DS3 SERIES Object detection and measurement light grid INSTRUCTION MANUAL
DATASENSOR S.p.A. Via Lavino 26 5 4005 0 Monte S. Pietro - Bolog na - Italy Tel: +39 051 676 561 1 Fax: +39 051 6759 324 http://www.datasensor.com e-mail: info@datas ensor.com DATASENSOR S.p.A. cares for the environment: 100 % recycle d pap er. DATASENSOR S.p.A. reserves the right to make modificati ons an d improv ements with out prior n otificatio n. DECLARATION OF CONFORMITY We DATASENSOR S.p.A.
DS series Instructions manual INDEX 1. GENERAL INFORMATION .........................................................................................pag. 1.1. General description of the AREAscanä ä light grid.......................................pag. 1.2. Selecting the devic e...........................................................................................pag. 1.3. Typic al applications ............................................................................................pag. 1 1 2 3 2.
Instructions manual DS series 1. GENERAL INFORMATION 1.1. General description of the ARE Ascan TM light grid TM The AREAscan light grids are optoelectronic multibeam devices that can be used to detect transparent and small objects and for dimensional measurement. The variety of possibile functions makes DS3 a particularly flexible device suitable to many different applications.
DS series Instructions manual Some parts or paragraphs of this manual containing important information for the operator are preceded by a note: Notes and detailed descriptions about particular characteristics of the AREAscanTM devices in order to better explain their functioning. DATASENSOR technical assistance is available for any necessary information related to the functioning and/or installation of the DS3 series light grids (see section 9 “Checks and periodical maintenance”). 1.2.
Instructions manual 1.3. DS series Typical applications The following images supply an overview on some of the main applications.
DS series 2 Instructions manual INSTALLATION MODE 2.1. Precautions to be observed for the choice and installation of the device • The dimension of the smallest object to be detected should not to be lower than the resolution level of the device. • The DS3 should be installed in a place compatible with the technical characteristics (see section 10 “Technical Data”) of the TM AREAscan light grids.
Instructions manual 2.2. DS series General information on the device positioning • Place the device near the detection area. • Align the receiver (RX) and emitter (TX) units parallel to one another. • Fix the receiver and emitter units on rigid supports not affected by strong vibrations using the specific brackets (see section 3 “Mechanical mounting”). • Check that the distance between the receiver and emitter units is within the device operating distance (see section 10 “Technical data”). 2.2.
DS series Instructions manual 2.2.2. Minimum distance from reflecting surfaces Reflecting surfaces placed near the light beams of the AREAscanTM device (over, under or laterally) may cause passive reflections; these reflections could compromise the recognition of an object inside the controlled area (see Fig.1). Fig. 1 However, if the receiver detects a secondary beam (reflected by the side-reflecting surface) the object cannot be detected, even if the main beam is interrupted by the entering object.
Instructions manual DS series It is thus important to position the light grid according to the minimum distance from any reflecting surface.
DS series Instructions manual 2.2.3. Installation of several adjacent light grids When several devices must be installed in adjacent areas, care must be taken to prevent interference between the emitter of one device and the receiver of another. Fig.2 gives an example of possible interferences between different devices and two pertinent solutions. NO YES YES Fig.
Instructions manual DS series 3. MECHANICAL MOUNTING The emitting and receiving bars must be installed with the relevant sensitive surfaces turned towards each other; the connectors must be positioned on the same side and the distance must be included within the operating range of the model used (see section 10 “Technical data”). Once they have been positioned, the two bars should be aligned and completely parallel. To mount the device, use the threaded pins supplied (Fig.
DS series Instructions manual 4. ELECTRICAL CONNECTIONS The electrical connection between the emitter and receiver units is made through male M12 connectors, located in the lower part of the light grids.
Instructions manual DS series 4.1. Notes on the connections For the correct functioning of the AREAscanTM. light grid, the following precautions regarding the electrical connections should be taken: • Sheilded cables are not foreseen in the standard connection. However, if necessary, these cables can be used; in this case ground connection is necessary of both the unit and cable, as shown in Fig.5. Fig. 5 The cables must not be placed in contact with or near any high voltage cable (e.g.
DS series Instructions manual • The AREAscanTM are NOT safety devices and so MUST NOT be used to control the safety of the machines where installed. • The ground connection of the two units is not necessary. However, if required, the connection is possible; tighten the special screw – supplied with the device – instead of one of the 8 screws that lock the heads of each bar (see Fig.6). • Follow the connection illustrated in Fig.5 when ground connection of the entire system is used. Fig.
Instructions manual DS series 5. FUNCTION SELECTION The functions implemented in the AREAscanTM devices can be selected using the dip-switches inside the receiver unit as shown in Fig.7. The SET pushbutton, necessary for the calibration procedure (see section 6 “Calibration Procedure”) and teach-in function (see section 7.3 “Teach-in detection of objects”), is present on the same unit. SET pushbutton DIP-SWITCH Fig. 7 5.1.
DS series Instructions manual Table 1 indicates the type of function and the relative position of the dip-switches. Tab. 1 NOTE: The dip-sw itches not used are show n in grey. Black indicates the position of the dip-switch lever used.
Instructions manual DS series 6. CALIBRATION PROCEDURE The calibration procedure sets the signal level that arrives from the receiver in the rest condition (no object detection). In every other condition, the acquired signal will be compared to the one acquired during the calibration. The calibration depends on the alignment and distance of the two units; the procedure must be repeated every time these parameters change. 6.1.
DS series Instructions manual 7. FUNCTIONING MODE The DS3 light grid is a detection and measurement device and thus the beam interruption due to an object causes the switching of the digital output (PNP type) and/or the change of the analog output signal. Small objects (up to 0.5 mm), transparent films and measurement of geometrical dimensions with a 6 mm resolution, can be obtained by setting the device at the right sensitivity. The different functioning modes available are listed below: 7.1.
Instructions manual • DS series Scanning w ith CROSSED beams: where several photoreceivers are illuminated by the beam of a single photoemitter (this mode activates a series of photoreceivers and one photoemitter contemporarily, during the scanning cycle). The scanning with crossed beams can be used for the detection of objects with small dimensions and, in particular, for the detection of transparent objects. The minimum object that can be detected is ≥ 0.
DS series 7.2. Instructions manual Measurement mode 7.2.1. Absolute mode (see functions 5 and 6 of Tab.1 at page 14) Provides the measurement of the dimension of the object beginning from an absolute reference. The first photoelement is taken as a reference (1) beginning from the connector side. The analog output voltage is proportional to the number of beams (obscured and not) included between the reference and last beam effectively obscured.
Instructions manual DS series 7.2.2. Relative measurement (see function 7 of Tab.1 at page 14) Provides the measurement of the dimension of the object that affects the detection area independently from an absolute reference. The voltage of the analog output is proportional to the number of beams effectively obscured. Fig. 11 can be used as an example, considering the previous hypothesis (one obscured beam corresponds to V OUT = 1V). The PNP output is active when at least one photoelement is obscured.
DS series 7.3. Instructions manual Detection mode (teach-in) The teach-in mode can be selected using the dip-switches (see functions 9 and 10 of Tab.1 at page 14) and is active only with one of these selections. This mode allows the memorisation of the dimension of one or more objects (not adjacent) by pressing the SET pushbutton. The PNP output is then switched on when the objects pass in the sensitive area.
Instructions manual DS series The following operating modes can be selected using the dip-switches: 7.3.1. Absolute detection (see function 9 of Tab.1 at page 14) The digital output (PNP) switches only if a certain object (dimensions previously memorised) passe s exactly in the desired position (Fig.13).
DS series Instructions manual 7.3.2. Relative detection (see function 10 of Tab.1 at page 14) The digital output (PNP) switches each time a certain object passe s inside the sensitive area, independently from its position in the area (Fig.14). The analog output in this configuration is always active and the voltage is proportional to the number of obscured optics (also non adjacent) independently from the real switching of the digital output (PNP) caused by the object detection.
Instructions manual DS series 7.4. DARK/LIGHT mode of the output (see function 13 and 14 of Tab.1 at page 14) Defines the status of the digital output (PNP) and of the relative yellow signalling LED. DARK MODE Object detection YES NO Output status OFF ON LED status Turned off Turned on Object detection YES NO LIGHT MODE Output status ON OFF LED status Turned on Turned off 7.5. Sensitivity mode (see f unctions 15÷18 of Tab.
DS series Instructions manual 8. DIAGNOSTIC FUNCTIONS 8.1. Visualisation of the device status The operator can verify the operating status of the DS3 device through three LEDs present on the receiver unit and one LED present on the emitter unit. The meaning of the LEDs present on the receiver unit (RX) depends on the functioning mode of the light grid. RECEIVER UNIT Signal Status - Normal device functioning. - Absence of the device after calibration. - Switching signalling fo the PNP output.
Instructions manual DS series 8.2. Fault and diagnostic messages The operator can verify the device functioning status and the stop or failure causes of the system, using the same LEDs used for the visualisation of the functions. 8.2.1. Diagnostic mode RECEIVER UNIT Signal Cause - No power supply. Check - Verify the power supply. - Device ready for teach-in detection; release the TEACH-IN button to memorise the object.
DS series 8.2.2. Instructions manual Error mode RECEIVER UNIT Signal Cause Check and Repair - PNP output does not switch. - Align the device again and inside the maximum operating - Device failure. distance. - Device not aligned or outside the maximum - Repeat the calibration procedure. operating distance. - Turn off and on the device; if the anomaly persists replace the unit. - PNP output switches.
Instructions manual DS series 9. CHECKS AND PERIODICAL MAINTENANCE The following is a list of recommended check and maintenance operations that should be periodically carried out by qualified personnel. Check that: • The dev ice has been calibrated, regularly repeating the calibration procedure (section 6 “Calibration procedure”). • The operating distance and alignment of the units conforms to the indications giv en in section 2 “Installation mode” and section 10 “Technical data”.
DS series Instructions manual 10. TECHNICAL DATA Power suppl y: Consumpti on of emitter unit (TX): Consumpti on of recei ver unit (RX): Outputs: Output c urrent on PNP output: Output voltage on PNP output: Response ti me: Light emission: Resolution of crossed beams: 24 Vdc ± 15% 100 mA max 100 mA max without load 1 PNP output; load max 10 kΩ 1 analog output ; 0-10V (∆Vmax.
Instructions manual DS series 11. LIST OF AVAILABLE MODELS 29 Response time of crossed beams Response time of parallel beams Model Length of sensitiv e area DS3-LD-015 155 155 24 23 msec 3 msec 0.6…1.5 DS3-LD-030 305 305 48 46 msec 6 msec 0.6…1.5 DS3-SD-015 155 155 24 23 msec 3 msec 0.2…0.6 DS3-SD-030 305 305 48 46 msec 6 msec 0.2…0.6 Length of N°.
DS series Instructions manual 12. OVERALL DIMENSIONS All the dimensions given are in mm.
