SICK WEU 26/2, WSU 26/2 Technical Description

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TECHNICAL DESCRIPTION

WSU 26/2 – WEU 26/2

Photoelectric Safety Switch

‡ EASY INSTALLATION †

‡ UNIVERSAL USABILITY†

‡ SOLID CONSTRUCTION †

Contents

SICK WSU 26/2 – WEU 26/2

1 General Introduction 3

2 Device/System

Construction 4

3 Description of Function 4

Possible Areas of Application and Application Conditions

4.1 Possible Areas of Application 5

4.2 Application Conditions 5

5 Mechanical Arrangement

and Mounting 6

5.1 Safety Distance 6

5.2 Mechanical Mounting 7

5.3 Multiple Safeguarding 8

5.3.1 Mutual Interference 8

5.4 Corner Mirrors 10

6 Mounting 11

6.1 Mounting Requirements 11

6.2 Detecting Reflections 11

7 Electrical Connection 13

7.1 General 13

7.2 Wiring Diagram 14

12 Technical Data 25

13 Dimensional Drawing 26

At a glance: What is new?

15 Selection Table,

WSU/WEU 32

15.1 Conversion List 33

16 Selection Table,

Accessories 34

Standards and Regulations

To be observed in use and installation

Approvals

EU Europe

EC prototype test conducted by

BG - Berufsgenossenschaft (Trade association) Fachausschuß Eisen und Metall III (Technical committee for iron and metal III) Graf-Recke-Str. 69 D-40239 Düsseldorf

Approval number: 97074

8 Commissioning 22

8.1 Alignment of WSU and WEU 22

8.2 Alignment of WSU and WEU with Alignment Aid AR 60 22

8.3 Checking 22

9 Maintenance 23

10 Commissioning 23

11 Malfunctions 23

11.1 Diagnostic Elements 23

This technical description must be observed when installing and commissioning the WSU 26/2 - WEU 26/2. Inspection and commissioning must be carried out by specialists, if this is specified in the directives or guidelines.

Warning

Failure to observe may result in dangerous operation

Usage

Information regarding how to use the product correctly and efficiently

Generally recognized technical regulations and quality assurance system ISO 9000 are carefully applied during the development and production of SICK products.

SICK WSU 26/2 – WEU 26/2

1 General Introduction

The WSU 26/2 / WEU 26/2 photoelectric safety switch is a single-beam non-contact protective system. It consists of a WSU light sender and a WEU light receiver. The light beam between the emitting and receiving units provides access protection for hazardous areas.

The safety switch is designed for industrial applications. Its features include

‡ universal usability ‡ easy installation ‡ solid construction ‡ heated front screen, i.e. it can be

deployed even in unfavorable ambient conditions.

The WSU/WEU complies with safety requirements according to pr EN 50.100, safety category type 4.

The following key data are applicable in practical use:

Beam diameter

WSU WEU

Fig. 1: System construction of the WSU 26/2 / WEU 26/2 photoelectric safety switch

Scanning range 0.5 ... 18 m

15 ... 70 m

Beam diameter 23 mm

23 mm

Range

3 Description of Function

2 Device/System Construction

SICK WSU 26/2 – WEU 26/2

The WSU/WEU comprises:

‡ WSU 26/2 sender unit and ‡ WEU 26/2 receiver unit

Each complete break in the light beam between the light sender and light receiver triggers a signal which can be used to immediately stop the dangerous movement of the power-driven machinery (abbreviated as ”PDM”).

The WSU/WEU 26/2 must not be used as a hand or finger guard.

3 Description of Function

The WSU and WEU are mounted separately in die-cast housings. Each has its own power supply (Fig. 2). The WSU contains a clock generator and the sender diode. The diode emits infrared pulses at the clock rate set by the generator, which are evaluated by the receiver unit WEU if the light path is uninterrupted. The WEU contains the output relays A and B, which pick up if the light path is uninterrupted. If the light path or the connection between terminals 10 and 11 on the WSU is interrupted (testing), both relays are released.

The WSU 26/2 / WEU 26/2 serves as a protective cut-off device to protect hazardous areas on powerdriven machinery. The machinery may be:

‡ plastics machinery ‡ stackers ‡ settling machinery

in the stoneworking industry

‡ machining centers

1 Connection

for power supply 2 Power supply 3 Clock generator 4 Sender diode 5 LED, WSU 6 LED, WEU 7 Photoelectric converter 8 Amplifier 9 Relay with positively-driven contacts 10 Outputs 11 Test contact

Fig. 2: Principle of function of the WSU/WEU 26/2, AC version

SICK WSU 26/2 – WEU 26/2

4 Possible Areas of Application and Application Conditions

4 Possible Areas of Application

4.1 Possible Areas of Application

The WSU/WEU provides access protection for hazardous areas (Fig. 3).

4.2 Application Conditions

Safe cut-off can only be effected when the light beam diameter of 23 mm is fully covered.

The protective function of the WSU/WEU is ensured when the conditions set out in the adjacent box are met.

The power-driven machinery (”PDM”) must be controllable by electrical means.

The dangerous movement of the machine must be able to be stopped at any time.

The WSU/WEU must be positioned so that entry into the hazardous area is only possible by breaking the light beam.

The command unit must be positioned so that it cannot be activated from the hazardous area.

5 Mechanical Arrangement

5 Mechanical Arrangement and Mounting

SICK WSU 26/2 – WEU 26/2

5.1 Safety distance

The WSU/WEU must be attached such that, if the light beam is broken during hazardous movement of the machinery, the point-of-operation can only be reached when this hazardous movement has ceased. For this purpose, a safety distance S must be maintained between the nearest boundary of the point-of-operation and the light beam (Fig. 4). The safety distance depends on the machine stopping time and on the approach speed of the personnel.

The machine stopping time must be determined by repeating measurements under practical conditions. 1.6 m/s is the recommended approach speed. The safety distance is calculated as follows:

S = v (t

+ t2) + C

Mechanical safeguarding

Entry/exit guarding with WSU/WEU

Fig. 4: Safety distance to light beam

Direction of entry into hazardous area

Table 1 shows which C value must be used for which application.

Point-of-operation

S Safety distance (mm) v Approach speed

1.6 m/s

Machine stopping time (ms)

Response time of WEU (22 ms)

C Dependent on number of beams

(1, 2, or 3), see Table 1

pr EN 999 Safety of machinery Approach speed of body parts for arrangement of protective systems

Number of beams 01 02 03

Height of beam(s) 750 400 0300 above floor (mm) 900 0700

1100

C 1200 850 0850

Table 1: Height of beams above floor

The WSU/WEU must be attached such that, if the light beam is broken during hazardous movement of the machinery, the pointof-operation can only be reached when the power-driven machinery is no longer in a hazardous state.

For this purpose, a safety distance must be maintained between the light beam and the nearest boundary of the point-of-operation. This safety distance is determined according to pr EN 999.

People within the hazardous area but outside the light beam are not detected. It must, however, be ensured that any hazardous state can only be initiated when there is no one in the hazardous area.

Use and mounting of the protective systems is subject to the relevant official rules and regulations. These provisions differ depending on the area of application.

SICK WSU 26/2 – WEU 26/2

5.2 Mechanical Mounting

The WSU and WEU units can be mounted on one of the sides of their housing or using the mounting bracket, depending on site circumstances. The mounting bracket greatly assists alignment. The devices can be mounted in any operating position. However, the WSU and WEU should be mounted such that the axis of the light beam emitted by the WSU always matches the axis of the WEU optic (alignment sight).

The mounting brackets should be affixed so that all fixing screws are easily accessible for alignment purposes. Figure 5 shows examples. The devices should be attached such that the opposing device can be aligned in the alignment sight.

When using the 15 + PE plug, mounting modes a and b are not possible.

Order number Mounting bracket 2 007 900

If, for reasons of space, the devices need to be arranged as shown in Figures 5 a and b, hexagon screws must be used.

Fig. 5: Mounting options using a mounting bracket

5.3 Multiple Safeguarding

When using two WSU/WEU units in a protective system, the possibility of mutual interference must be excluded. Since the light beam of the WSU diverges, the cross-section of the beam increases as the distance between the WSU and WEU grows. The following conditions must therefore be met when arranging the WSU/WEU:

SICK WSU 26/2 – WEU 26/2

approx. 900

approx. 400

5.3.1 Mutual Interference

The light beam of the WSU must only be received by the corresponding WEU. To prevent mutual interference between several WSU/WEU installations arranged adjacent to or above each other, the specified beam diameters must be taken into account when mounting the devices (Fig. 6).

There are two versions of the WSU, for operating ranges

0.5 ... 18 m and 15 ... 70 m. The WSU must not be used for operating ranges below 15 m. The operating range is given on the rating plate.

Mutual interference is possible

Corner mirror

Fig. 6: Safeguarding a hazardous area with WSU/WEU

SICK WSU 26/2 – WEU 26/2

WEU

WSU

WEU

Fig. 7: Mounting of two WSU/WEU units in series

WSU

WEU

5.4 Corner mirrors

SICK WSU 26/2 – WEU 26/2

In conjunction with corner mirrors, the WSU/WEU provides multisided, two-beam access protection (Fig. 8 and 9).

Corner mirror

Hazardous area

Power-driven machinery (PDM)

Corner mirror

Hazardous area

Power-driven machinery (PDM)

Corner mirror

The use of corner mirrors reduces the scanning range of the WSU/WEU system as cited in the table.

Number of mirrors Reduced scanning range Reduced scanning range

0.5 ... 18 m WSU 15 ... 70 m WSU

1 17 m 67 m 2 15.5 m 61 m 3 13 m 51 m 4 11 m 42 m

Tab. 2: Reduction in scanning range when using corner mirrors

Corner mirror

Safety distance Reflection possible

Fig. 8: Multi-sided protection of hazardous areas

too small

Corner mirror

Fig. 9: Two-beam protection with a WSU/WEU 26 system

The use of more than 2 mirrors requires a very accurate alignment.

SICK WSU 26/2 – WEU 26/2

6 Mounting

6.1 Mounting Requirements

The devices should be mounted and connected in accordance with the on-site application conditions and connections, taking account of the following:

The scanning range is based on the width of the area being protected. Bypassing or encircling must be prevented by suitable (mechanical) means. Where one or more WSU/WEU units are used, the height and number of light beams must comply with the applicable regulations. There must be no reflective surfaces in the emitting or receiving beam path. The minimum distance must be maintained.

6 Mounting

6.2 Detecting Reflections

The light beam must not be unintentionally reflected back to the receiver by reflective surfaces. Reflections can be detected as follows:

Entry direction

Central beam

Reflective object (e.g. material container)

Boundary of point-ofoperation

Fig. 10: Incorrect mounting: reflective object in divergent light beam. No detection of the obstacle due to reflection. No protection.

Entry direction

Central beam

Cover the light beam between the sender and receiver fully with an obstacle (100 mm x 100 mm) and slowly move the obstacle from the sender unit to the receiver unit. While this is happening the green LED on the WEU must not light up. If it lights up even just briefly during this check, reflection is occurring. See also 8. Commissioning.

Beam array broken

Reflective object (e.g. material container)

Boundary of point-ofoperation

Fig. 11: Correct mounting, correctly aligned: reflective object outside divergent light beam. No reflection. The obstacle is clearly detected.

a (mm)

SICK WSU 26/2 – WEU 26/2

2500

WSU WEU

2000

1500

1000

500 400

300 200 100

Fig. 12: Distance a as a function of scanning range SR

4°

a (70 m)

4°

a (18 m)

RW (m)

SICK WSU 26/2 – WEU 26/2

7 Electrical Connection

7.1 General Introduction

Depending on type, the WSU/WEU 26/2 photoelectric safety switch is available for a supply voltage of

‡ 24 V DC ‡ 115 V AC or ‡ 230 V AC.

The rating plate gives details.

Before connection, check that the supply voltage and mains frequency on-site are consistent with the specifications on the rating plate.

The cable is fed through the PG connector and connected inside the device, or connected to the equipment plug. The wiring diagram is depicted again on the housing cover of the respective device.

The two system components must be of the same voltage version and the same scanning ranges. Single- or fine-wire conductors up to 1.5 mm

can be connected to

the screwless terminals (to VDE

0607). Stripping length: 11 mm.

The electrical connection of the WSU/WEU must only be made or changed with the power disconnected.

Unscrew the housing cover to connect the WSU/WEU with a PG connector.

Arc-suppression elements are essential under inductive load! Arc-suppression elements must be connected in parallel with the inductance. Connection in parallel with the output contact is not permitted.

Diodes must not be used as arc-suppression elements.

At least two outputs must be connected to the downstream machine controller (Fig. 20/21). Each of the two outputs (NO contacts) must be assigned an electromagnetic switching element.

Guide values for arc-suppression elements

The enclosure rating for the devices can only be guaranteed when the cable is properly clamped in the PG connector and the housing seals fit perfectly. Where long leads are used, the cable cross-sections should be chosen to ensure the

Operating voltage

Contact in WEU

Consumers,

contactor

Operating voltage Order no. R C

V ΩµF 115 ... 230 6 001 224 220 0.22 24 6 001 225 100 2.2

Plastic-encapsulated; connecting wires NYAF 0.5 dia. with cable lugs; mounting with adhesive tape or cable tie.

devices are always supplied with the required voltage (see Technical Data).

Tab. 3: Overview for arc-suppression elements

7.2 Wiring Diagram

SICK WSU 26/2 – WEU 26/2

31011

1/2

PE +24V

Fig. 13: Wiring diagram WSU/WEU for 24 V DC supply, with PG connector

0V 0V

31011

1/2

+24V

1/2

456789

230V/

115 V

Fig. 14: Wiring diagram WSU/WEU for AC supply, with PG connector

Connecting leads max. 1.5 mm

WSU

Test contact (10, 11) Floating U 24 V DC

I 10 mA

Opening time t ≥ 50 ms

WEU

Outputs (4 - 9) Umax. 250 V AC Imax. 2 A per output Imin. 0.02 A per output

230V/ 115 V

SICK WSU 26/2 – WEU 26/2

1/2

PE +24V

1/2

PE +24V

31011

WSU 26/2 -131

231

Coded to

A or

Equipment plug

WSU 26/2 -133 WSU 26/2 -233

Equipment plug

Coded to

E or. 4

Equipment plug

Coded to B or 1

3456789

1/2

PE +24V

3456789

1/2

+24V 0V

3456789

1/2

PE +24V 0V

WEU 26/2 -131

231

Coded to

D or 5

Equipment plug

WEU 26/2 -132

232

Coded to

E or 4

Equipment plug

WEU 26/2 -133

233

Equipment plug

Coded to

E or 4

Fig. 15: Wiring diagram WSU/WEU 26/2 for 24 V DC supply, interchangeable design

SICK WSU 26/2 – WEU 26/2

1/2

230 V/ 115 V

1/2

230 V/ 115 V

31011

WSU 26/2 -121

-221

-111

-211

Coded to

C or 6

Equipment plug

WSU 26/2 -113 WSU 26/2 -213

Coded to

A or

Equipment plug

WSU 26/2 -123

Equipment plug

Coded to G or 2

-223

Coded to F or 3

3456789

1/2

230 V/ 115 V

1/2

3456789

230 V/ 115 V

3456789

1/2

PE 230/

115 V

WEU 26/2 -112

-122

-212

-222

Coded to

F or 3

Equipment plug

WEU 26/2 -113

-213

-123

-223

Coded to

A or

Equipment plug

WEU 26/2 -111

-211

Coded to

G or 2

Equipment plug

WEU 26/2 -121

-221

Equipment plug

Coded to

C or 6

Fig. 16: Wiring diagram WSU/WEU 26/2 for AC supply, interchangeable design

WSU 26/2 -114

+24V/L1 (1/2)

1 2

0V/N (3)

Test (10) Test (11)

3 4 5

(...) Terminals on electronic card (...) Terminals on electronic card

ABC

1 24 V n.c. Test

L 1 (1/2) (10)

2 0V n.c. Test

N (3) (11)

3 n.c. n.c. n.c. 4 n.c. n.c. n.c. 5 n.c. n.c. n.c.

-214

-124

-224

-134

-234

WEU

+24V/L1 (1/2)

0V/N (3)

3 4

S1 (4)

S1 (5)

ABC

1 24 V n.c. n.c.

L 1 (1/2)

2 0V n.c. n.c.

N (3)

3 n.c. n.c. n.c. 4 S 1 Ö 1/2 S 2

(4) (6) (8)

5 S 1 Ö 1/2 S 2

(5) (7) (9)

26/2 -114

Ö1/2 (6)

S2 (8) S2 (9)

Ö1/2 (7)

-214

-124

-224

-134

-234

Fig. 17: Pin assignment WSU/WEU 26/2, AC/DC version with equipment plug (15 + PE)

SICK WSU 26/2 – WEU 26/2

29.5

PG 13.5

For line dia. 6 ... 9 mm

Pay attention to coding!

29,5

29.5

15.2

15,2

55,2

55.2

Plugs and sockets: DIN 43651: 6 + PE with crimp contacts

M 26 x 1.5

M 26x1,5

dia. 28

ø 28

straight

Order no. 6 006 612

Fig. 18: Cable receptacles 6 + PE

7,5

7.5

25,5

22.5

angled

Order no. 6 006 613

For line dia. 4 ... 11 mm

Important: Mark plug and socket unambiguously! The WEU socket must not be connected to the WSU plug

In some cases no longer complies with requirements for clearance and creepage distances (VDE 0160 05/88 and VDE 0110); see selection table.

54.5

Order no. 2 019 076

13.5

29.5

Order no. 2 019 075

29.5

Fig. 19: Cable receptacles 15 + PE

+24V

SICK WSU 26/2 – WEU 26/2

A2PETo

C1 D1 PE C2 D2 PE T3 T4 C3 D3 PE C4 D4 14 24 32

PE T13 T14

X11 X12

WSU WEU

1/2

+24V

Tes t Tes t

+24V

0V PE

1/2

4 8

9 5 3 PE

0 V PE

Fig. 20: WSU/WEU 26/2 with Safety Interface LCU-X

T21 T22

X21 X22

1) x

23 31

SICK WSU 26/2 – WEU 26/2

+24V

Start

WSU

1/2

311

+24V

Y32

Y35

1/2 4 8 6

WEU

3597

A1+ S52 S12 S22 S21 13 23 33 41 Y36

323

12 3

Outside switch cabinet separate line laying to receiver. Terminals 1, 3, 8 and 9 and 4, 5, 6 and 7 respectively in one plastic-sheathed cable. Use PG 21 (order no. 5 305 978) and PG extension (order no. 5 306 052).

Fig. 21: WSU/WEU 26/2 with PNOZ 8 (Pilz); BIA-tested application no. 01131202933

S11 Y1 Y2 A3 14 24 34 42 Y37 A2

SICK WSU 26/2 – WEU 26/2

k 1

k 2

k 3

K 1 K 2 K 3 K 4

k 1

k 2

k 3

k 4

k 1

k 2

k 3

K1 to K4 Contactors or relays with positively-driven contacts

(not supplied) Fu Arc-suppression, essential S Command unit, e.g. pushbutton, key-operated switch etc.

Press button S to start, otherwise red LED on WEU remains lit. x and y Insert in safe machine controller to interrupt the hazardous

movement. For safety reasons, the two contact rows (x and y)

must be inserted separately into the controller (two-channel). z If, in exceptional cases, depending on the risk assessment, the

controller of the power-driven machinery is only of single-channel

design, contact row z can be used.

k 4

k 1

k 3

k 4

k 2

k 4

k 1

k 2

k 3

k 4

Fig. 22: Example of a connection with one WSU/WEU-26 system

SICK WSU 26/2 – WEU 26/2

k 1

k 2

k 3

k 4

k 5

k 6

K 1 K 2 K 3 K 4 K 5 K 6

K1 to K6 Contactors or relays with positively-driven contacts

(not supplied) Fu Arc-suppression, essential S Command unit, e.g. pushbutton, key-operated switch etc.

Press button S to start, otherwise red LED on WEU remains lit. x and y Insert in safe machine controller to interrupt the hazardous

movement. For safety reasons, the two contact rows (x and y)

must be inserted separately into the controller (two-channel). z If, in exceptional cases, depending on the risk assessment, the

controller of the power-driven machinery is only of single-channel

design, contact row z can be used.

k 1

k 3

k 5

k 6

k 2

k 4

k 5

k 6

k 1

k 3

k 5

k 6

k 2

k 4

k 5

k 6

k 1

k 2

k 3

k 4

k 5

Fig. 23: Example of a connection with two WSU/WEU-26 systems

k 6

8 Commissioning

SICK WSU 26/2 – WEU 26/2

8.1 Alignment of WSU and WEU

After checking the electrical connections, loosen the fixing screws on the WSU/WEU and align the devices to each other roughly using the alignment sight. For further alignment keep pressing button S or jumper terminals 10 and 11 on the WSU and switch on the devices. When this is done the LED on the WSU (yellow LED) lights up (Fig. 24). Align the devices to each other so that the green and yellow LEDs on the WEU light up. For optimum alignment, ascertain the limits of the emitting and receiving ranges by swiveling the WSU and WEU horizontally and vertically one after the other. Just before the limit of the optical range the yellow LED on the WEU begins to flash (Fig. 26). Beyond the optical range the red LED on the WEU lights up. Then secure the WSU and WEU respectively in the middle of the resulting ranges. The yellow LED on the WEU must be permanently lit.

8.3 Checking

Incorrect alignment may mean that an obstacle is not detected or that operational safety is not attained

investigate the diversion of the light beam between the WSU and the WEU (reflection may be occurring, see 6.2 Detecting Reflections).

(Fig. 24). The functional safety of the photoelectric safety switch is

A function check of this kind must be carried out

checked by breaking the light beam continually and along its entire length, from just in front of the

‡ daily prior to start of production,

‡ after any change in the WSU/

WEU back to the WSU (surface area 100 mm x 100 mm). While

‡ after any servicing or

this check is being performed, the red LED on the WEU must remain continuously lit. If it does not,

Optical axis

Alignment sight

Fig. 24: Alignment with the aid of the alignment sight

WSU/WEU 26/2

Fixing screw M4 x 10

WEU configuration,

maintenance work on the protective system.

8.2

Alignment of WSU and WEU with Alignment Aid AR 60

For precise alignment of the WSU and WEU the alignment aid AR 60 is available. The alignment aid is clamped in front of the WSU and WEU respectively on a bracket (Fig. 25), which is mounted underneath the optic and held in place by two

Adapter for WSU/WEU 26/2

Alignment aid AR 60

screws. The AR 60 emits a visible laser beam which exactly marks the optical axes of WSU and WEU if they are correctly mounted.

Fig. 25: Laser alignment aid AR 60 and WSU/WEU

Sender

optic

electronic

Receiver

SICK WSU 26/2 – WEU 26/2

9 Maintenance

The front screens of the WSU and WEU should be cleaned at regular intervals, according to the site conditions. The screens must only be cleaned with a clean, soft cloth or with cotton wool. Use plastic cleaner as the cleaning agent.

10 Commissioning

9 Maintenance

Since the WSU/WEU is a protective system, it is recommended that the system be commissioned into operation by an expert. Experts are deemed to be only persons trained in the handling of such safety equipment who are

11 Malfunctions

11.1 Diagnostic Elements

The LEDs on the WSU and WEU indicate the following operating states (Fig. 26):

‡ employees of SICK, ‡ employees of SICK subsidiaries

and representatives abroad,

WSU

yellow

Fig. 26: LEDs of the WSU and WEU

‡ employees of companies who

operate large quantities of SICK safety equipment at their premises, provided they have been trained by SICK and have been assigned by their employers to perform such duties.

WEU

green yellow red

Continuously lit yellow Operating voltage applied (test contact closed) Off yellow No operating voltage applied or test active (For duration of test)

Continuously lit green Light beam of sender unit reaching receiver

yellow Sufficient light received red Light beam broken, briefly during test

yellow + red Interference of another emitter element Flashing yellow Insufficient light received, unit still functioning Off green No operating voltage applied, light beam broken, test performed

yellow Light beam broken, testing performed, no operating voltage applied

red No operating voltage applied, light received from sender

Tab. 4: Functioning of the LEDs

Simple malfunctions can be rectified by referring to the chart below. Before opening up the units clean the housing thoroughly to prevent dirt entering the interior.

SICK WSU 26/2 – WEU 26/2

Do not touch any electrical connections when the unit is open and switched on.

Fault

LED on WSU not lit

LED on WSU lit, none of the three LEDs on the WEU lit

The red LED on the WEU is permanently lit (no light being received)

The yellow LED on the WEU flashes (insufficient light being received)

The yellow and red LEDs on the WEU are permanently lit

Cause

No power supply Break between terminals 10 and 11 (test contact)

No power supply on WEU Break at relay contact Relay defective

Unit out of alignment Front screen dirty

Test input (sender) interrupted Receiver WEU defective Sender WSU not emitting

Sender WSU defective

Units or corner mirrors out of alignment

Front screen of WSU/WEU or corner mirror dirty

Electronics activated:

Interference of another emitter element

Electronic card defective

Testing and remedy

Check voltage Check passage

Check voltage on WEU Replace unit

Re-align WSU and WEU units Clean front screens of WSU and WEU

Check testing Replace unit On WSU briefly switch power off and on again (min. 1 s) Replace unit

Adjust units or corner mirrors to optimum alignment Clean front screen or corner mirror

On WEU briefly switch power off and on again (min. 1 s) WEU must only respond to the corresponding WSU Replace unit

SICK WSU 26/2 – WEU 26/2

12 Technical Data WSU 26/2 / WEU 26/2

Dimensions

Protective field range 0.5 ... 18 m, 15 ... 70 m Number of beams 1 beam Light beam diameter 23 mm

Sender/receiver unit

Supply voltage (Uv) 24 V DC ± 20 %

230 V DC ± 10 % / - 15 % 115 V DC ± 10 % / - 15 %

Ripple Max. 5 % of U Frequency 48 ... 62 Hz with AC version Input, sender Test contact Test time max. 150 ms Min. opening time of NC

contact for test 75 ms Power consumption (typical)

Voltage version 24 V 115 V 230 V Sender unit 4 W 7 W 7 W

Receiver unit 6 W 10 VA 10 VA Synchronization Optical Outputs Relay max. operating frequency 0.2 Hz

(1 operation in 5 s) Switching current (max./min.) 2 A / 0.02 A Switching voltage (max./min.) 250 V AC / 24 V DC Response time ≤ 22 ms Connection cable: PG connector: IP 67

Connection plug: IP 65 Front screen heating As standard

Operating data

Protection class I Enclosure rating IP 65 (connection plug)

IP 67 (PG connector) Safety category Satisfies type 4 requirements

Requirements To pr EN 61496 Part I/Part II Ambient operating

temperature – 25 ... + 55 °C Storage temperature – 25 ... + 70 °C Air humidity 15 ... 95 % Vibrostability 5 g, 10 ... 55 Hz to IEC 68-2-6 Impact resistance 10 g, 16 ms to IEC 68-2-29 Weight Sender unit Approx. 0.9 ... 1.3 kg

Receiver unit Approx. 1.0 ... 1.4 kg

12 Technical Data

13 Dimensional Drawing

SICK WSU 26/2 – WEU 26/2

156

PG13.5

Dimensional Drawing WSU 26/2-xx0 and WEU 26/2-xx0

17.5

128

15.5

116

65 95 96

SICK WSU 26/2 – WEU 26/2

156

128

15.5 65

116

50 mm

approx.

Dimensional Drawing WSU 26/2-xx4 and WEU 26/2-xx4

SICK WSU 26/2 – WEU 26/2

156

128

15.5 65

95 96

116

100

50 mm

approx.

Dimensional Drawing WSU 26/2-xx1 and -xx3 and WEU 26/2-xx1, -xx2 and -xx3

SICK WSU 26/2 – WEU 26/2

6.5

64.5

20°

46.5

39.5

60°

124

149

100

Corner mirror PSK 1 Order number 1 005 229

Mounting bracket Order number 2 007 900

160

177

ø 7

8.5

2.5 10

16.5

M 8x30 SW 13

M 8x45 SW 13

33.5

Bracket for corner mirror PSK 1 Order number 2 009 292

+0.2_

44.5 14

+0.5

190

160 Mirror length

+0,1

Ø 20

+0.5

40.5

Mirror width

105

+0.2

135

156

Corner mirror PNS 105-1 Order number 1 004 076

40.5

8.5

Corner mirror PSK 45 Order number 5 306 053

146.5

96.5

45˚

8.5

69.5

Center of mirror surface

8.5

Mounting set for PSK 1 Order number 2 012 473

50.5

SICK WSU 26/2 – WEU 26/2

119

Snow shield

65.5

12.3

Order number 1 003 619

50.5

65.565

11.8

140

Dust shield Order number 1 003 556

SICK WSU 26/2 – WEU 26/2

14 At a glance: What is new about the WSU/WEU 26/2 in relation to the WSU/WEU 26?

Previously: WSU 26 / WEU 26 Now: WSU 26/2 / WEU 26/2

‡ The optical axis of the WSU/WEU

26/2 is shifted 6 mm toward the device connection.

‡ There are two terminals for

connection of the power supply: terminal 1/2 and terminal 3.

‡ Voltage versions

230 V AC 115 V AC 24 V DC

‡ A new adapter is required for

AR 60.

‡ No fiber-optic cable version is

available.

‡ An additional marking on the side

identifies the middle of the beam.

‡ The scanning ranges have changed:

WSU/WEU 26 WSU/WEU 26/2

0.5 ... 30 m 0.5 ... 18 m 30 ... 60 m 15 ... 70 m

For each range segment there is a sender and a receiver.

‡ The beam diameter has changed:

WSU/WEU 26 WSU/WEU 26/2 33 mm 23 mm

‡ Connector version: the previous

connector no longer complies with requirements for clearance and creepage distances (VDE 0160 05/ 88 and VDE 0110).

‡ New front screen: may only be

cleaned with plastic cleaner.

‡ The power consumption has

increased:

WSU/WEU 26 WSU/WEU 26/2 Version 5 VA / 7 VA 7 VA / 10 VA 115/230 V AC 3 W / 5 W 4 W / 6 W 24 V DC

‡ Response time

WSU/WEU 26: 20 ms WSU/WEU 26/2: 22 ms

Components of the (new) WSU/ WEU 26/2 system cannot be combined with components of the (old) WSU/WEU 26 system. When exchanging in the event of repair please note that the following combinations are not possible:

WSU 26 with WEU 26/2 WSU 26/2 with WEU 26

Exchange in pairs.

15 Selection Table

SICK WSU 26/2 – WEU 26/2

15 Selection Table WSU / WEU

Voltage Scanning Termination Sender unit Receiver unit

range type Type Order number Type Order number

230 V AC 0.5 ... 18 m PG WSU 26/2-110 1 015 615 WEU 26/2-110 1 015 616

Plug WSU 26/2-111 1 015 712 WEU 26/2-111 1 015 713 Plug *) WSU 26/2-113 1 015 715 WEU 26/2-113 1 015 715 Plug *) WEU 26/2-112 1 015 714 Plug 15 + PE*) WSU 26/2-114 1 015 834 WEU 26/2-114 1 015 835

15 ... 70 m PG WSU 26/2-210 1 015 731 WEU 26/2-210 1 015 743

Plug WSU 26/2-211 1 015 733 WEU 26/2-211 1 015 744 Plug *) WSU 26/2-213 1 015 736 WEU 26/2-213 1 015 748 Plug *) WEU 26/2-212 1 015 746 Plug 15 + PE*) WSU 26/2-214 1 015 840 WEU 26/2-214 1 015 841

115 V AC 0.5 ... 18 m PG WSU 26/2-120 1 015 717 WEU 26/2-120 1 015 718

Plug WSU 26/2-121 1 015 719 WEU 26/2-121 1 015 720 Plug *) WSU 26/2-123 1 015 723 WEU 26/2-123 1 015 722 Plug *) WEU 26/2-122 1 015 721 Plug 15 + PE*) WSU 26/2-124 1 015 836 WEU 26/2-124 1 015 837

15 ... 70 m PG WSU 26/2-220 1 015 738 WEU 26/2-220 1 015 749

Plug WSU 26/2-221 1 015 740 WEU 26/2-221 1 015 750 Plug *) WSU 26/2-223 1 015 737 WEU 26/2-223 1 015 505

WEU 26/2-222 1 015 751

Plug 15 + PE*) WSU 26/2-224 1 015 842 WEU 26/2-224 1 015 843

24 V DC 0.5 ... 18 m PG WSU 26/2-130 1 015 724 WEU 26/2-130 1 015 725

15 ... 70 m PG WSU 26/2-230 1 015 745 WEU 26/2-230 1 015 504

*) See electrical wiring diagram

Selection of plug variant, WSU/WEU

Since 1989 VDE 0160 05/88 and VDE 0110 have stipulated doubled clearance and creepage distances. In the following cases the necessary clearance and creepage distances of the 6-PE Hirschmann connecting plug on the WEU are not met:

Plug WSU 26/2-131 1 015 726 WEU 26/2-131 1 015 727 Plug *) WSU 26/2-133 1 015 730 WEU 26/2-133 1 015 729 Plug *) WEU 26/2-132 1 015 728 Plug 15 + PE*) WSU 26/2-134 1 015 838 WEU 26/2-134 1 015 839

Plug WSU 26/2-231 1 015 747 WEU 26/2-231 1 015 753 Plug *) WSU 26/2-233 1 015 739 WEU 26/2-233 1 015 755 Plug *) WEU 26/2-232 1 015 754 Plug 15 + PE*) WSU 26/2-234 1 015 844 WEU 26/2-234 1 015 845

Supply voltage Voltage at WEU Remarks WEU output relays

230 V AC 230 V AC Only in case of separated

circuits/phases (e.g. L1 to L2) 230 V AC 024 V DC –

024 V DC 230 V AC –

In order to meet the VDE requirements for clearance and creepage distances in these cases, the square 15-pin + PE plug must be used.

SICK WSU 26/2 – WEU 26/2

14.1 Conversion List

WSU to be Nex type 26/2 replaced Scanning range 0.5 ... 18 m Scanning range 15 ... 70 m

WSU 26-110 WSU 26/2-110 1 015 615 WSU 26/2-210 1 015 731 WSU 26-111 WSU 26/2-111 1 015 712 WSU 26/2-211 1 015 733 WSU 26-112 WSU 26/2-113 1 015 716 WSU 26/2-213 1 015 736 WSU 26-120 WSU 26/2-120 1 015 717 WSU 26/2-220 1 015 738 WSU 26-121 WSU 26/2-121 1 015 719 WSU 26/2-221 1 015 740 WSU 26-130 WSU 26/2-130 1 015 724 WSU 26/2-230 1 015 745 WSU 26-131 WSU 26/2-131 1 015 726 WSU 26/2-231 1 015 747 WSU 26-132 WSU 26/2-133 1 015 730 WSU 26/2-233 1 015 739 WSU 26-210 WSU 26/2-210 1 015 731 WSU 26-211 WSU 26/2-211 1 015 733 WSU 26-212 WSU 26/2-213 1 015 736 WSU 26-220 WSU 26/2-220 1 015 738 WSU 26-221 WSU 26/2-221 1 015 740 WSU 26-230 WSU 26/2-230 1 015 745 WSU 26-231 WSU 26/2-231 1 015 747 WSU 26-232 WSU 26/2-233 1 015 739

old

WEU to be New type 26/2 replaced Scanning range 0.5 ... 18 m Scanning range 15 ... 70 m

WEU 26-710 WEU 26/2-110 1 015 616 WEU 26/2-210 1 015 743 WEU 26-712 WEU 26/2-112 1 015 713 WEU 26/2-211 1 015 744 WEU 26-713 WEU 26/2-113 1 015 715 WEU 26/2-213 1 015 748 WEU 26-720 WEU 26/2-120 1 015 718 WEU 26/2-220 1 015 749 WEU 26-730 WEU 26/2-130 1 015 725 WEU 26/2-230 1 015 504 WEU 26-731 WEU 26/2-131 1 015 727 WEU 26/2-231 1 015 753 WEU 26-732 WEU 26/2-132 1 015 728 WEU 26/2-232 1 015 754 WEU 26-733 WSU 26/2-133 1 015 729 WEU 26/2-233 1 015 755

old

16 Selection Table, Accessories

Description Order number

Alignment aid AR 60, complete 1 015 741 Adapter for alignment aid AR 60 4 031 156 Mounting bracket for WSU/WEU 2 007 900 Corner mirror PSK 1, for scanning range 0.5 ... 18 m 1 005 229 Mounting set for PSK 1 2 012 473 Hinged bracket for corner mirror PSK 1 (x 1) 2 009 292 Corner mirror PNS 105-1, for scanning range 15 ... 70 m 1 004 076 Corner mirror PSK 45 5 306 053 Cable receptacle, straight, 6 + PE (plastic) 6 006 612 Cable receptacle, angled, 6 + PE (plastic) 6 006 613 Cable receptacle, 15 + PE, lateral cable outlet, PG 16 2 019 076 Cable receptacle, 15 + PE, straight cable outlet, PG 13.5 2 019 075

Arc-suppression element 0.22 µF + 220 Ω (115 ... 230 V) 6 001 224 Arc-suppression element 2.2 µF + 100 Ω (24 V) 6 001 225

Switching amplifier LCU-X 24 V DC 1 013 410

Switching amplifier (PILZ) Switching amplifier PST 1 24 V DC 6 010 808

230 V AC 6 010 809

SICK WSU 26/2 – WEU 26/2

Switching amplifier PST 3 24 V DC 6 008 424

Switching amplifier PNOZ 8 24 V DC 6 010 810

PG cable gland PG 21 5 305 978 for use of 2 cables with PNOZ 8

PG extension PG 13.5 to PG 21 5 306 052 for use of 2 cables with PNOZ 8

230 V AC 6 008 423

230 V AC 6 010 811

SICK AG · Safety Systems · P.O. Box 310 · D-79177 Waldkirch

Phone +49 76 81/2 02-0 · Fax +49 76 81/2 02-38 15 · http://www.sick.de

8 008 692/9-12-99 · KF · KF · Printed in Germany (1299)

Subject to change without prior notice

E 2.02

Your contacts:

Australia

Phone +61/3 94 97 4100

008/33 4802 – toll free

Fax +61/3 94 9711 87

Austria

Phone +43/2 23 66 2288-0 Fax +43/2 23 6622 88-5

Belgium/Luxembourg

Phone +32/24 66 55 66 Fax +32/24 66 6026

Brazil

Phone +55 11/55 61 2683 Fax +5511/5354153

China/Hong Kong

Phone +8 52/27 63 6966 Fax +8 52/27 6363 11

Czech Republik

Phone +42 /02 578 10561 Fax +42 /02 57810 559

Denmark

Phone +45/45 82 64 00 Fax +45/45 82 6401

Finland

Phone +3 58/9-728 85 00 Fax +3 58/9-72 88 50 55

France

Phone +33/1-64 62 35 00 Fax +33/1-64 62 3577

Germany

Phone +49 7681/2 02-0 Fax +49 76 81/2 02-3815

Great Britain

Phone +44/17 27-83 11 21 Fax +44/17 27-85 6767

Italy

Phone +3 90/2-92 14 20 62 Fax +3 90/2-92 14 20 67

Japan

Phone +8 13/33 58-13 41 Fax +8 13/33 58-05 86

Netherlands

Phone +31/30 229 25 44 Fax +31/30 229 39 94

Norway

Phone +47/67 56 75 00 Fax +47/67 56 6610

Poland

Phone +48/2 26 44 8345 Fax +48/2 26 4483 42

Singapore

Phone +65/7 44 37 32 Fax +65/8 41 7747

Spain

Phone +34/93 4 80 3100 Fax +34/93 4 7344 69

Sweden

Phone +46/8-6 80 64 50 Fax +46/8-7 10 1875

Switzerland

Phone +41/4 16 19 2939 Fax +41/4 16 1929 21

Taiwan

Phone +88 62/23 65 6292 Fax +88 62/23 6873 97

USA

Phone +16 12/9 41-67 80 Fax +16 12/9 41-9287

Representatives and agencies in all major industrial nations.

SICK WEU 26/2, WSU 26/2 Technical Description

Specifications and Main Features

Frequently Asked Questions

User Manual