PMDX Optical Sensor User`s Manual Revision 0.4
Contents
1. Environmental Temperature 0 to 55 C Relative Humidity 20 to 80 relative humidity non condensing PMDX_Sensor_Manual_04 doc 2005 2006 Practical Micro Design Inc Page 8 of 9 15 May 2006 All Rights Reserved PMDX Optical Sensors User s Manual Document Revision 0 4 Appendix A Warranty Statement Practical Micro Design Inc PMD warrants that this hardware product is in good working condition according to its specifications at the time of shipment for a period of 90 days from the date it was shipped from PMD Should the product in PMD s opinion malfunction within the warranty period PMD will repair or replace the product without charge Any replaced parts become the property of PMD This warranty does not apply to the software component of a product or to a product which has been damaged due to accident misuse abuse improper installation usage not in accordance with product specifications and instructions natural or personal disaster or unauthorized alterations repairs or modifications Limitations All warranties for this product expressed or implied are limited to 90 days from the date of purchase and no warranties expressed or implied will apply after that period All warranties for this product expressed or implied shall extend only to the original purchaser The liability of Practical Micro Design Inc in respect of any defective product will be limited to the repair or replacement of su2. from 5 volts at less than 30 milli amperes e Screw clamp terminal connector e Slotted sensor has an open collector output allowing connection to 5 12 or 24 volt systems with an external pull up resistor e Reflective sensor has totem pole i e CMOS outputs for use with 5V systems only 1 4 Updates to this Manual Check the PMDX web site for revisions or updates to this manual http www pmdx com The latest revision of this manual is available on the PMD X Optical Sensors page follow the links from the main page 2 0 Installation and Operation These sensors are useful for mill or lathe spindle speed sensing and for lathe threading index position pickup W hile you may be able to use these sensors for limit or home switches they are not recommended for these applications because they have no protection against debris coolants or cutting oils N ote that all PMDX breakout boards have the necessary pull up resistor on board and have 5V power available to power the sensor so no external components are needed 5V DC power supply Output Signal Reflection O pen pulled to GND logic low Ground power supply return No reflection Obstructed floats open collector or driven high See sections Table 1 Connector Pin Out 2 2 and 2 3 for details Table 2 Output Signal Polarity 2 1 General Operating Constraints In order to achieve the maximum pulse rates given in the electrical specifications s
3. hole must be 6mm diameter or greater Warning The actual size of the interrupter opening depends on the speed of the interrupter material and how short a pulse the PC can detect The faster the device is moving and or the slower the PC the larger the hole needs to be in order for the PC or other hardware to recognize the output pulse from the sensor You may have to experiment to determine the exact size opening that your application requires 2 2 1 Slotted Sensor Output Signal The slotted sensor has an open collector output W hen the slot is open the output is pulled to ground W hen the slot is obstructed the output floats To obtain a valid logic level the output must have a resistor installed between the output signal and a power supply voltage Usually this is a resistor whose value is between 1 0K ohms and 10K ohms connected to a 5V power supply See section 4 0 for information on the maximum voltage that may be attached to the output signal 2 3 Reflective Sensor The reflective sensor uses IR modulation to further reduce interference from ambient light Note The reflective sensor is very sensitive to its own signal The ideal focal plane is 3 8 to 3 4 It is difficult to make objects closer than 1 4 be non reflective enough to not be detected Warning The actual size of the reflective strip or non reflective strip depends on the speed of the material the distance from the sensor to the material and how
4. moving parts that may be under remote control and may move unexpectedly This product may not be used in life support or other critical safety applications 1 2 Warranty Summary The PMDX Optical Sensors are warranted against failure due to defective parts or workmanship for 90 days from the date of sale Refer to Appendix A for complete warranty details If you have an item requiring service please see the support page on the PMDX web site http www pmdx com for return instructions The purchaser must pay shipping to return the unit to PMDX W e will ship the repaired unit back to you via ground transportation at our expense Repairs are normally completed within 10 business days See Appendix A for our complete warranty details PMDX_Sensor_Manual_04 doc 2005 2006 Practical Micro Design Inc Page 3 of 9 15 May 2006 All Rights Reserved PMDX Optical Sensors User s Manual Document Revision 0 4 1 3 Features The PMDX Optical Sensors has the following features e Built in signal conditioning circuitry e Output signal is conditioned to provide e Infrared emitter and detector with optical reliable indication of status i e no linear filters to block visible ambient light region the output is an ON or OFF logic signal only e Reflective sensor uses modulation to further reduce interference from ambient e Direct connection to PMD X 120 PMDX light 121 PMD X 122 PMD X 131 and most other breakout boards e Powered
5. PMDX Optical Sensors User s Manual Document Revision 0 4 Date 15 May 2006 PMDX W eb http www pmdx com 7432 Alban Station Blvd A105 Phone 1 703 912 4991 Springfield VA 22150 2321 USA FAX 1 703 912 5849 PMDX_Sensor_Manual_04 doc 2005 2006 Practical Micro Design Inc Page 1 of 9 15 May 2006 All Rights Reserved PMDX Optical Sensors User s Manual Document Revision 0 4 Table of Contents LO e VW UE 3 1 1 Important Safety Information 3 1 27 Warranty SUIMMALY ESA dE EE 3 UE SE 4 LA Updates to this Manuel ENEE EE AE 4 2 0 Installation ANd OperatiOn s s ssnsusunnunnnnnnonnunnnnunnnnnnnnnnnnnnunnnnnnnnnnnnnn ennn nannnnnnnnn nnnm nnmnnn nnmnnn 4 2 1 General O perating Constraints AEN 4 22 Slotted SENSO nne ENEE AE ENEE ENEE E 5 2 2 1 Slotted Sensor O utput SloMal iinn aa aa 5 23 Reflective E 5 2 3 1 Reflective Sensor O utput Gong EEN EE EEN 5 3 0 Mechanical Specifications s sussnsnnonnunennununnunnnnnnnnnunnnnunnnnnnnnnnnnn nunnunum nnnnnnnn nnen nenn nnen nananana na 6 4 0 Electrical and Environmental Specifications s s ssusussunennununnununnunnnnnnnnnnnnnnunnnnnnnnnnnnnn nnmnnn nnn 8 Appendix A Warranty ssssssssseneunensunnnnnnnnnunnnnunnnnunnnnnnnnnnnnn nunnunum nnmnnn nenn nnannannnnnn nnmnnn nanen nananman nannan nna 9 PMDX_Sensor_Manual_04 doc 2005 2006 Practical Micro Design Inc Page 2 of 9 15 May 2006 All Rights Reserved PMDX Optical Sensors User
6. ch product Practical Micro Design Inc may use new or equivalent to new replacement parts Practical Micro Design Inc makes no other representations or warranties as to fitness for purpose merchantability or otherwise in respect of the product No other representations warranties or conditions shall be implied by statute or otherwise In no event shall Practical Micro Design Inc be responsible or liable for any damages arising a from the use of the product b from the loss of use of the product c from the loss of revenue or profit resulting from the use of the product or d as a result of any event circumstance action or abuse beyond the control of Practical Micro Design Inc whether such damages be direct indirect consequential special or otherwise and whether such damages are incurred by the person to whom this warranty extends or a third party PMDX_Sensor_Manual_04 doc 2005 2006 Practical Micro Design Inc Page 9 of 9 15 May 2006 All Rights Reserved
7. ection 4 0 the interrupter or non reflective portion must be between 25 and 75 of the overall duty cycle For operation below these maximum pulse rates smaller interrupter widths can be used The exact width required for the interrupter or non reflective portion depends on many factors including the interface electronics and control software For example a large value pull up resistor will slow the response time of the sensor Also the time it takes the control software to read the output of the sensor will limit the maximum pulse rate The bottom line is that in general you should experiment with your setup to determine the maximum operational limits PMDX_Sensor_Manual_04 doc 2005 2006 Practical Micro Design Inc Page 4 of 9 15 May 2006 All Rights Reserved PMDX Optical Sensors User s Manual Document Revision 0 4 2 2 Slotted Sensor Two types of interrupters can be used with the slotted optical sensor a flag style or a solid with an opening style The flag style uses a small flag or tooth shape protrusion to interrupt the LED Sensor path at the reference position The solid style uses a solid interrupter that has an opening of some kind at the reference position W hen using a solid interrupter with an opening at the reference point the opening must extend a minimum of 3mm above and 3mm below the center line of the LED Sensor path see Figure 1 on page 6 Therefore if you are using around hole the
8. ich can cause shorts coming in contact with the board PMDX_Sensor_Manual_04 doc 2005 2006 Practical Micro Design Inc Page 6 of 9 15 May 2006 All Rights Reserved PMDX Optical Sensors User s Manual Document Revision 0 4 19mm 20mm Ka max W m O Top View 7 1mm v 3mm SC 9mm Side View 3 30 e 1mm Wire inserts here o 15 6mm Bottom View max je 1 4mm dia pin Figure 2 PMDX Sensor R Dimensions WARNING The PMDX SersorR should be protected from liquids dirt or chips especially metal chips which can cause shorts coming in contact with the board PMDX_Sensor_Manual_04 doc 2005 2006 Practical Micro Design Inc Page 7 of 9 15 May 2006 All Rights Reserved PMDX Optical Sensors User s Manual Document Revision 0 4 4 0 Electrical and Environmental Specifications Power Su i 5V VDC input 30 mA maximum Output PMD X Sensor SG O pen collector output Max output low 0 3V sinking up to 4mA Max output high pull up resistor to 24V maximum PMD X Sensor R Totem pole CMO S output Max output low 0 3V sinking up to 4mA Min output high d IV sourcing up to 4mA Pulse Rate Reflective Sensor in excess of 400 Hz 24 000 RPM Slotted Sensor in excess 2000 Hz 120 000 RPM NOTE See also section 2 1 for more information RPM is based on single pulse per revolution of the spindle
9. s Manual Document Revision 0 4 1 0 Overview This document describes the configuration and operation of the PMD X Optical Sensors The PMD X O ptical Sensors are useful for mill or lathe spindle speed sensing and for lathe threading index position pickup This document pertains to the following versions of the PMD X Optical Sensors PMD X Sensor Part Numbers PMD X Sensor S slotted PMD X Sensor R reflective 1 1 Important Safety Information The PMDX Optical Sensors are intended for integration by the purchaser into industrial control systems It is solely the purchaser s responsibility to assure that the system is configured in a manner consistent with applicable safety requirements Practical Micro Design Inc does not control how these parts are integrated into the purchaser s system and cannot be responsible for guaranteeing the safety of your system The PMDX O ptical Sensors are not intended for limit or home switch applications because they have no protection against debris coolants or cutting oils The PMDX Optical Sensors are not guaranteed to be fail safe The system into which the PMDX O ptical Sensors are installed should provide fail safe protection and emergency stop capability Automated machine tools into which the PMD X O ptical Sensors may be integrated can cause injury Precautions should be taken to assure that operators are trained in their proper operation and safety procedures and that they are protected from
10. short a pulse the PC can detect The faster the device is moving and or the slower the PC the larger the strip needs to be in order for the PC or other hardware to recognize the output pulse from the sensor You may have to experiment to determine the exact size strip that your application requires 2 3 1 Reflective Sensor Output Signal The reflective sensor has a totem pole CMO S style output W hen the sensor sees the reflected signal the output is pulled to ground W hen the sensor sees no reflection the output is driven close to 5 volts See section 4 0 for information on the output signal voltages Warning The reflective sensor has a totem pole i e CMO S style output and must only be connected to 5V systems PMDX_Sensor_Manual_04 doc 2005 2006 Practical Micro Design Inc Page 5 of 9 15 May 2006 All Rights Reserved PMDX Optical Sensors User s Manual Document Revision 0 4 3 0 Mechanical Specifications 19mm I 34mm gt max Top View Center line of LED detector Terminal Block Center line of LED detector NOTE If using a slot or hole in the interruptor the opening must extend a minimum of 3mm above amp below this center line i e 6mm diameter hole Side View 15 6mm Bottom View max 4 2mm dia through hole Figure 1 PMDX Sensor S Dimensions WARNING The PMDX Sensor S should be protected from liquids dirt or chips especially metal chips wh
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