SICK WSU 26/2 Technical Description

Photoelectric safety switch

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Technical description (35 pages)

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W S U 2 6 / 2 – W E U 2 6 / 2

P h o t o e l e c t r i c S a f e t y S w i t c h

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Page 1 W S U 2 6 / 2 – W E U 2 6 / 2 P h o t o e l e c t r i c S a f e t y S w i t c h...
Page 2 Technical Description WSU 26/2 – WEU 26/2 Photoelectric Safety Switch The information contained in this document may be revised or supplemented without prior notice. 8 008 692/23-07-01 © SICK AG • Industrial Safety Systems • Germany • All rights reserved...
Page 3: Table Of Contents
At a glance: Comparison of old versus new devices ......42 Selection Table ......................43 11.1 Conversion list ......................44 Accessories Selection Table ................45 Checklist .......................... 46 8 008 692/23-07-01 © SICK AG • Industrial Safety Systems • Germany • All rights reserved...
Page 5: Document Information
Electrical installation Commissioning Maintenance Ordering Target group The target group of this document is those who install, commission and use the WSU/WEU photoelectric safety switch. 8 008 692/23-07-01 © SICK AG • Industrial Safety Systems • Germany • All rights reserved...
Page 6: Scope Of Information
A warning indicates actual or potential hazards. This is to reduce the risk WARNING of accidents. Always read warning notices carefully and follow them closely. 8 008 692/23-07-01 © SICK AG • Industrial Safety Systems • Germany • All rights reserved...
Page 7: Safety
Before commissioning, the mounting and connection must be inspected by the operator’s responsible staff member, as is required by the standards and directives of the specific country. 8 008 692/23-07-01 © SICK AG • Industrial Safety Systems • Germany • All rights reserved...
Page 8: Application Areas
The following key points are important for correct operation (Fig. 2): Beam diameter Lichtstrahldurchmesser 23 mm 23 mm 0.5 to 18 m 15 to 70 m Fig. 2: System construction of the WSU/WEU 26/2 8 008 692/23-07-01 © SICK AG • Industrial Safety Systems • Germany • All rights reserved...
Page 9: Intended Use Of The Device
SICK AG will not accept back unusable systems or systems beyond repair. When dismantling and disposing of components, provisions relating to occupational safety, the environment and disposal should be observed. 8 008 692/23-07-01 © SICK AG • Industrial Safety Systems • Germany • All rights reserved...
Page 10: Product Description
(see 8 Diagnostic Elements). Their display, however, is not safety related. The diagnostic lights also serve as error diagnostics, see 8, Diagnostic Elements. 8 008 692/23-07-01 © SICK AG • Industrial Safety Systems • Germany • All rights reserved...
Page 11: Mounting
The machine stopping time must be determined by repeated measure- ments under practical conditions. 1.6 m/s is the recommended (by EN 999) approach speed. The safety distance is calculated as follows: 8 008 692/23-07-01 © SICK AG • Industrial Safety Systems • Germany • All rights reserved...
Page 12 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. 8 008 692/23-07-01 © SICK AG • Industrial Safety Systems • Germany • All rights reserved...
Page 13: Distance To Reflective Surfaces
(e. g. material container) Boundary of point-of- operation Fig. 6: Correct mounting, correctly aligned: reflective object outside divergent light beam. No reflection. The obstacle is clearly detected. 8 008 692/23-07-01 © SICK AG • Industrial Safety Systems • Germany • All rights reserved...
Page 15: Multiple Safeguarding
WSU/WEU (Fig. 8). Correct Wrong Correct Corner mirror Wrong Corner mirror Fig. 8: Safeguarding a hazardous area with WSU/WEU 8 008 692/23-07-01 © SICK AG • Industrial Safety Systems • Germany • All rights reserved...
Page 16: Mutual Interference
Fig. 10 shows examples. The devices should be mounted such that the opposing device can be aligned using the alignment sight. 8 008 692/23-07-01 © SICK AG • Industrial Safety Systems • Germany • All rights reserved...
Page 17 Note Do not use with plug version WSU/WEU 26/2-xx4 Mounting bracket Part No. 2 007 900 Fig. 10: Mounting options using a mounting bracket 8 008 692/23-07-01 © SICK AG • Industrial Safety Systems • Germany • All rights reserved...
Page 18: Corner Mirrors
Corner mirror distance too Reflection small possible Umlenkspiegel Corner mirror Fig. 11: Multi-sided protection of Fig. 12: Two-beam protection with a hazardous areas WSU/WEU-26-system 8 008 692/23-07-01 © SICK AG • Industrial Safety Systems • Germany • All rights reserved...
Page 19: Electrical Installation
At least two outputs must be connected to the control unit of the machine being protected (Figs. 22/23). An electromagnetic contact WARNING element (relay) must be connected to each of the two outputs (normally-open contacts). 8 008 692/23-07-01 © SICK AG • Industrial Safety Systems • Germany • All rights reserved...
Page 20: Test Instructions
Connections that are made in parallel to the output contact are not WARNING permissible, and may result in unsafe operation. Diodes must not be used as spark-suppression elements. 8 008 692/23-07-01 © SICK AG • Industrial Safety Systems • Germany • All rights reserved...
Page 21: Short-Circuit Monitoring
Overvoltage protection (fuse) A fuse must be provided for the control circuit. The fuse rating must correspond to the maximum current drawn by the output relay. 8 008 692/23-07-01 © SICK AG • Industrial Safety Systems • Germany • All rights reserved...
Page 22: Wiring Diagram
Fig. 15: Wiring diagram WSU/WEU for 24 V DC supply, with PG connector PE L1 N L 1 N Fig. 16: Wiring diagram WSU/WEU for AC supply, with PG connector 8 008 692/23-07-01 © SICK AG • Industrial Safety Systems • Germany • All rights reserved...
Page 23 E or 4 E bzw. 4 Gerätestecker Equipment plug PE +24V 0V Fig. 17: Wiring diagram WSU/WEU for 24 V DC supply, interchangeable design 8 008 692/23-07-01 © SICK AG • Industrial Safety Systems • Germany • All rights reserved...
Page 24 115 V Coded to Codiert auf C or 6 C bzw. 6 Equipment plug Gerätestecker Fig. 18: Wiring diagram WSU/WEU for AC supply, interchangeable design 8 008 692/23-07-01 © SICK AG • Industrial Safety Systems • Germany • All rights reserved...
Page 25 Ö 1/2 n.c. n.c. n.c. Ö 1/2 n.c. n.c. n.c. Fig. 19: Pin assignment WSU/WEU 26/2, AC/DC version with equipment plug 15 P + E 8 008 692/23-07-01 © SICK AG • Industrial Safety Systems • Germany • All rights reserved...
Page 26 PG 13.5 PG 13,5 PG 13.5 PG 13,5 29,5 29.5 29.5 29,5 Part no. 2 019 075 Fig. 21: Cable receptacles 15 P + PE 8 008 692/23-07-01 © SICK AG • Industrial Safety Systems • Germany • All rights reserved...
Page 27 If, in exceptional cases, depending on the risk assessment, the controller of the power-driven machinery is only of a single-channel design, contact row z can be used Fig. 22: WSU/WEU 26/2 with LCU-X safety interface 8 008 692/23-07-01 © SICK AG • Industrial Safety Systems • Germany • All rights reserved...
Page 28 An opened test contact (10 - 11 on WSU) ensures that the sender does not emit and the receiver is de-activated. Fig. 23: Example connection with a single WSU/WEU-26/2 system 8 008 692/23-07-01 © SICK AG • Industrial Safety Systems • Germany • All rights reserved...
Page 29 An opened test contact (10 - 11 on WSU) ensures that the sender does not emit and the receiver is de-activated. Fig. 24: Example connection with two WSU/WEU-26/2 systems 8 008 692/23-07-01 © SICK AG • Industrial Safety Systems • Germany • All rights reserved...
Page 30: Alignment Of Wsu And Weu
LED on the WEU begins to flash. Then fix the sender and receiver units in the middle of the determined optical range. The yellow LED on the WEU must be permanently lit. Note 8 008 692/23-07-01 © SICK AG • Industrial Safety Systems • Germany • All rights reserved...
Page 31: Alignment Of Wsu And Weu With Alignment Aid Ar 60
Fig. 27: Laser alignment aid AR 60 and WSU/WEU Note Incorrect alignment may mean that an obstacle is not detected or that operational safety is not achieved (Fig. 25). 8 008 692/23-07-01 © SICK AG • Industrial Safety Systems • Germany • All rights reserved...
Page 33: Daily Testing Of The Safety Module By Competent Personnel
If the green or yellow diodes illuminate on the WEU, then no more work may be done using the machinery. It is recommended in this case to WARNING check the system as specified in 6.1 Pre-commissioning tests. 8 008 692/23-07-01 © SICK AG • Industrial Safety Systems • Germany • All rights reserved...
Page 34: Maintenance
If the module has to be opened due to faulty operation, the housing must be cleaned thoroughly before opening to prevent dirt ingress. Switch the power off before doing this. 8 008 692/23-07-01 © SICK AG • Industrial Safety Systems • Germany • All rights reserved...
Page 35: Diagnostic Elements
Spurious transmitters WEU may only respond to WSU allocated to it Defective electronics card Exchange device LED off LED illuminated LED flashing LED no influence 8 008 692/23-07-01 © SICK AG • Industrial Safety Systems • Germany • All rights reserved...
Page 36: Technical Data
AC at 2 A current 50 x 10 Switch-on time Normally-open contacts 10 ms Normally-closed contacts 9 ms Reference point for measured values: equipment plug or terminals 8 008 692/23-07-01 © SICK AG • Industrial Safety Systems • Germany • All rights reserved...
Page 37 ) In conformity with EN 60 204, external voltage supply for the devices must be capable of sustaining a short power interruption of 20 ms. Suitable power supplies can be obtained from SICK as accessories (Siemens Series 6 EP 1).
Page 38: Dimensional Drawings
PG 13.5 Fig. 28: Dimensional Drawing WSU 26/2-xx0 and WEU 26/2-xx0 M6 x 8 15.5 15,5 Fig. 29: Dimensional Drawing WSU 26/2-xx4 and WEU 26/2-xx4 8 008 692/23-07-01 © SICK AG • Industrial Safety Systems • Germany • All rights reserved...
Page 39 WSU 26/2 – WEU 26/2 Photoelectric Safety Switch M6 x 8 15,5 Fig. 30: Dimensional Drawing WSU 26/2-xx1 and -xx3 and WEU 26/2 -xx1, -xx2 and -xx3 8 008 692/23-07-01 © SICK AG • Industrial Safety Systems • Germany • All rights reserved...
Page 40 Corner mirror PSK 45 Mounting set for PSK 1 Part no. 5 306 053 Part no. 2 012 473 Fig. 31: Dimensional drawing accessories 8 008 692/23-07-01 © SICK AG • Industrial Safety Systems • Germany • All rights reserved...
Page 41 110 - 220 V Part no. 6 001 224 Spark-suppression element 48 V Part no. 6 001 225 Fig. 33: Dimensional drawing spark-suppression element 8 008 692/23-07-01 © SICK AG • Industrial Safety Systems • Germany • All rights reserved...
Page 42: At A Glance: Comparison Of Old Versus New Devices
0.5 to 30 0.5 to 18 30 to 60 15 to 70 Beam diameter Power consumption 115/230 V AC 5 /7 7/10 24 V DC 8 008 692/23-07-01 © SICK AG • Industrial Safety Systems • Germany • All rights reserved...
Page 43: Selection Table
In order to meet the VDE requirements for clearance and creepage distances in theses cases, the square 15-pin + PE plug must be used. 8 008 692/23-07-01 © SICK AG • Industrial Safety Systems • Germany • All rights reserved...
Page 44: Conversion List
WEU 26-732 WEU 26/2-132 1 015 728 WEU 26/2-232 1 015 754 WEU 26-733 WEU 26/2-133 1 015 729 WEU 26/2-233 1 015 755 8 008 692/23-07-01 © SICK AG • Industrial Safety Systems • Germany • All rights reserved...
Page 45: Accessories Selection Table
PG extension PG 13.5 to PG 21 5 306 052 for use of 2 cables with PNOZ 8 Dust shield 1 003 556 Snow shield 1 003 619 8 008 692/23-07-01 © SICK AG • Industrial Safety Systems • Germany • All rights reserved...
Page 46: Checklist
Is the Daily Check Requirement sign positioned in a place visible to the operator? This checklist does not replace the initial commissioning of regular inspections by qualified personnel. 8 008 692/23-07-01 © SICK AG • Industrial Safety Systems • Germany • All rights reserved...
Page 48 Representatives and agencies in all major industrial nations. SICK AG · Industrial Safety Systems · P.O. Box 310 · 79177 Waldkirch · Deutschland Phone +49 76 81 2 02 0 · Fax +49 76 81 2 02 38 15 · www.sick.de...

This manual is also suitable for:

Weu 26/2

SICK WSU 26/2 Technical Description

1 Document Information

2 Safety

3 Product Description

4 Mounting

5 Electrical Installation

6 Test Instructions

7 Maintenance

8 Diagnostic Elements

9 Technical Data

10 At a Glance: Comparison of Old Versus New Devices

11 Selection Table

12 Accessories Selection Table

13 Checklist

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