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BWS-T2 Series

Instructions manual

4

EN 811: Oktober 1992

Safety of machinery - Safety distances to prevent danger zones being
reached

by the lower limbs

EN 999: Januar 1995

Safety of machinery - The positioning of protective equipment in respect

of approach of parts of the human body

EN 954 Part 1: März 1997

Safety of machinery; Safety related parts of control systems

- General principles for design

EN 60204 Part 1 Safety of machinery, electrical equipment of
machines - General requirements

Draft prEN 1050: Aprl 1996

Safety of machinery; risk assesment

FINAL DRAFT IEC 61496-1/Ed. 1.0: Safety of machinery - electro -
sensitive equipment,

Part 1: General requirements and tests.

Documents 44/206/FDIS and 44/206A/FDIS: 1997-03-28

FINAL DRAFT IEC 61496-2/Ed. 1.0: Safety of machinery - electro -
sensitive equipment,

Part 2: Particular requirements for equipment using active
opto-electronic

protective

devices.

Documents 44/208/FDIS and 44/206A/FDIS: 1997-0530

The BWS-T2 can be used in conjunction with our line of photoelectric
sensors as shown in the Technical Specifications.

The BWS-T2 has been designed so that one (1) or two (2) Emitter-Receiver
pairs can be connected to it.

The operating voltage is: 24VDC

±

10%.

The status of the system is indicated by 3 visible LEDs:

•

FREE

green

•

ALARM

red

•

TEST

yellow

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Summary of Contents for BWS-T2 Series

Page 1: ...DATASENSOR BWS T2 SERIES Multiray safety barrier level 2 1 2 pairs of photocells INSTRUCTION MANUAL ...

Page 2: ...ity that the product s BWS T2 SAFETY CONTROLLER TYPE 2 to which this declaration relates in conformity with the following standard s or other normative document s CEI EN 55022 JUNE 1997 LIMITS AND METHODS OF MEASUREMENTS OF RADIO DISTURBANCE OF INFORMATION TECHNOLOGY EQUIPMENT CEI EN 61000 4 2 SEPTEMBER 1996 ELECTROMAGNETIC COMPATIBILITY EMC PART 4 TESTING AND MEASUREMENT TECHNIQUES SECTION 2 ELEC...

Page 3: ...NSORS 10 2 4 SAFETY DISTANCE 11 2 4 1 PROTECTION OF DANGER ZONES WITH BWS T2 FOR PROTECTION OF FINGERS AND HANDS 11 2 4 2 PROTECTION OF ACCESS WITH BWS T2 1 OR MORE BEAMS FOR ARM AND BODY PROTECTION 12 2 5 UNWANTED BEAM REFLECTIONS 12 2 6 PHOTOELECTRIC SENSOR INSTALLATION 14 2 7 ALIGNMENT OF THE SENSORS 15 3 ELECTRICAL CONNECTIONS 16 4 TECHNICAL DATA 21 ...

Page 4: ...BWS T2 Series Instructions manual 1 GENERAL VIEW Figure A ...

Page 5: ...sectors We inform that eventually other normatives and rules of local bodies for safety at work have to be respected Cold treatment of metals prEN692 Mechanic presses prEN693 Hydraulic presses Machinery for plastics and rubber prEN201 Injection presses moulding maschinery prEN289 Shape and moulding presses prEN1114 Rail and extrouding presses prEN1417 Equipment for mixing with 2 cylinders prEN422 ...

Page 6: ...hinery with movable rolls prEN1035 Machinery with movable slats prEN931 Machinery for scratching grinding polishing folding and nailing Ohter machinery prEN11553 Safety of Laser machinery for treating materials EN775 Safety of handling automation prEN1525 Driverless transport systems and their systems Further normatives to be applied EN 292 Part 1 November 1991 Safety of machinery Basic concepts g...

Page 7: ...assesment FINAL DRAFT IEC 61496 1 Ed 1 0 Safety of machinery electro sensitive equipment Part 1 General requirements and tests Documents 44 206 FDIS and 44 206A FDIS 1997 03 28 FINAL DRAFT IEC 61496 2 Ed 1 0 Safety of machinery electro sensitive equipment Part 2 Particular requirements for equipment using active opto electronic protective devices Documents 44 208 FDIS and 44 206A FDIS 1997 0530 Th...

Page 8: ...ions START INTERLOCK A start interlock is a means for preventing automatic starting after the BWS T2 is switched on INITIAL TEST A test which is performed via the start switch after the BWS T2 has been powered in order to test the complete safety related control system before the first operation is initiated RESTART INTERLOCK A means for preventing automatic re starting of a machine after the opti...

Page 9: ...e BWS T2 BWS T2 OPERATION Start Activated Failure Blocked state Interrupt Light Beam Test Power on Output Contact Open Output Contact Closed Yes Yes Yes Failure Blocked state Yes No No No No No Output Contact Open Yes Initial Test Cycle Test Q Q Q Q R R R R S S S S T T T T U U U U V V V V Output Contact Open Figure 1 ...

Page 10: ...omatic re activation and force the operator to re initiate with the start switch U If a fault is detected after the start switch is released the yellow TEST LED goes off and the red ALARM LED lights up the output contacts remain open preventing machine start up V During the active operating mode the CYCLE TEST can be performed by means of 2 N C contacts Test 1 and Test 2 see figure 2 This procedur...

Page 11: ...ure 2 When the Test 1 contact opens the test procedure begins When the Test 2 contact opens and closes again the test procedure ends This type of connection allows to detect short circuits at the test cables b CYCLE TEST procedure using 1 N C contact 1 2 3 4 TEST Figure 3 When the Test contact opens the test procedure begins when it closes the test procedure ends ...

Page 12: ...e 4 2 2 START SWITCH The external start switch which allows the enabling of the active operating mode must be installed in such a way that an unobstructed view of the danger area is provided IT MUST NOT BE POSSIBLE TO ACTIVATE THE START SWITCH FROM INSIDE THE DANGER AREA By passing the start switch in order to eliminate the START INTERLOCK and the RESTART INTERLOCK functions is not allowed Therefo...

Page 13: ...to be inside of the danger area behind the safety barrier This must be detected by the safety barrier The electrical connection from the BWS T2 box to the sensors is done via shielded cables The possible lengths are listed in the sensor datasheets If using sensors with connectors be sure that your cable is shielded 2 4 SAFETY DISTANCE SD The photoelectric sensors must be mounted at a safety distan...

Page 14: ...s the protecting area without a guaranteed detection d Detection capabillity see table characteristics of photocells Fingerresolution 14mm handresolution 40mm armresolution 70mm H Vertical position of the protecting area above the floor 2 4 1 Protection of danger zones with BWS T2 for protection of fingers and hands Condition 14mm d 40mm C 0 For 100mm S 500mm is valid S 2000 T C For S 500mm is val...

Page 15: ...rion No limbs passing below the lowest beam No limbs passing below the highest beam No limbs passing between 2 beams No passage between 2 beams Highest beam 900mm lowest beam 300mm 2 5 UNWANTED BEAM REFLECTIONS Specular reflections from shiny surfaces in proximity or within the beam envelope cone can reflect light thus affecting the ability to detect an intrusion into the guarded area The minimum ...

Page 16: ... 8 D 8 INCORRECT INSTALLATION Figure 6a 8 8 x D CORRECT INSTALLATION Figure 6b 1 2 5 6 3 4 7 8 D 30 X 10 20 cm m reflecting surface X D S5 or S10 D X 0 5 1 0 10 20 30 40 50 0 6 0 7 0 8 0 9 m m reflecting surface D X S30 Figure 7a Figure 7b ...

Page 17: ... BWS T2 care must be taken to position these components in such a way as not to interfere with each other including with the help of a mirror see figure 8b and 8c The layouts in figures 8a 8d are bad examples NOT to follow because they are unreliable E E R R Figure 8a E R R E Figure 8d E E R R mirror Figure 8b E R E R mirror Figure 8c ...

Page 18: ...o bridge the start switch from terminal 19 to terminal 20 Using the Receiver output LED of the photoelectric sensor s you can align the light barrier If the sensors are correctly positioned the yellow TEST LED lights up If beam 1 or 2 is interrupted the ALARM LED at the BWS T2 lights up and the TEST LED turns off When the alignment is completed disconnect the bridge between Terminal 19 and Termina...

Page 19: ...ND 18 Earth GND 17 See the individual diagrams figures 10 13 for wiring details One 1 or two 2 emitter receiver pair s can be connected to the BWS T2 If using only one Emitter Receiver pair the cables of the Emitter must be connected to the EMITTER 1 terminals and the cables of the Receiver must be connected to the RECEIVER 2 terminals The EMITTER 2 and RECEIVER 1 terminals remain free CAUTION Sup...

Page 20: ...er tool EL CONTROL CABINET VOLTAGE SUPPLY 24 V 10 EMITTER RECEIVER max 220 VAC S H I E L D FUSE TEST1 TEST2 L1 N 30 29 28 27 26 17 18 19 20 21 23 24 25 22 16 1 2 3 4 5 6 7 8 9 10 11 13 12 15 14 O T 1 U O T 2 U SB BW S T2 Figure 10 One Emitter Receiver pair ...

Page 21: ...EMITTER RECEIVER max 220 VAC FUSE TEST1 TEST2 15 1 2 3 4 5 6 7 8 9 10 11 13 12 14 START L1 N S H I E L D O T 1 U O T 2 U User tool User tool SB BW S T2 Figure 11 One Emitter Receiver pair If only one User Tool is used the output contacts can be tied together NOTE Be sure that L1 is switched by the 2 output contacts and not N ...

Page 22: ... T2 Figure 12 Two Emitter Receiver pairs When operating with 2 E R pairs the wiring configuration shown in figure 12 must be respected It must be made certain that EMITTER 1 directs its beam only to RECEIVER 1 and EMITTER 2 directs its beam only to RECEIVER 2 CAUTION Make sure that EMITTER 1 never directs to RECEIVER 2 To satisfy this demand verify that the BWS T2 switches from GREEN to RED status...

Page 23: ...ts of the auxiliary power operated switches H1 H2 are used to wire directly to the machine control itself The N C contacts of H1 H2 insure that in case of a defective switch the machine will not restart H1 H2 VOLTAGE SUPPLY 24 V 10 30 29 28 27 26 17 18 19 20 21 23 24 25 22 16 max 220 VAC FUSE TEST1 TEST2 15 1 2 3 4 5 6 7 8 9 10 11 13 12 14 S H I E L D O T 1 U O T 2 U S5 5 G8 60 EMITTER S5 5 F8 90 ...

Page 24: ...0000 ops 220 V AC 2 A AC load life 500000 ops 30 V DC 2 A DC Fuse Rating 60 of Imax Input Signals Start N O contact contact close time 40 ms One way wire length 10 m Test 1 2 N C contact open time 40 ms One way wire length 10 m Reaction Time 20 ms Initial Test Time 150 ms contact close time Cycle Test Time 150 ms test contact time Sensing Distance and Background Suppression Depends on type of Emit...

Page 25: ... G8 62 ST2 S10 5 G8 60 ST2 S10 5 G8 62 ST2 S30 5 G50 1 ST2 S30 5 G50 2 ST2 Receiver Light pulse PNP output S5 5 F8 90 ST2 S5 5 F8 92 ST2 S10 5 F8 90 ST2 S10 5 F8 92 ST2 S30 5 F50 1 ST2 S30 5 F50 2P ST2 select light pulse Max sensing distance 8 m 50 m Min object class 15 mm 20 mm Protection class IP67 Length of the shielded cable 30m ...

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