N or 0V

Fuses to be sized

so that contact

touching is

prevented reliably!

ULVTS Transmitter

ULVTE Receiver

Set operating mode:

Without contactor check
Without restart interlock

(both functions are

performed by switchgear)

antivalent outputs

X

X

For 230 V AC and 115 V AC :
terminal 3

For 24 V DC :
terminal C

7.2.4 Safety mode with restart interlock during the hazardous movement "B1"

e.g. For applications with manual cyclic penetrations of the protective field during a non-hazardous movement or machine

standstill.

Connection diagram for operating mode "B1"

FIESSLER

ELEKTRONIK

27

Functional example

Having switched on the safety facility, the protective field must
be penetrated in order to carry out a startup test. Having
subsequently pressed the start button with the protective field
free, the output contacts 16-17 and 20-21 close and the
machine movement is started.

If the protective field of the light barrier is penetrated during
the hazardous movement, the contacts 16-17 and 20-21 are
opened and the machine stopped.

The checking path 6-7 is used to perform an additional check
of the hydraulic valves or the contactor. The activation of a new
operating stroke or a hazardous movement will only be
performed if both or valves K1 and K2 had fallen when the
protective field, and the protective field is subsequently free
again.

During the idling status of the operating materials, or during a
non-hazardous opening movement (opened switch "S"), its is
possible to access the operating materials at any time without
having to press the start button.

When activating the closing movement via contactors K1 and
K2, the respective make contacts of K1 and K2 must be
switched in series!

In this operating mode, it must be ensured that it
is not possible to walk behind the light barrier!

(Refer to Section 4.4)

123

1234567

12

12

13

15

14

4

3

6

-

7
+

2

3
+

2

1

5

1

-

OSSD2

OSSD1

EDM

Start

6

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. [phone]

Achtung Vor Abziehen der Klemmleiste Netzspannung abschalten!

Attention

Turn off the supply voltage !

Attention Couper l'alimentation !

A

1

2

3

7

4

5

8

10

9

17

B

C

12

13

14

15

16

LSUW NSR 3-1 K

No./year of construction
response time

t

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
24VDC/115VAC/230VAC

-15% +10 %, 50Hz

2 A, 250 VAC

18

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

19

20

21

22

LS unterbrochen

BS interrompue

LC interrupted

D

Made in Germany

11

TÜV Rheinland

AA

AA

TÜV Rheinland

N

L1 230 VAC

L1 115 VAC

0 V DC

+24VDC

k1
k2

XXX

X

M 2,0 A

K1

K2

M 2,0 A

k1
k2

M 2,0 A

M 2,0 A

M 2,0 A

S

X

7 Additional functions with safety switchgears - "B1"

LSUW NSR 3-1 K switchgear

Cable routing:

- Separately from power lines.

- The cable routing for the contactor
check (terminals 6 & 7) must prevent
short-circuiting of wires.

- On terminals 4, 5, 8, 9, the max. cable
length is limited to <= 1m.

The hazardous movement must
only be activated via output
contacts 16-17 and 20-21.

The output contacts are
potential-free, monitored, guided
make contacts are must be
loaded with max. 2 A/250 VAC
or 60 VDC, 30 W. With inductive
load, the load (not the contacts)
is to be switched at the same
time as the spark arresting
sections (e.g. 0.22 uF, 220 Ω.
Optional power supply:

The contact 18 - 19 serves as an
alarm path and is not permitted
to activate the hazardous closing
movement.

To increase the switching
reliability, collateral contacts
should be used on terminals 5,
6, 7, 8, 9, 10, 11, D and 22. No
external potential must be
connected to these terminals.

When performing electric
welding work on the machine,
the terminal strip of the
switchgear is to be removed,
otherwise the vagrant welding
currents may cause destruction
of the installed electronics.

Start button

0V

24V DC

L1

N

L1

BA - ULVT

Optional power supply:
Terminal 1 & 2: 230 VAC -15% + 10%

or

Terminal 1 & 3: 115 VAC -15% + 10%

or

Terminal A & 12: 24 VDC -10% + 20%

ULVTS Transmitter

ULVTE Receiver

Set operating mode:

Without contactor check
Without restart interlock

(both functions are

performed by switchgear)

antivalent outputs

Voltage depending on type of contactor

L1 = 230 V AC

or 24 V DC

Contactor
monitoring

X = For interruption
of hazardous
movement

Spark arresting

sections

N or 0V

Fuses to be sized so
that contact
touching is
prevented reliably!

X

X

For 230 V AC and 115 V AC :
terminal 3

For 24 V DC :
terminal C

7.2.5 Safety mode without restart interlock with valve or contactor check

(Only when changing systems from LSUW to ULVT and retaining the switchgear)
e.g. For the protection of force-driven operating materials or the implementation of the restart interlock in the machine

Connection diagram for operating mode "C"

FIESSLER

ELEKTRONIK

28

Function

Having switched on the safety facility, the protective field must
be penetrated in order to carry out a startup test. Subsequent to
the re-release of the protective field, the output contacts 16-17
and 20-21 close and check contact 18-19 is interrupted. The
output 18-19 serves as a check contact and is thus not
permissible as a contact for activating the hazardous
movement.

When the protective field is penetrated, the output contacts 16­17 and 20-21 open the check contact 18-19 closes.

The connecting contactor 6-7 also provides an additional check
of the contactors which activate the hazardous movement.

In this operating mode, it must be ensured that it
is not possible to walk behind the light barrier!

(Refer to Section 4.4)

123

1234567

12

12

13

15

14

4

3

6

-

7
+

2

3
+

2

1

5

1

-

OSSD2

OSSD1

EDM

Start

6

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. [phone]

Achtung Vor Abziehen der Klemmleiste Netzspannung abschalten!

Attention

Turn off the supply voltage !

Attention Couper l'alimentation !

A

1

2

3

7

4

5

8

10

9

17

B

C

12

13

14

15

16

LSUW NSR 3-1 K

No./year of construction
response time

t

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
24VDC/115VAC/230VAC

-15% +10 %, 50Hz

2 A, 250 VAC

18

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

19

20

21

22

LS unterbrochen

BS interrompue

LC interrupted

D

Made in Germany

11

TÜV Rheinland

AA

AA

TÜV Rheinland

N

L1 230 VAC

L1 115 VAC

0 V DC

+24VDC

k1
k2

XXX

X

M 2,0 A

K1

K2

M 2,0 A

k1
k2

M 2,0 A

M 2,0 A

M 2,0 A

X

7 Additional functions with safety switchgears - "C"

LSUW NSR 3-1 K switchgear

The hazardous movement must
only be activated via output
contacts 16-17 and 20-21.

The output contacts are
potential-free, monitored, guided
make contacts are must be
loaded with max. 2 A/250 VAC
or 60 VDC, 30 W. With inductive
load, the load (not the contacts)
is to be switched at the same
time as the spark arresting
sections (e.g. 0.22 uF, 220 Ω.
Optional power supply:

The contact 18 - 19 serves as an
alarm path and is not permitted
to activate the hazardous closing
movement.

To increase the switching
reliability, collateral contacts
should be used on terminals 5,
6, 7, 8, 9, 10, 11, D and 22. No
external potential must be
connected to these terminals.

When performing electric
welding work on the machine,
the terminal strip of the
switchgear is to be removed,
otherwise the vagrant welding
currents may cause destruction
of the installed electronics.

0V

24V DC

L1

N

L1

BA - ULVT

Optional power supply:
Terminal 1 & 2: 230 VAC -15% + 10%

or

Terminal 1 & 3: 115 VAC -15% + 10%

or

Terminal A & 12: 24 VDC -10% + 20%

Cable routing:

- Separately from power lines.

- The cable routing for the contactor
check (te0rminals 6 & 7) must prevent short­circuiting of wires.

- On terminals 4, 5, 8, 9, the max. cable length is
limited to <= 1m.

ULVTS Transmitter

ULVTE Receiver

Set operating mode:

Without contactor

check

Without restart

interlock

(both functions are

p

Voltage depending on type of contactor

L1 = 230 V AC

or 24 V DC

Contactor
monitoring

X = For interruption
of hazardous
movement

Spark arresting

sections

N or 0V

Fuses to be sized
so that contact
touching is
prevented reliably!

X

X

For 230 V AC and 115 V AC :
terminal 3

For 24 V DC :
terminal C

7.3 Potential-free switching contacts and universal power supply

The ULSG switchgear provides potential-free output contacts and a universal power supply (either 230 VAC, 115 VAC, or
24VDC connection). 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.

Anschlußschaltbild

FIESSLER

ELEKTRONIK

Connection examples

230 VAC connection / external contactors
control hazardous movement

Having pressed the start button with a free
protective field, the potential-free output contacts
13-14 and 15-16 close and the connected
contactors K1 and K2 respond. When activating
the closing movement via contactors K1 and K2,
the respective make contacts of K1 and K2 must
be switched in series!

The connecting pin 2 (EDM = contactor check)
on the receiver also provides an additional
check of the contactors or hydraulic valves
which activate the hazardous movement.
If the protective field is penetrated, the output
contacts are opened and the movement
interrupted.
Operation can only be continued once the start
button has been pressed. The activation of a
new operating stroke or a hazardous movement
will only be performed if both or valves K1 and
K2 had fallen when the protective field, and the
protective field is subsequently free again.

In the operating mode without restart interlock,
the connecting pin 1 (start) on the receiver must
be left free.

24 VDC connection / the output contacts 13­14 and 15-16 directly control the hazardous
movement

Control of the hazardous movement of the
operating material is performed directly via the
potential-free output contacts 13-14 and 15-16.

The activation of the hazardous movement is
implemented as described in the above
example.

In the operating mode without restart interlock,
the connecting pin 1 (start) on the receiver must
be left free.

k1
k2

x

x

x

xxx

L1

N

4

3

6

-

7
+

2

3
+

K1

K2

M 2A

M 2A

k1

k2

FIESSLER

E L E K T R O N I K

Typ: ULSG 230V

TÜV Rheinland

23145 7 8 9 10 12 13 14 15

Schaltgerät BWS Typ 2 / 4

Switching unit ESPE Type 2 / 4

Boîtier de commande ESPE Type 2 / 4

Kastellstr.9 73734 Esslingen
Tel. [phone]

Achtung Vor Abziehen der Klemmleiste Netzspannung abschalten!

Attention

Turn off the supply voltage !

Attention Couper l'alimentation !

Nr./Baujahr No./year of construction No./année de fabrication .................................

Ansprechzeit response time temps de réponse 6 mS + BWS / ESPE
Temp. temp. temp. -10… + 55 °C
Schutzart enclosure rating degré de protection IP 20
Versorgung supply voltage tension d'alimentation 230 VAC -15% +10 %, 50Hz
Kontaktbel. contact max. charge contact maxi. 2 A, 250 VAC

Made in Germany

SK230V 115V

---------- 24V ---------

----- 0V -----

A1 A2N

2

1

5

16611

ST

1

-

OSSD2

OSSD1

EDM

Start

7 Additional functions with safety switchgears

ULSG switchgear

24V

0V

M 2A

FIESSLER

E L E K T R O N I K

Typ: ULSG 230V

TÜV Rheinland

23145 7 8 9 10 12 13 14 15

Schaltgerät BWS Typ 2 / 4

Switching unit ESPE Type 2 / 4

Boîtier de commande ESPE Type 2 / 4

Kastellstr.9 73734 Esslingen
Tel. [phone]

Achtung Vor Abziehen der Klemmleiste Netzspannung abschalten!

Attention

Turn off the supply voltage !

Attention Couper l'alimentation !

Nr./Baujahr No./year of construction No./année de fabrication .................................

Ansprechzeit response time temps de réponse 6 mS + BWS / ESPE
Temp. temp. temp. -10… + 55 °C
Schutzart enclosure rating degré de protection IP 20
Versorgung supply voltage tension d'alimentation 230 VAC -15% +10 %, 50Hz
Kontaktbel. contact max. charge contact maxi. 2 A, 250 VAC

Made in Germany

SK230V 115V

---------- 24V ---------

----- 0V -----

A1 A2N

16611

ST

M

OSSD2

OSSD1

EDM

Start

4

3

6

-

7
+

2

3
+

2

1

51

-

ULVTE Receiver

ULVTS

Transmitter

L1 = 230
VAC or 24
VDC
Voltage
depending on
type of
contactor

Contactor
monitoring

X =
For interruption of hazardous
movement

N or
0V

Set operating mode:

- With contactor check

- With restart interlock

- equivalent outputs

Terminal 1 & 3: 230
VAC -15% + 10%

or

Terminal 2 & 3: 115
VAC -15% + 10%

N or
0V

Terminal 4 & 7:
24 VDC -10% + 15%

When performing electric welding work on the machine, the terminal strip of the
switchgear is to be removed, otherwise the vagrant welding currents may cause
destruction of the installed electronics.

Cable routing: Separately from power lines.
The hazardous movement must only be activated via output contacts 16-17 and
20-21. The output contacts are potential-free, monitored, guided make contacts
are must be loaded with max. 2 A/250 VAC or 60 VDC, 30 W. With inductive load,
the load (not the contacts) is to be switched at the same time as the spark
arresting sections (e.g. 0.22 uF, 220 Ω. hazardous closing movement.
To increase the switching reliability, collateral contacts should be used on

BA - ULVT

29

ULVTE ReceiverULVTS

Transmitter

L1 = 230
VAC or 24
VDC
Voltage
depending on
type of
contactor

Set operating mode:

- With contactor check

- With restart interlock

- equivalent outputs

Start interlock

Subsequent to commissioning and/or a power interruption, the start interlock prevents a "re-release". A re-release is only possible
once the protective field has been interrupted and reactivated.

Response time

The time period between penetration of the protective field and the switching process.

EPSE Type 4

The ULVT... safety light barriers comprise photo-electric guards. These devices are characterized by the fact that when the
protective field generated by the transmitter and receiver is interrupted, a hazardous movement is interrupted or prevented.

One-cycle (two-cycle operating mode)

Subsequent to one (two) penetrations, the machine automatically performs an operating cycle and then waits for a maximum 30
seconds for one (two) penetrations.
If the time period exceeds 30 seconds, the restart interlock is activated.

Installation range

(Fig. 30/1)

The minimum and/or maximum permissible distance between the transmitter and
receiver. The permissible installation range is specified on the ULVT receiver.

Obstacle size

(Fig. 30/1)

The obstacle size indicates the minimum obstacle diameter that will definitely interrupt a
hazardous movement through the safety light barriers.
The following obstacle sizes are provided by the beam distances for the ULVT... safety
light barriers:

Muting

Temporary and safe bridging of the ULVT safety light barriers during a material
movement, e.g. into and out of a manufacturing cell, or in high-bay storage. Reliable
differentiation between man and material flow is ensured.

Overrrun

The section of hazardous movement which occurs after penetration of the protective field.
Overrrun traverse

(Fig. 30/2)

The path traversed during the run-on period (e.g. path of a ram, path of a point on a roller surface).

Overrrun period

Duration of the run-on period.

Protective field height

(Fig. 30/1)

Height of the protective field generated by the transmitter and receiver.

Safety mode

When the protective field is interrupted, the switching outputs are blocked, then
automatically released subsequent to re-release of the protective field.

Self-monitoring

The automatic response of the photo-electric guard in the event of an internal
malfunction.

Safe distance (Fig. 30/2)

The minimum distance S between safety light barrier and the nearest hazardous area, required in order to prevent injuries. In
order to establish the minimum safe distance, the formulas from standard EN 999, the machine-specific C standards and the
effective ZH guidelines are to be used.

Safety category 4

The ULVT safety light barriers belong to safety category 4 as per EN 945-1 and IEC 61496 / EN 61496.
Devices of safety category 4 comprise self-monitoring photo-electric guards and represent the highest safety class for photo-

30

FIESSLER

ELEKTRONIK

Min. / max. installation range 0,3m / 7 m 0,3m / 24 m
min. obstacle size 14 mm 30 mm
min./max. protective field height 100 mm / 1900 mm 100 mm / 1900 mm

S

Nachlaufweg
der Maschine

8 Terminology

protective field height

Installation range

Obstacle size

Fig. 30/2 Safe distance and overrun traverse

Fig. 30/1 Installation range, obstacle size,
protective field height

BA - ULVT

overrun
traverse

electric guards.

Beam spacing

The distance (gap) between the centres of the individual lenses on ULVT... safety light barriers is called the beam distance. The
ULVT... safety light barriers are supplied with a lens grid of 7.5 mm.

Valve or contactor check

Prior to each release of the switching outputs, the contactor identifies whether the connected switching elements (relays,
contactors or valves) have fallen. Only when this is so can a new release of the switching inputs be performed. This also prevents
the dangerous failure of the switching elements (relays, contactors, valves) of the hazardous movement.

Restart interlock

The restart interlock prevents the automatic release of the switching outputs subsequent to the interruption and reactivation of the
protective field (e.g. due to walking through the protective field).

31

FIESSLER

ELEKTRONIK

8 Terminology

BA - ULVT

FIESSLER

ELEKTRONIK

32

9 Specifications - Transmitter and receiver

ULVTS / ULVTECharacteristic data

Mechanical data

Operating data

Electric data

Safety category 4 pursuant to EN 954-1 and IEC 61496 / EN 61496

Protective field heights 100 mm ... 3000 mm (depending on number of beams)

Protective field width 0,3… 7 m , 0,3...24 m

Construction lengths 196 mm ... 1996 mm (depending on number of beams)

Definition 14 mm

Number of beams 13 ... 247 beams

Operating modes

(selected via DIP switches,
see also Sections 3.5 and 7)

- With / without restart interlock

- With / without contactor check

- equivalent / antivalent outputs

- Muting (only with optional LSUW N1 Muting K switchgear)

- Cycle mode with 1 cycle / 2 cycles (only with optional LSUW NSR3-1 K switchgear)

- Safety mode with restart interlock only during the hazardous movement (only with optional LSUW NSR3-1 K
switchgear)

Housing design

Aluminium profile, plastic-coated RAL 1020, yellow, end pieces made from non-corrosive, spherically reinforced
plastic (polyamide). Plexiglass light outlet and inlet, optional with solvent-resistant silicate glass.

Attachment Shifting fastening brackets on rear side of housing

Weight

Transmitter: 0.45 kg to 4.5 kg depending on construction length
Receiver: 0.5 kg to 5.0 kg depending on construction length

Protection category IP 65

Protection class

III

Operating ambient temperature

-10 bis 55 °C

Storage temperature

-25 bis 70 °C

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 (no 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
not failsafe, max. 20 mA)

Inputs - Contactor check and start button inputs: 0 V to 24 VDC

_

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-pol. max. 1,5 mm

2

5 to 7-pin (depending on operating mode), max. 1.5 mm2

BA - ULVT

FIESSLER

ELEKTRONIK

33

9 Specifications - Safety switching units

Safety category 4 pursuant to EN 954-1 and IEC 61496 / EN 61496

Operating modes

(selected via DIP switches,
see also Sections 3.5 and 7)

- Muting (only with LSUW N1 Muting K switchgear)

- Cycle mode with 1 cycle / 2 cycles (only with LSUW NSR3-1 K switchgear)

- Safety mode with restart interlock only during the hazardous movement (only with LSUW NSR3-1 K switchgear)

Response time

LSUW N1 Muting K: 29 ms

- LSUW NSR3-1 K: 25 ms

- ULSG: 6 ms

Power supply Optionally 230 VAC/50 Hz + 10% -15%, 115 VAC/50 Hz + 10% - 15%, 24 VDC, +20% - 10%, reverse polarity protected

Current draw max. 250 mA

Outputs

The output contacts are potential-free, monitored (with ULSG only in conjunction with ULVT), guided make contact

s

are must be loaded with max. 2 A/250 VAC or 60 VDC, 30 W.

Inputs

Contactor check and start button inputs:
0 V to 24 VDC _+ 20%

Electric connection Plug-on terminal strip

Connecting cable max. 1,5 mm

2

Protection category IP 20

Protection class Shockproof

Operating ambient temp. -10 bis 55 °C
Storage temperature -25 bis 70 °C

Optional LSUW NSR 3-1K / LSUW N1 Muting K / ULSG switchgearsCharacteristic data

Mechanical data

Operating data

Electric data

Housing design Insulated black housing, curved lid

Attachment Snap-on mounting on top hat rail DIN EN 50022-35, threaded mounting

Weight

ULSG: 1200 g
LSUW NSR 3-1K / LSUW N1 Muting K: 1700 g

BA - ULVT

FIESSLER

ELEKTRONIK

34

ULVT transmitter / receiver

10 Dimensions drawings - Transmitter and receiver

26 mm

23 mm

PG 9

11 mm

59 mm

Schutzfeldhöhe

Baulänge

redŽmarrage

adjustment

ˆjustement

LC interrupt

interrompu

7: 24VDC
±20%

ULVTE Empfänger

D-73734 Esslingen, Kastellstr.9
0711/91 96 97 -0

1234 567

ULVT Receiver/Récepteur

Justierhilfe

LS frei

restart

LC free

libre

BWS Typ4, ESPE Type4 , ESPS Type4

FIESSLER

LS

unterbrochen

Wiederanlauf

sperre

E L E K T R O N I K

Made in Germany

3:OSSD1

6: 0V

5:

2: EDM

4: OSSD2

1: Start

61 mm

40 mm

Fig. 34/1 Dimensions of transmitter / receiver

Fig.34/2 Fastening brackets

7 mm

9 11 11 9

5,5

10,5

7 mm

5,5

10,5

9

11

11 9

M6

9mm

5,1mm

40 mm

5 mm dick

9mm

5,1mm

5 mm dick

M6

22 mm

12 mm

22 mm

22 mm

12 mm

22 mm

120 mm

100 mm

40 mm

Fastening brackets

Protective field height

Construction length

Housing design:

Aluminium profile, plastic-coated RAL 1020, yellow, end pieces made from
non-corrosive, spherically reinforced plastic (polyamide). Plexiglass light outlet
and inlet, optional with solvent-resistant silicate glass.

Attachment:

Shifting fastening brackets on rear side of housing

Shifting fastening brackets

Protective field

height (mm) /
no. of beams

Construction

length (mm)

100 / X 196

200 / X 296
300 / X 396
400 / X 496
500 / X 596
600 / X 696
700 / X 796
800 / X 896

900 / X 996
1000 / X 1096
1100 / X 1196
1200 / X 1296
1300 / X 1396
1400 / X 1496
1500 / X 1596
1600 / X 1696
1700 / X 1796
1800 / X 1896
1900 / X 1996

BA - ULVT

Mounting with optionlal mounting angle

Mounting with optionlal mounting angle

for fastening angle,

Sick Typ FGS

FIESSLER

ELEKTRONIK

FIESSLER

E L E K T R O N I K

50

ø 7

110

30

11

50

5

32

35

10 Dimensions drawings -mounting angle

BA - ULVT

FIESSLER

E L E K T R O N I K

Fixing possiblities for
Fastening angle Sick
Typ FGS

Housing design:

Distortion-free aluminium dual-chamber profile, plastic-coated RAL 1021, yellow

Attachment:

Spherical head screw

Dimensions drawing Form factors

Installation information:

1. Insert the spherical head screw into the pocket hole as shown in the drawing.

2. Insert the press pin.

3. Screw in the hexagon screw and tighten using a 5 mm Allan key.
The mirror can be attached to a holder with the aid of the spherical head screw.

Further installation options are provided by the threaded bores on the mirror profile.

FIESSLER

ELEKTRONIK

LP

116

44

7

60

90

LB ± 2 mm

36

M10

M10

Innensechskantschlüssel 5 mm

Druckstift

Schwenkbereich ± 30 °

Assembly drawing

* Attachment only via ball joint

10 Dimensions drawings - Tilted mirrors

For protective field height

Profile length LP

Attachment distance LB

Weight g

order no.

100 200 Central* 1667 usp100
200 300 195 2297 usp200
300 400 295 2927 usp300
400 500 395 3557 usp400
500 600 495 4187 usp500
600 700 595 4817 usp600
700 800 695 5447 usp700
800 900 795 6077 usp800

900 1000 895 6707 usp900
1000 1100 995 7337 usp1000
1100 1200 1095 7967 usp1100
1200 1300 1195 8597 usp1200
1300 1400 1295 9227 usp1300
1400 1500 1395 9857 usp1400
1500 1600 1495 10487 usp1500
1600 1700 1595 11117 usp1600
1700 1800 1695 11747 usp1700
1800 1900 1795 12377 usp1800
1900 2000 1895 13007 usp1900

BA - ULVT

Press pin

Allan key 5 mm

Swivel range _+ 30°

FIESSLER

ELEKTRONIK

37

10 Dimensions drawings - Switchgears

BA - ULVT

Optional LSUW NSR 3-1k / LSUW N1 Muting K safety switchgears

Housing design:

Insulated black housing, curved lid

Attachment:

Snap-on mounting on top hat rail DIN EN
50022-35, threaded mounting

Protection category:

IP 20
(For the ULSG and LSUW N1 Muting K
switchgears, an attachment housing with
protection category IP 55 is available.)

Electric connection:

Plug-on terminal strip

Weight:

ULSG: 800 g
LSUW NSR 3-1K: 2500 g
LSUW N1 Muting K: 2500 g

FIESSLER

ELEKTRONIK

38

11 Accessories

Accessories Order designation

Rubber-metal connection
(for intense vibrations)

Refer to Page 14 Per bracket SM

mounting angle

Refer to Page 35 BW-K

Test rod
(for daily function inspection)

Refer to Page 19 14 mm PS 14

Tilted mirror Refer to Page 35 SP 100 … SP 2000
Silicate glass

(solvent-resistant)

Refer to Page 20 UGL 100 … UGL 2000

Assembly columns for transmitter and receiver Refer to Page 15/16 MS 1250 SE

Assembly columns complete with tilted mirrors Refer to Page 15/16 MS 1250 US

Adjustment laser Refer to Page 19 JL2

EX-protection Refer to Page 19 EXP

BA - ULVT

FIESSLER

ELEKTRONIK

39

BA - ULVT

BA - ULVT

Doku Nr. 541 Stand 28.3.2001 / RK

0018452

Counting barriers

Hole seeking device

Safety switching mats

FIESSLER

E L E K T R O N I K

Turbidity sensors

FIESSLER

E L E K T R O N I K

Analog sag sensor

Safety light bars

TÜV Rheinland

Safety light barriers

TÜV Rheinland

FIESSLER

E L E K T R O N I K

Reference sensor

Switching end and measuring light barriers

Elevator light bars

EX-Light - Barrier Light-Barrier for general applications

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Your application

Fiessler Elektronik
Kastellstr. 9 D-73734 Esslingen
Telefon: +49 711 / 91 96 97-0
Telefax: +49 711 / 91 96 97-50
www.fiessler.de
E-Mail:[e-mail]

Single-beam safety light barriers

Alarm

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Safety light bars with muting function

TÜV Rheinland

FIESSLER

E L E K T R O N I K

Sendeebene

Surface scanner

TÜV Rheinland

Folding press protection

Product range: