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LS4 SAFETY LIGHT CURTAIN
SUMMARY
INTRODUCTION .......................................................................................................................................... 3
PRINCIPLE OF OPERATION ..................................................................................................................... 4
INSTALLATION . ........................................................................................................................................... 5
Positioning . ............................................................................................................................................................. 6
Master/Slave Positioning .................................................................................................................................. 7
Calculation of safety distance . .......................................................................................................................... 8
Multiple systems . .................................................................................................................................................. 9
Use of deflecting mirrors ................................................................................................................................. 1 0
Distance from reflective surfaces ................................................................................................................. 1 1
Mechanical assembly and optical alignment ............................................................................................ 1 2
Vertical positioning of the light curtain . ..................................................................................................... 1 3
Models with 14, 20mm resolution .............................................................................................................................. 1 3
Models with 30, 40mm resolution .............................................................................................................................. 1 3
Models with 50, 90mm resolution .............................................................................................................................. 1 3
Multibeam Models .............................................................................................................................................................. 1 4
Horizontal positioning of the light curtain ................................................................................................ 1 4
Electrical connections . ...................................................................................................................................... 1 5
Layout of the connectors on MASTER/SLAVE light curtain . ............................................................................ 1 5
Emitter connections .......................................................................................................................................................... 1 6
Receiver connections ........................................................................................................................................................ 1 7
Warnings regarding connection cables . .................................................................................................................... 1 8
Automatic operation . ......................................................................................................................................................... 1 9
Manual operation . ............................................................................................................................................................... 1 9
Connection of external contactors K1 and K2 . ....................................................................................................... 2 0
Examples of connection with M.D. safety modules .............................................................................................. 2 1
OPERATION AND TECHNICAL DATA . ................................................................................................ 24
Light signals ......................................................................................................................................................... 2 4
Emitter light signals . .......................................................................................................................................................... 2 4
Receiver light signals . ........................................................................................................................................................ 2 4
TEST function . ...................................................................................................................................................... 2 5
Status of the outputs . ......................................................................................................................................... 2 5
Technical specifications . .................................................................................................................................. 2 6
Dimensions . .......................................................................................................................................................... 3 1
CHECKOUTS AND MAINTENANCE ...................................................................................................... 33
Functional checks . .............................................................................................................................................. 3 3
Troubleshooting ................................................................................................................................................. 3 4
Accessories/Spares . ........................................................................................................................................... 3 6
GUARANTEE .............................................................................................................................................. 37
CAT8ELS1251403 • 26/06/2018
LS4 SAFETY LIGHT CURTAIN
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Page 1: Table Of Contents
LS4 SAFETY LIGHT CURTAIN LS4 SAFETY LIGHT CURTAIN SUMMARY INTRODUCTION ............................ 3 PRINCIPLE OF OPERATION ........................ 4 INSTALLATION ............................ 5 Positioning ................................6 Master/Slave Positioning ..........................7 Calculation of safety distance ........................... 8 Multiple systems ..............................9 Use of deflecting mirrors .......................... 1 0 Distance from reflective surfaces ......................... 1 1 Mechanical assembly and optical alignment .................... 1 2 Vertical positioning of the light curtain ...................... 1 3 Models with 14, 20mm resolution .......................... 1 3... - Page 2 LS4 SAFETY LIGHT CURTAIN ABBREVIATIONS AND SYMBOLS USED IN THIS MANUAL FE = Functional earth (earth connection) M/S = Master/Slave System OSSD = Output Signal Switching Device = Light curtain’s solid state safety outputs TX = Safety light curtain emitter.
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Page 3: Introduction
LS4 SAFETY LIGHT CURTAIN INTRODUCTION The LS4 light curtain is an optoelectronic safety device belonging to the category of Type 4 electro- sensitive protective equipment for the protection of personnel exposed to risks inherent in the use hazardous machines plants,... -
Page 4: Principle Of Operation
• 50mm and 90mm (protected heights from 310mm to 2260mm): PROTECTION OF THE LIMBS. The LS4 is also available in a Multibeam version with a distance between the mirrors of: • 500mm (2 beams), 400mm (3 beams), 300mm (4 beams). -
Page 5: Installation
INSTALLATION Before installing the LS4 safety system, check all the conditions listed below: The level of protection of LS4 (Type 4, SIL3, SILCL3 PLe) must be compatible with the level of danger of the system to be protected. The safety system is used only as a stopping device and not to control the machine. -
Page 6: Positioning
LS4 SAFETY LIGHT CURTAIN Positioning The Emitter LS4E and the Receiver LS4R must be positioned so that it is impossible to access the dangerous area from above, from below and from the sides without intercepting one of the beams. Useful indications for correct positioning of the light curtain are provided in the figure below. -
Page 7: Master/Slave Positioning
LS4 SAFETY LIGHT CURTAIN Master/Slave Positioning In addition to standard models (that can be positioned either horizontally or vertically), LS4 can be purchased in a MASTER/SLAVE configuration. This configuration comprises two (or three) pairs of light curtains in which the two (or three) Emitters and the two (or three) Receivers are connected in series. -
Page 8: Calculation Of Safety Distance
LS4 SAFETY LIGHT CURTAIN Calculation of safety distance The light curtain must be positioned at a distance equal to or greater than the minimum safety distance S so that the dangerous point can be reached only after stopping the dangerous movement of the machine (Figure 5). -
Page 9: Multiple Systems
LS4 SAFETY LIGHT CURTAIN Multiple systems When several LS4 are used, precautions must be taken to prevent optical interference between these: position the elements so that the beam of the Emitter of one system is received only by its respective Receiver. -
Page 10: Use Of Deflecting Mirrors
LS4 SAFETY LIGHT CURTAIN Use of deflecting mirrors For protection or control of areas accessible from several sides, one or more deflecting mirrors can be used in addition to the Emitter and Receiver. Deflecting mirrors make it possible to redirect the beams generated by the Emitter on several sides. -
Page 11: Distance From Reflective Surfaces
LS4 SAFETY LIGHT CURTAIN Distance from reflective surfaces The presence of reflective surfaces close to the light curtain may cause occasional reflections that prevent sensing. Referring to Figure 8, object A is not detected due to surface S that, reflecting the beam, closes the optical path between the Emitter and Receiver. -
Page 12: Mechanical Assembly And Optical Alignment
LS4 SAFETY LIGHT CURTAIN Mechanical assembly and optical alignment The Emitter and Receiver must be installed facing each other, at a distance equal to or less than that indicated in the technical data. Using the provided inserts and fastening brackets, place the Emitter and Receiver so that they are aligned and parallel to each other, and with the connectors facing the same side. -
Page 13: Vertical Positioning Of The Light Curtain
LS4 SAFETY LIGHT CURTAIN Vertical positioning of the light curtain Models with 14, 20mm resolution These models are suitable for fingers detection. point of Light curtain danger Models with 30, 40mm resolution These models are suitable for hand detection. The minimum safety distance S is calculated... -
Page 14: Multibeam Models
LS4 SAFETY LIGHT CURTAIN point of danger Multibeam Models These models are suitable for whole Light grid body detection and must not be used to detect arms or legs. The minimum safety distance S is determined according to the following formula:... -
Page 15: Electrical Connections
LS4 SAFETY LIGHT CURTAIN Electrical connections WARNINGS Before making electrical connections, make sure that the mains voltage matches the one indicated in the technical data. The Emitter and Receiver must be powered at a 24Vdc±20% (PELV, in compliance with the standard EN 60204-1 (Chapter 6.4)). -
Page 16: Emitter Connections
LS4 SAFETY LIGHT CURTAIN Emitter connections LS4E/**-***B - LS4E/**-*** (with integrated control functions) - LS4E/**-***M (MASTER models) M12 5-pin primary connectors. PIN COLOUR NAME TYPE DESCRIPTION Brown 24VDC 24VDC power supply Light curtain configuration White RANGE0 complying with the EN61131-2 standard (ref. -
Page 17: Receiver Connections
LS4 SAFETY LIGHT CURTAIN Receiver connections LS4R/**-***B models - M12, 5-pin connector. PIN COLOUR NAME TYPE DESCRIPTION OPERATION Brown 24VDC 24VDC power supply White OSSD1 Static safety output 1 PNP active high Blue 0VDC 0VDC power supply Black OSSD2 Static safety output 2... -
Page 18: Warnings Regarding Connection Cables
LS4 SAFETY LIGHT CURTAIN LS4R/**-***F - LS4R/**-***S (SLAVE/SLAVE2 models) - M12, 5-pin primary connectors. COLOUR NAME DESCRIPTION Brown 24VDC 24VDC power supply Communication White LINE_A MASTER-SLAVE Blue 0VDC 0VDC power supply Communication Black LINE_B MASTER-SLAVE Grey Ground connection Table 10 - M12, 5 pins Primary Slave RX LS4R/**-***M (MASTER models) - M12, 5-pin Secondary Connector. -
Page 19: Configuration And Operating Modes (Master Models / With Integrated Control Functions)
LS4 SAFETY LIGHT CURTAIN Configuration and operating modes (Master Models / With integrated control functions) The operating mode of the LS4 light curtain is set by making suitable connections on the M12 – 8- pin connector of the Receiver (Table 12). CONNECTIONS... -
Page 20: Connection Of External Contactors K1 And K2
LS4 SAFETY LIGHT CURTAIN Connection of external contactors K1 and K2 In both operating modes, it is possible to activate control of the external contactors K1/K2 (series of contacts). If this control is to be used, it is necessary to connect pin 4 of the M12 8-pin connector of the Receiver with the power supply (24VDC) via a set of NC contacts (feedback) of the external contactors. -
Page 21: Examples Of Connection With M.d. Safety Modules
2 and 4 of the Emitter as indicated in Table 4. Figure 21 - LS4 A: Manual operation with SB400 module For correct operation of the light curtain, connect pins 2 and 4 of the Emitter as indicated in Table 4. - Page 22 LS4 SAFETY LIGHT CURTAIN Figure 23 - LS4: Connection examples CAT8ELS1251403 • 26/06/2018...
- Page 23 MANUALE OSSD1 (White) OSSD1 (White) RELAY B OSSD2 (Black) AUTO OSSD2 (Black) AUTO EXTERNAL INPUT1 BARR CONTACTS INPUT1 BARR RELAY A FE (Grey) FE (Grey) INPUT2 BARR INPUT2 BARR RECEIVER RECEIVER Figure 24 - LS4: Connection examples CAT8ELS1251403 • 26/06/2018...
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Page 24: Operation And Technical Data
System power-on. Initial TEST. BREAK condition (A) GUARD condition (C) GREEN FAIL condition (Table 19) RED BLINKING Table 14 – RX light signals LS4 A / LS4 Slave MEANING TWO-COLOUR (Red/Green) (2) YELLOW (1) System power-on. Initial TEST BREAK condition (A) -
Page 25: Test Function
The minimum duration of the TEST command must be at least 4 msec. Status of the outputs On the Receiver of the LS4 there are two PNP static outputs whose status depends on the condition of the protected area. • The maximum permissible load for each output is 400mA@24VDC, corresponding to a resistive load of 60 Ω . -
Page 26: Technical Specifications
400mA 400mA RECEIVER Figure 26 – Correct load connection on the outputs Technical specifications TECHNICAL SPECIFICATIONS LS4 LIGHT CURTAINS Protected height 160 – 2260 Resolutions 14 - 20 - 30 – 40 - 50 - 90 No. of beams (Multibeam Models) - Page 27 LS4 SAFETY LIGHT CURTAIN 14 mm Resolution Models 1051 1201 1351 1501 1651 1801 1951 Number of beams Response time 14,5 16,5 23,5 Response time t tot = [0,06 * (N rslave1 + N rmaster ) + 0,9636] * 2...
- Page 28 LS4 SAFETY LIGHT CURTAIN 1959 2109 2259 90 mm Resolution Models 1059 1209 1359 1509 1659 1809 Number of beams Response time Response time t tot = [0,11 * (Nr slave1 + Nr master ) + 0,9376] * 2 (Master + 1 slave)
- Page 29 LS4 SAFETY LIGHT CURTAIN 20m MODELS 20 mm Resolution Models H 1052 1202 1352 1502 1652 1802 1952 Number of beams Response time 14,5 16,5 23,5 Response time t tot = [0,06 * (N rslave1 + N rmaster ) + 0,9636] * 2...
- Page 30 LS4 SAFETY LIGHT CURTAIN 50 mm Resolution Models H 1055 1205 1355 1505 1655 1805 1955 2105 2255 Number of beams Response time Response time t tot = [0,06 * (N rslave1 + N rmaster ) + 0,9636] * 2...
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Page 31: Dimensions
LS4 SAFETY LIGHT CURTAIN Dimensions LS4ER/**-***B - LS4ER/**-*** - LS4ER/**-***M – LS4ER/**-***S LS4ER/**-***F (Emitter and Receiver) (Emitter and Receiver) Figure 27 - Emitter and Receiver Model Height 150 250 300 450 600 750 900 1050 1200 1350 1500 1650 1800 1950 2100 2250... - Page 32 LS4 SAFETY LIGHT CURTAIN Figure 29 - Fastening brackets ST206 Figure 30 - Fastening brackets ST207S M8 Inserts Model SP100S SP300S SP400S SP600S SP700S SP900S 1060 SP1100S 1230 SP1200S 1400 SP1300S 1450 SP1500S 1600 SP1600S 1750 SP1800S 1900 Figure 32 - Fastening brackets for mirrors...
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Page 33: Checkouts And Maintenance
ON. Figure 33 – Efficiency check The LS4 light curtain does not require any specific maintenance; however, it is good practice to clean the front protective surfaces of the mirrors of the Emitter and Receiver. Clean with a damp cloth; in very dusty environments, after cleaning the front surface, spray with an anti-stat product. -
Page 34: Troubleshooting
LS4 SAFETY LIGHT CURTAIN Troubleshooting The indications provided by the leds on the Emitter and Receiver make it possible to trace the cause of any system malfunction. As indicated in the “LIGHT SIGNALS” paragraph of this manual, in the case of a fault, the system switches to stop status and the leds of each unit indicate the type of fault that has occurred. - Page 35 LS4 SAFETY LIGHT CURTAIN Check that the Emitter and the Receiver are correctly aligned and that front • surfaces are perfectly clean. It is advisable to keep the power supply of the light curtain separate from that of • other electric power equipments (electric motors, inverters, frequency variators) or other sources of disturbance.
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Page 36: Accessories/Spares
LS4 SAFETY LIGHT CURTAIN Accessories/Spares MODEL ITEM SB 400 SB400 safety module SB 400 M SB400M safety module with muting function CD12M/0H-050A3 Straight M12 5-pin female connector with 5-m cable CD12M/0H-050C3 90° M12 5-pin female connector with 5-m cable CD12M/0H-150A3... -
Page 37: Guarantee
LS4 SAFETY LIGHT CURTAIN GUARANTEE All new LS4 systems are guaranteed by M.D. for a period of 12 (twelve) months under normal working conditions, against defects due to faulty materials and workmanship. During the aforesaid period, M.D. promises to replace faulty parts free of charge. This guarantee covers both material and labour.
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