User's Guide BML-S1B0-Q_ _ _-M_ _ _-_0-KA_ _ BML-S1E0
Contents
1. 5 V Sense VT 5 V RD Power BML supply GND BU GND Sense BK Fig 5 1 5 V Power supply with Sense line 5 V Sense Power supply GND Sense Fig 5 2 5 V Power supply without Sense line Sample calculation Under the following conditions cable length 5 m Reference pulse is evaluated Control input impedance 120 Q Resulting voltage drop is V _ 0 23 x 5 x B x 3 1 120 0 03 0 1 V line BALLUFF 9 10 BML S1BO Q___ M_ BML S1E0 Q M_ Linear Position Encoder __ _0 KA__ 0 KA_ 5 3 Interfaces Digital incremental system The sensor transmits the measured variable to the controller as a digital differential voltage signal RS422 or as an operating voltage signal HTL The edge separation A B corresponds to the resolution of the sensing head Signal perigd 360 el l 1 a ee l 1 l 1 1 A B Edge separation Reference pulse Bei a len ae Ve ee ee T e e Te T 0 90 180 270 360 Fig 5 3 Digital output signals rn VY A channel A gt o gt 120 Q N gt 470 Q A A L GND E B channel B _ gt 2120 Q gt N gt 470 Q r B B e L GND LD V Reference Channel Z gt af 2120 Q NI gt 470 Q Z Z e Leno only for BML S1B0 Q61 only for BML S1B0 Q51 The 24 V inputs are connected to digital inputs on the controller2. 10 Technical Data Electrical data Model BML S1B0 Q Model BML S1E0 Q Output Digital RS422 or level same as supply voltage HTL Output signal A Signal B Signal reference signal Reference signal by type No signal one signal pole periodic signal fixed periodic signal Resolution 5 um 10 um 25 um 50 um Output voltage Differential RS422 signal or same as supply voltage HTL Limit switch Vmax 28 V In 20 MA N C GND switching cable break mon Overall system accuracy 50 um up to 1 mm distance 70 100 um depending on Sensor head tape above that 60 um with tape distance with tape BML MO1 146 see separate guide for magnetic tape BML MO1 145 Hysteresis depending on air gap 3 to 7 um max non linearity of the processing 30 um at tape distance lt 1 mm 50 um at distance lt 2 mm electronics unidirectional 40 um at tape distance gt 1 mm to tape Temperature coefficient of overall 10 5 x 10 K system like steel Max traverse speed Depending on model see Table 6 1 6 2 Reverse polarity protected Yes at 10 30 V Overvoltage protected no Operating voltage 5V 5 or 10 30 V Current draw lt 50 mA current draw of the controller depending on internal resistance at 5 V operating voltage Current draw lt 40 mA current draw of the controller depending on internal resistance at 10 30 V operating voltage Vibration per IEC 60068 2 27 100 g 6 ms Continuous shock 100 g 2 ms er IEC 60068 2 29 Vibration per IEC 60068 2 6 12 g
3. The controller precisely evaluates the reference position when the switch and the reference point signal of the sensing head are active Therefore the accuracy requirement for this switch is not especially great The sensor head with an additio nal reference point sensor can Incremental sensors also be combined with a magnetic tape having fixed periodic reference points Fig 3 4 Here the reference points are integrated across the entire length of the tape at certain constant intervals such as every 10 cm To determine the exact position the reference move must cover the entire length of the tape up to the external reference switch Advantages of the pole periodic and fixed periodic tapes You can purchase the tape in long lengths and trim it yourself to length Tape without reference point with pole periodic reference point Fig 3 3 Displacement measurement system with or without pole periodic reference point Reference point sensor Tape with one reference point lo reference point Tape with fixed periodic referenced points Cg Magnetic reference points Fig 3 4 Displacement measurement system with reference point function BALLUFF 5 BML S1B0 Q__ BML S1E0 Q_ _ Linear Position Encoder 4 Installing the Sensor Important installation notes The permissible distance and angle tolerances as per Figs 4 2 4
4. BALLUFF sensors worldwide BML S1B0 Q___ M___ _0 KA__ BML S1E0 Q__ _ M___ 0 KA_ User s Guide BALLUFF Balluff GmbH Schurwaldstrasse 9 73765 Neuhausen a d F Germany Phone 49 7158 173 0 Fax 49 7158 5010 Servicehotline 49 7158 173 370 balluff balluff de www balluff com 2 BML S1BO Q___ M_ BML S1E0 Q M Linear Position Encoder 1 Safety Advisories nuuununnnnnnnn 2 1 1 Intended use esse sese 2 1 2 Qualified personnel 2 1 3 Use and testing sss sese 2 1 4 MY 2 2 Functional variants 3 3 Function and Characteristics uuunennnnnneenn 4 3 1 Characteristics 4 3 2 Principle of operation 4 3 3 Interface signals 00 4 3 4 Limit switch function 4 3 5 Reference point function 5 4 Installing the sensor 6 4 1 Installing sensor and magnetic tape linear motion 6 Distances tolerances 6 Determining orientation T Attaching sensor head 7 Selecting the tape 7 Installing limit switches 8 4 2 Installing sensor and magnet ring rotary Motion 8 5 WINING TH 9 5 1 Cable assignments 9 5 2 Connecting the Sense line 9 5 3 Interfaces une 10 6 Selecting the Appropriate BML and Controller System 11 6 1 Standard BML 11 6 2 BML with
5. 10 2000 Hz Ambient conditions Operating temperature 20 C 80 C Storage temperature 30 C 85 C Degree of protection per IEC 60529 IP67 Mechanical data sensor head to tape gap 0 01 2 mm Housing material PBT Connection type 12 conductor cable LIFI2YFCF11Y 6x2x0 08 mm Weight 11 g without cable 1 Individually determined as per Balluff Factory Standard BALLUFF BNL S1B0 0 _ M_ BML S1E0 Q M lt _ Linear Position Encoder __ _0 KA__ 0 KA_ 10 Technical Data cont Limit switch magnet BML Z0006 Dimensions L x W x H Magnet housing 20 x 12 x 9 5 mm Limit switch magnet 20x2x5 mm Cable Type PU cable 12 conductor drag chain compatible Operating temperature Flexed 20 80 C Fixed 40 90 C Cable diameter 5 4 0 2 mm Cable bending radius Flexed 81 mm Fixed 41 mm 11 Scope of delivery Sensor head Short guide 2 limit switch magnets only for BML M__3 BALLUFF 17 BML S1BO Q___ M_ BML S1E0 Q _ _ M __ _ Linear Position Encoder __ _0 KA__ 0 KA_ 11 Versions Part numbering for sensing head printed on part label BML S1BO Q53G M413 10 KA05 example ge Connection KA05 PUR cable 5 m Possible cable lengths 2 5 10 15 20 m min edge separation max traverse speed D 0 12 us E 0 29 us F 0 48 us G 1 us H 2 us K 4us L 8us N 16us P 24us 1 approx 1 m s discontinued model cannot be ordered 2 approx 10 m s discontinued m
6. 3 000 1 950 450 225 117 78 F 5 um 32 000 12 000 12 000 6 000 3 900 1 800 450 2 C e O1 O G 10 um 16 000 12 000 12 000 12 000 8 850 4 620 2 3 0 1 020 5 390 J O H 25 um 6 400 max speed for magnet ring BML M2x 048 7 900 7 900 7 900 750 281 563 28 638 F Olin G 10 um H 25 um 46 000 23 000 9 200 max speed for magnet ring BML M2x 072 5 217 391 183 196 391 Ol _ co O N N O CO IN 5 217 103 lt A Fi 5 217 5217 3 848 2 009 1 030 443 4 00 K 50 um 2 000 12 000 12 000 12 000 8 850 4 620 2 370 1 020 570 390 K 50 um 3 200 7 900 7 900 7 900 5 031 2 888 1 481 638 356 244 K 50 um 4 600 5 217 5 217 5 217 3 848 2 009 1 030 443 248 170 BALLUFF 13 BML S1BO Q___ M_ BML S1E0 Q _ _ M __ _ _ Linear Position Encoder __ _0 KA__ 0 KA_ 7 Startup 8 Accessories order separately 7 1 Check connections 8 1 Limit switch magnets 8 2 Tape cover BML Z0006 Caution The connections are not To prevent damage to the tape from protected against polarity reversal The magnets can be used with or things like chips or chemicals it or short circuit Before turning on without housing The through holes may be covered with a strip of power check the connections make it easy to precisely install stainless steel carefully to prevent components these limit switch mag
7. Emerg stop Travel 12 mm ae Fig 4 7 Traverse and emergency stop distances for limit switches with and without housing Sensor head Limit switch adhered to the machine 3 5 45mm Maintain distance from mounting surface T Magnetic 0 9 2 8 mm tape Fig 4 8 Installation example for limit switch without housing BALLUFF 7 8 BML S1B0 Q___ M___ _0 KA__ BML S1E0 Q M _ 0 KA Linear Position Encoder 4 Installing the Sensor cont 4 2 Installing sensor and magnet rings rotary motion The sensor can be installed with the Important installation notes cable entry to the right or left with The permissible distance and angle Direct contact with holding a to the magnet ring Fig 4 tolerances as per Figs 3 5 3 6 and solenoids or other permanent 3 7 must be strictly observed magnets must be avoided Note The sensor head must not be The displacement measurement allowed to touch the magnet ring system must be installed in The magnetic tape must not be accordance with the specified subjected to strong external enclosure rating magnetic fields For a detailed technical description and installation instructions for magnet rings see User s Guide at www balluff de Rear view Front view with cable 0 5 0 5 mm 0 5 0 5 mm I Q emental I I I I I I I ensors I I I I I I I 0 1 2mm
8. Magnetic Stainless tape steel cover strip Fig 4 2 Permissible air gap between sensor head and tape 0 01 2 mm Ss BML with single or fixed periodic reference point BML without reference point or with pole periodic reference point Fig 4 3 Permissible horizontal tolerance to right or left _ ven l Fig 4 4 Permissible angle tolerances I ae ee Oe e n m Magnetic tape BNL S1B0 0 _ M_ BML SiEO Q___ M_ Linear Position Encoder __ _0 KA__ 0 KA_ 4 Installing the Sensor cont 4 2 Determining orientation The alignments at the front rear and left are referred to in the installation description and are essential for the correct installation of the sensing head and tape Starting from the travel direction of the sensing head the orientations are defined in Fig 4 5 Front Left side Direction of D Eal CEN Right side Reference point Rear Fig 4 5 Orientation 4 5 Installing limit switches The front and rear limit switch magnets must always be installed on the right side of the sensing head When the limit switch is in a housing always attach the front magnet with its nose facing back and the rear magnet with its nose facing front When the limit switch is not in a housing attach the rear magnet with the slot to the left of
9. Turn on power to the sensor magnet rings see User s Guide at head www balluff de 2 Move the sensing head along the entire measuring range 3 Check whether all signals are output 4 Check whether the count direction agrees with the direction of travel If not reverse connections A and IK Fig 8 1 Magnets and housing 7 4 Regular checking The functionality of the transducer system and all its associated components should be checked and logged at regular intervals 7 5 Malfunction If there is any indication that the transducer system is not functioning properly remove it from service and secure it against unauthorized use see also Troubleshooting 14 BALLUFF BNL S1B0 0 _ M_ BML S1E0 Q M Linear Position Encoder __ _0 KA__ 0 KA_ 9 Troubleshooting Remedy Explanation Problem The controller is receiving at times no distance information The controller is receiving no distance information at certain points Position signal is highly noisy Limit switches not switching correctly Reference point signal not being output Linearity deviation is out of tolerance Possible causes The necessary supply voltage is not present The voltage drop is too great see formula page 9 Cables are not connected The orientation of the tape with reference point is not correct The distance between sensor head and tape is in places wrong The magn
10. center and the rear magnet with the slot right of center Fig 4 6 4 8 The following applies to both limit switch types If the E stop travel exceeds the length of the limit switch magnet multiple magnets may be installed in a row Fig 4 7 For ordering information see Section 7 1 The limit switch sensor becomes active as soon as it begins to enter the magnetic field of the limit switch magnet Fig 4 8 4 3 Attaching sensor head The sensor head should be secured with M3 screws with its right or left side against the machine part whose position is to be determined Important No forces allowed on the housing cable Provide strain relief for the cable Los s n s s n Limit switch magnet rear ei INNERN Limit switch magnet front Recommendation for selecting the tape BML S1B Tape BML M02 145 System accuracy 10 um BML S1E Tape BML M02 146 or magnet rings Note For a detailed technical description and installation instructions for tapes see User s Guide for tape at www balluff de ered e Ne C0 3 3 anna ae i Slot left of center Fig 4 6 Installing the limit switch magnets Limit switch magnet rear Limit switch magne front groove right of center The limit switch sensor is activated at about this position Y sn THI 6 amp mm Travel direction measuring range
11. edge separation and on the resolution see Table 6 1 In the table the X indicates the min edge separation in time of the BML model and Y the mechanical resolution see part numbering code BML S1A1 Q61Y M313 XO KAO5 model example Edge separation l Mechanical resolution Standard BML Resolution Y F 5 um G 10 um H 25 um K 50 um Edge sep X V ax corresponding to edge separation and resolution Table 6 1 Standard BML with defined min edge separations Determining the appropriate controller for an existing BML system linear motion What does the max counting frequency of the controller need to be The period of the input signal is 4x the edge separation see Fig 5 3 The max frequency of the input signal is then 1 4x edge separation Example With an edge separation of 1 us for the model G BML the max frequency of the input signal is 1 4 us 250 kHz The max counting frequency for 4x evaluation is 1 edge separation 1 1 us 1 MHZ 6 2 BML with predefined traverse speed predecessor to the standard BML Linear motion The requirements for your controller counting frequency and for the traverse speed of your system can be determined from the BML model used see part numbering code Note the values from following table 6 2 Example see Table 6 2 column 2 For a BML model with 5 um resolution F type and a max speed of 1 m s type code 1 the following apply The small
12. sign of the phase shift determined by the direction of travel of the sensor Fig 3 1 Each edge change from A or B represents a counting step for the period counter UP DOWN counter When Signal A is ahead the counting state increases and when Signal B is ahead the count decreases The controller thus always knows the increment precise position without having to periodically poll the sensor real time capability Note for correct function the A and B signals must be evaluated direction dependent Signal A Signal B Direction of motion Counter state 40 41 Increment er if Forwards S R B 8 8 8 S Backwards 42 43 44 43 2 M 40 3 Fig 3 1 Digitized sinusoidal and cosinusoidal signals with period counter 3 4 Limit switch function When limit switch functionality is needed sensing heads can be equipped in addition with a limit switch sensor which senses opposite pole permanent magnets at the ends of the measuring range and sends the signals to the controller Fig 3 2 Limit switch sensors Limit switch magnet rear The limit switch sensors function then even ifthe rest ofthe sensor fails security function If the actuation range of the limit switches needs to be longer than their length 20 mm multiple limit switches of the same type can be mounted in rows Incremental sensors Limit switch magnet front Fig 3 2 Displacement measurement system
13. 3 and 4 4 must be strictly observed The sensing head may not come in contact with the tape at any point along the travel Contact must still be avoided if the stainless steel cover optional is used The magnetic tape must not be subjected to strong external magnetic fields Direct contact with holding solenoids or other permanent magnets must be avoided The displacement measurement system must be installed in accordance with the specified enclosure rating 4 1 Distances tolerances The following distances and tolerance must be observed when installing the sensing head and tape The distance air gap between sensing head and tape as per Fig 4 2 The horizontal offset between sensing head and tape as per Fig 4 3 The angle tolerances as per Fig 4 4 Any tilt along the longitu dinal axis of the sensing head must still maintain the nominal _ M___ _0 KA _ M___ _0 KA E Q H U a O O distance to the tape in the center of the head The two incremental sensors are located there on the underside Note Even slight tolerance deviations can affect the measuring result The specified system accuracy applies only if the tape is installed parallel to the direction of travel 6 BALLUFF _ 0 01 2 mm ZZ
14. Fig 5 4 Circuit for following electronics BALLUFF Circuit for reference position Depending on the model the sensor sends either no reference signal a single reference signal which is magnetically encoded in the tape or a periodic reference signal period 5 mm width of the reference signal edge separation Fig 5 3 In the latter case an external reference switch must be attached to the desired reference signal The accuracy requirements of this switch are not especially high Note The reference signals from the limit switch area are not allowed to be processed z 5 Reference signal for the controller ee External switch Fig 5 5 Reference position circuit Circuit for limit switches front and back The opposite poled permanent magnets at the ends of the measuring range are each sensed by a limit switch sensor The sensor has a normally closed function so that cable break can be detected Controller Limit switch front Rear limit switch Fig 5 6 Limit switch circuit i GO opoo Rear limit switch T Front limit switch Fig 5 7 Limit switch signals Relationship between mechanical resolution and max frequency The requirements for your controller counting frequency and for the traverse speed of your system can be determined from the BML model used see part numbering code p 18 Note the va
15. Laboratory which is accredited by DATech for Testing Electromagnetic Compatibility has confirmed that Balluff products meet the EMC requirements of the following Generic Standards EN 61000 6 4 emission EN 61000 6 2 noise immunity In particular measures must be taken to ensure that a defect in the displacement sensor will not result in hazards to persons or equipment This includes installation of additio nal safety limit switches emergency stop switches and the maintaining of permissible ambient conditions BML displacement sensors may not be used in life saving systems in aircraft etc 1 4 Validity This Guide is valid for displacement sensors models BML S1B0 Q KA__ and BML S1E0 Q KA_ _ An overview of the various versions can be found in section 12 Vers ions refer to part label Emission tests RF Emission EN 55011 Group 1 Class A B Noise immunity tests Static electricity ESD EN 61000 4 2 Severity level 3 Electromagnetic fields RFI EN 61000 4 3 Severity level 3 Fast transients Burst EN 61000 4 4 Severity level 3 Surge EN 61000 4 5 Severity level 2 Line induced noise induced by high frequency fields EN 61000 4 6 Severity level 3 Magnetic fields EN 61000 4 8 Severity level 4 BML S1B0 Q___ M___ _0 KA__ BML S1E0 Q M _ 0 KA Linear Position Encoder Functional variants of the displacement sensor The BML is a non contact incremental displacement feedback system
16. M Fig 4 9 Permissible gap Fig 4 10 Permissible r axial offset Fig 4 11 Permissible tangential offset BALLUFF BML S1B0 Q___ M___ _0 KA__ BML S1E0 Q M _ 0 KA Linear Position Encoder 5 Wiring Note the following when making The cable shield must be electrical connections grounded on the controller side i e connect to the protection ground The system and the control cabinet must be atthe same ground potential When routing the cable between To ensure EMC which Balluff the transducer controller and confirms with the CE Marking the power supply avoid proximity to following instructions must be high voltage lines due to noise followed coupling Especially critical are stray coupling caused by AC harmonics e g from phase controls against which the cable shield offers little protection 5 1 Cable assignments 5 2 Connecting the Sense line 12 conductor cable with Sense line To avoid voltage drop in the cable measurement line for preventing when operating at 5 V a controlled voltage drop in the incoming line mains adapter with polarity sensing input should be used Fig 5 1 If that Cable Signal is not possible or desired the Sense WH white A lines in the 12 conductor cable BN brown A orn c should be connected parallel to the GN Be 5 V and GND line Fig 5 2 S When operating at 10 30 V it must YE yellow Born c only be ensured that the voltage GY gray Z Ref signal does not fal
17. TC consisting of a sensor head and a magnetic tape The system is available in 0 several variants with position signal function only with additional reference point function and or with limit switch function All functions are implemented by means of magnetic sensing The reference position is integrated in the tape and limit switch magnets can be attached at any desired position The following table show the functional variants with their possibilities Incremental Limit switch sensors sensors Output signal A Signal B Signal Reference signal none Single signal Pole periodic Reference point sensor Fixed periodic Fig 2 1 Sensor head configuration Limit switch Front and rear Tape with alternating north and south poles System variant 1 BML M0_ R0000 No reference point signal BML S1B1 M_0_ Tape with one ref point LL LLLE ee TT R BML S1B1 M_1_ System variant 3 Pole periodic reference un EL BML M0_ ROOOO point signals BML S1B1 M_2_ System variant 2 One reference point signal Tape with multiple ref points at System variant 4 equal distances Fixed periodic reference I U Li l Fri point signals Li m BML S1B1 M_1_ Fig 2 2 Length measurement systems oe Pe mm R Note 1 UIIUTIUT For a detailed technical description eo P Limit switch magnet joes and installation instructions for tape
18. corresponds to the specified pulse count revolution Example Assumptions The specified pulse number is 10 000 revolution see Step 1 BML M2x 031 ring and BML resolution 10 um The max rotational speed should be 5 000 rpm Determining the suitable BML sensor head see Table 6 4 Search column G 10 um 10 000 pulses for every line whose rotational speed is greater than the required speed The sensor head with 0 48 um edge separation F type is suitable Together with magnet ring BML M2x 031 it meets the system requirements BALLUFF Magnet ring type No of poles 20 Resolution Y Sensor head F 5um 20 000 G 10 um 10 000 H 25 um 4 000 K 50 um 2 000 BML M2 031 Determining resolution and max rotational speed for BML systems with magnet ring rotary motion BML M2 048 BML M2 072 32 46 Pulses per revolution with 4x interpolation 32 000 46 000 16 000 23 000 6 400 9 200 3 200 4 600 Table 6 3 Pulses revolution of a BML S1B S1C system with magnet rings Step 2B controller is given If there is a controller with the min edge separation a max speed results from a selected resolution pulses revolution Example Assumptions Let the min edge separation be 0 9 us Determining the suitable BML system see Table 6 4 The edge separation is provided by the BML system consisting of a magnet ring BML M2x 031 and a sensor hea
19. d with 1 um edge separation G type and a resolution of 10 um G type Using this system a max speed of 3 900 rpm is possible If this speed is not sufficient the number of pulses per revolution resolution needs to be reduced e g to 4000 H type Using this system a max speed of 8 850 rpm is possible Tables 6 4 to 6 6 show the relationship between the min edge separation mechanical resolution and the max rotational speed for BML systems using magnet rings Example BML S1E0 Q53H M413 K0 KA05 mech resolution Y see table for code min edge separation X see Tables 6 4 to 6 6 for codes BML S1BO Q___ M_ BML S1iEO Q___ M_ Linear Position Encoder __ _0 KA__ 0 KA_ TARIEDE mech resolution Y Pulses revolution min edge separation X max kHz A B Sig D 0 12 us 2 100 E 0 29 us 860 F 0 48 us 520 G 1 US 250 H 2 us 125 K 4 US 63 L 8 us 32 N 16 us 16 P 24 us 10 ne mech resolution Y Pulses revolution min edge separation X max kHz A B Sig D 0 12 us 2100 E 0 29 us 860 F 0 48 us 520 G 1us 250 H 2 us Zo K 4us 63 L 8 us 32 N 16 us 16 P 24 us 10 Table 6 6 mech resolution Y Pulses revolution min edge separation X max kHz A B Sig D 0 12 us 2100 E 0 29 us 860 F 0 48 us 520 G 1us 250 H 2us 125 K 4us 63 L 8us 32 N 16 us 16 P 24 us 10 ES 20 000 G 10 um 10 000 H 25 um 4 000 max speed for magnet ring BML M2x 031 12 000 6 000
20. est edge separation which your controller must be able to count is 3 1 us In the table X indicates the max traverse speed for the BML model and Y the mechanical resolution BML S1A1 Q61Y M313 XO KAO5 model example max traverse speed code 1 or 2 mech resolution For code see Tab 6 2 Predecessor Resolution Y BML EUI G 10 um H 25 um K 50 um Vix X min possible edge separation Table 6 2 Predecessor BML with defined max traverse speeds BALLUFF 11 12 BML S1B0 Q__ BML S1E0 Q M_ Linear Position Encoder NM Selecting the Appropriate BML and Controller System 6 3 Step 1 First decide how many pulses per revolution your application requires This will be used to select the magnet ring outside diameter the resolution of the sensor head and the sensor head model BML S1B S1E Table 6 3 shows for each magnet ring the relationship between the number of pulses per revolution and the resolution of the sensor head Example see Table 6 3 The application requires 10 000 pulses revolution These pulses are provided by the BML system consisting of a sensor head with a resolution of 10 um G type and a BML M2x 031 magnet ring Step 2A rotational speed is given If the rotational speed is a given for your application select starting with the magnet ring and resolution selected in Step 1 the sensor head with the minimum edge separation which
21. etic poles of the tape are damaged in places by the presence of strong magnets Distance between sensor head and tape is too great The distance between the limit switch magnets and sensor head is incorrect The limit switch magnets are mounted with the wrong side facing the sensor head wrong polarity The orientation of the tape with reference point is not correct The sensor head is not moving par allel to the tape see Fig 4 4 for tolerance Distance between sensor head and tape is too great Check whether power is present and whether the BML is properly connected The system must have an operating voltage of 10 30 V or 5 5 Check the voltage on the Sense line or using the formula p 9 Check cables against the wiring diagrams The reference point mark must be on the right side of the sensor head Fig 4 5 Install new tape correctly Adjust the height of the sensor head To check move the head manually over the entire measuring range Replace tape Attach sensor head closer to tape Check and correct distance and angle to tape Fig 4 6 Check and correct the limit switch magnets with respect to the travel direction Fig 4 7 The reference point mark must be on the right side of the sensor head Fig 4 5 Replace tape Correctly position the sensor head section 4 BALLUFF 15 16 BML S1BO Q___ M_ BML S1E0 Q _ _ M __ _ _ Linear Position Encoder __ _0 KA__ 0 KA_
22. l below 10 V Such a PK pink Zorn c power supply does not normally BU bine GND possess a Sense line RD red 5 V or 24 V BK black GND Sense VT violet 5 24 V Sense GYPK gray pink Front limit switch RDBU red blue Rear limit switch TR transp Shield 0 34 mm BK black Shield 0 34 mm Applies only to BML S1B0 Q53 and BML S1E0 Q53 Discontinued version These wires only for BML S1B0 Q53_ M400 and BML STEO Q53_ M400 Calculating the voltage drop in the line For the 5 V version of the BML the supply voltage must be 5 V 5 The power supply must ensure this voltage and also compensate for the voltage drop in the line When operating at 10 30 V the voltage must be gt 10 V Use the following formula to calculate the voltage drop in the line Vline R x 1x n x 3 1 R 0 03 where line V Voltage drop in the line in Volt R 0 23 for the parallel wiring of the Sense lines with the supply lines Fig 5 2 Cable length in m n 3 if the reference pulse is processed in the controller 2 if the reference pulse is not processed in the controller Input impedance of the controller in Ohm Cable length max 20 m conductor cross section min 0 14 mm max 0 5 mm Longer cables may be used if their construction shielding and routing resist external noise fields Important In spite of a voltage drop in the line a nominal operating voltage of 10 to 30 V or 5 V 5 must be ensured see 5 2
23. lues from the following table Example for table line 1 Using a BML with a resolution of 5 um and a max speed around 1 m s slow model the results are as follows The smallest edge separation which your controller must be able to count is 3 1 us BML S1B0 Q__ BML S1E0 Q M_ Linear Position Encoder NM Selecting the Appropriate BML and Controller System Tables 6 1 and 6 2 show the relationship between the mech resolution the min edge separation and the max traverse speed for BML systems using a magnetic tape Important The controller display must be able to count the minimum time based edge separations shown in the tables note the counting frequency of your controller The min edge separation may even be present in the stopped state due to the internal interpolation procedure 6 1 Standard BML Tab 6 1 Determining the appropriate BML system for an existing controller linear motion Example see Table 6 1 Assumptions Your controller can detect a min edge separation of 1 8 us If there is no BML with this min edge separation select a BML with greater edge separation The max traverse speed of the system should be 2 m s Determining the appropriate BML You need a BML with min edge separation 2 us H type To be able to traverse at max 2 m s select the model with 10 um resolution G type With the standard BML the maximum traverse speed depends on the
24. nets Note that the permissible distance from being destroyed by incorrect Fig 4 8 The housing should be between the sensing head and tape connections or overvoltage fitted with a magnet only on its side is reduced now by the thickness of facing the sensor the cover strip with adhesive film 7 2 Turn on system The space saving magnets can be 0 15 mm Fig 4 2 Note tharik t c glued or attached using customer Before adhering the cover strip on t S a ee de eal ae supplied holders The upper side is thoroughly clean the surface of the en a S ata N C I marked with a notch tape acetone turpentine mild Se Mae a Sa ma a aa If the E stop travel exceeds the plastic cleaner no gasoline Sp S Sne SE Er G k length of the limit switch magnet A multiple magnets may be installed Ship configurations part of a control system for which the in a row for installation see 4 5 IT ters have yet to be set ape cover and tape can parans y The scope of delivery includes t pe or 4 be ordered together in the Therefore be sure that no hazards 2 magnets with housing could result from an unpredictable appropriate length 2 magnets without housing and 1 installation guide N eye ordered in 4 defined lengths start 7 3 Check system function After installing the transducer S Note system or replacing the sensing head check all functions as follows For a detailed technical description j n and installation instructions for 1
25. odel cannot be ordered Limit switch 0 no limit switch 3 two limit switches Reference signal 0 no signal 1 single signal or fixed periodic 2 pole periodic signal Pole width 4 5mm Resolution edge separation A B pe um G 10 um H 25 um K 50 um Output voltage 1 digital square wave signal RS422 3 level same as supply voltage only for 10 30 V Supply voltage 5 24 V 10 30 V 6 5V Style B Non linearity of the electronics 50 60 um E Non linearity of the electronics 100 um 18 BALLUFF No 841 971 726 E s 02 108392 e Edition 0711 specifications subject to changes s Replaces edition 0512
26. predefined traverse speed 11 6 3 BML system with magnet ring 12 7 Startup renden 14 7 1 Checking connections 14 7 2 Turning on the system 14 7 3 Checking system function 14 7 4 Regular checking 14 7 5 Malfunction esse eee ee eee 14 8 Accessories ccccssssccseeceseees 14 8 1 Limit switch magnets 14 8 2 Cover strip eee eee 14 9 Troubleshooting uu 15 10 Technical Data 16 11 Scope of Delivery 17 12 Versions indicated on part label cssseceseeeseeees 18 BALLUFF __ _0 KA__ 0 KA_ 1 Safety Advisories Read this manual before installing the sensor and placing it in operation 1 1 Intended use The BML displacement sensor is fitted into a machine or piece of equipment for its application Together with a controller PLC it comprises a displacement measurement system and may be used only for this purpose Unauthorized modifications and non allowed use will result in loss of guarantee and warranty 1 2 Qualified personnel This manual is intended for technical personnel who are involved in installation and setup 1 3 Use and testing Prevailing safety regulations and codes must be observed for using the displacement sensor The CE Mark verifies that our products meet the requirements of EC Directive 89 336 EEC EMC Directive and the EMC Law Testing in our EMC
27. s see User s Guide for tape at Fig 2 3 Length measurement system with limit switch sensors tape with www balluff de reference points and limit switch magnets BALLUFF 3 BML S1B0 Q__ BML S1E0 Q M_ Linear Position Encoder S Function and Characteristics 3 1 Characteristics BML displacement sensors are characterized by High system accuracy of 50 um High resolution of up to 5 um High traverse speed of up to 20 m s Position signal in real time Insensitive to shock vibration and contamination such as dust and oil Wear and maintenance free Rugged Enclosure rating IP 67 per IEC 60529 3 2 Principle of operation The sensing head is attached to the machine member whose position is to be determined while the magnetic tape is mounted along the direction of travel The tape contains alternating magnetic north and south poles The two incremental sensors in the sensing head measure the magnetic alternating field As the sensing head travels over the tape the two incremental sensors pick up the magnetic periods so that the controller can determine the distance traveled 4 BALLUFF 3 3 Interface signals The sensing head can convert the sinusoidal and cosinusoidal signals either into A B pulses and send them to the controller RS422 The digital A B pulses are interpolated in the sensing head The two digital pulses Aand B are 90 phase shifted with the
28. with limit switch function BNL S1B0 0 _ M_ BML SiEO Q___ M_ Linear Position Encoder __ _0 KA__ 0 KA_ 3 Function and characteristics cont 3 5 Reference point function The reference position is always required as the starting point for the count for each incremental displacement system How the reference position is determined depends on the sensor type the tape and on the controller Inthe simplest system the sensing head with the sinusoidal and cosinusoidal sensors can count only the magnetic periods The tape contains only one track with magnetic north and south poles Fig 3 3 In this case the displacement measuring system does not know the absolute position This is determined by the controller by adding the counted increments First however the reference position must be determined by ahoming move to the reference switch A sensing head with an additio nal reference point sensor can output a reference point signal as soon as it reaches the magnetically encoded reference point on the second track of the tape Fig 3 4 An external reference switch is not needed In another sensing head version a reference point signal is output with each magnetic pole Fig 3 3 The signal is repeated every 5 millimeters pole periodic The tape does not require a second track with a magnetically encoded reference point In this case a reference switch needs to be used for the selected reference signal
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