3M Touch Systems, Inc. Proprietary Information
– TSD-19-278
3M
™
MicroTouch
System SCT3
nnn
EX
Integration Guide
Systems SCT32nnEX
and SCT38nnEX
Read and understand all safety information
contained in this document before using this product.
Page 1: ...s Inc Proprietary Information TSD 19 278 3M MicroTouch System SCT3nnnEX Integration Guide Systems SCT32nnEX and SCT38nnEX Read and understand all safety information contained in this document before using this product ...
Page 2: ... and software are not specifically designed for use in medical devices as defined by United States federal law 3M Touch Systems Inc products and software should not be used in such applications without 3M Touch Systems Inc express written consent User should contact its sales representative if User s opportunity involves a medical device application IMPORTANT NOTICE TO PURCHASER Specifications are...
Page 3: ...Space 12 Identifying the Components 13 Testing the Display Video 13 Optional Power Supply for a Serial Controller 14 Summary of the Installation Procedure 14 Chapter 2 Sensor Design Considerations Design Considerations 15 Electrical Considerations 15 Mechanical Considerations 16 Touch System Location 19 Designing Software Applications 20 Chapter 3 Installing an SCT Touch Sensor Installation Consid...
Page 4: ... Bezel 30 Reconnecting the Bezel and Chassis 31 Chapter 4 Installing the 3M MicroTouch EX Series Controller Types of Controllers 33 Disassembling the Chassis 34 Mounting the Controller Internally 35 Completing Controller Mounting 36 Powering the Controller 37 Locating Power for the Controller 39 Modifying the Display for the Controller Cable 39 Installing Software 41 ...
Page 5: ...cations Privacy Film Option You may have purchased the privacy screen option In which case you know that Vikuiti Advanced Light Control Film ALCF is a simple highly effective way to help protect the security of your display screens and those who use them Vikuiti Advanced Light Control Film protects displayed information from a side view while not blurring or distorting on axis or direct view of sc...
Page 6: ...ing tasks Disassemble your display if necessary Mount the sensor to the display Install the touch controller WARNING To avoid the risk of electric shock which could result in serious injury or death You must be a qualified technician with experience in assembling and disassembling different types of displays You must know the specifics of your display and have access to its documentation There may...
Page 7: ...e a qualified technician with experience in assembling and disassembling different types of displays You must know the specifics of your display and have access to its documentation There may be hazardous voltages present in the display If you do not understand display electronics you may injure yourself damage the sensor or damage the touch controller To reduce the risk of fire and or explosion w...
Page 8: ...sure to lead Wear protective gloves while handling PCB components Important Notes for Video Displays When unplugging the power supply cord hold the plug do not pull by the cord Do not connect or disconnect this product during an electrical storm Remember to take into account that the operating temperature of the installation may be greater than the room ambient and consideration should be given to...
Page 9: ...roperty damage Follow all instructions and recommendations in the manufacturer s Material Safety Data Sheet and product label Be sure to follow solvent manufacturer s precautions and directions for use when using any solvents It is important to avoid using any caustic chemicals on the touch sensor Do not use any vinegar based solutions Apply the cleaner with a soft lint free cloth Avoid using grit...
Page 10: ...US Eastern Standard Time 9 a m to 5 p m throughout Europe You can contact 3M Touch Systems Inc Technical Support US only Eastern Standard Time by calling the hot line sending email or a fax Technical Support Hot Line 978 659 9200 Technical Support Fax 978 659 9400 Toll Free 1 866 407 6666 Option 3 Email US TS techsupport mmm com Contact 3M Touch Systems Contact information for all offices can be f...
Page 11: ...llation Refer to Supplies and Tools Needed for the Installation later in this chapter Set up a clean comfortable and spacious working area Having sufficient room to work makes the installation easier Test your display to ensure good working condition before you install the sensor Identify the different components to install and review the summary of the installation procedure It is important to kn...
Page 12: ...ptional Electrical tape or black acetate tape Felt tip marker pen Clean soft cloth and glass cleaner for the display and sensor Cable tie wraps Lead free solder RoHS compliant Replacement screws for mounting flat panel to bezel or chassis Ring lugs or crimps Nylon spacers and washers Sealing tape Flat closed cell foam single sided adhesive Mounting tape closed cell acrylic foam 3M VHB 4956 double ...
Page 13: ...ate for fastening screws taping etc Identifying the Components The following components are needed for a successful integration A SCT touch sensor An EX controller either USB or serial A USB cable 7319420 or serial cable 7310101 Software and technical documentation found on the http www 3m com touch Save the invoice shipping container and all packing material in case you need to transport the equi...
Page 14: ... are using a standard RS 232 serial cable P N 7310101 or a cased EX controller consult your applications engineer for power supply specifications For countries that use a 230 240 volt main system it may be necessary to purchase a power supply locally Details on the power requirements of the EX series controllers can be found in the EX Serial Controller Reference Guide available at http www 3m com ...
Page 15: ...SCT sensor is designed and produced without a backshield and takes advantage of the superior sensitivity and noise rejection of EX controllers Refer to the EX Controller Reference Guide for information on how to select signal frequency for best EMI rejection Electrical Considerations EMI and Shielding The front surfaces of displays carry potentials that fluctuate at the harmonics of display scan f...
Page 16: ...ors are more susceptible to stray capacitance changes when mechanical distortions are present Mechanical Considerations Tail Routing To minimize the risk of electromagnetic interference never run the sensor tail near or over the backlight inverter or power supply Although the tail is shielded the noise generated by an inverter is broadband and can contain frequencies close to the signal frequency ...
Page 17: ...ep tail bends away Make sure that all metal brackets are grounded Sealing Gasket to Bezel Single sided tapes adhered to the bezel make for easy sealing of the sensor Simply align and adhere the tape to the bezel edge Gaskets should contact the sensor perimeter to ensure a good seal without interfering with the viewing area Do not adhere the gasket to the sensor surface Attach sensor directly to LC...
Page 18: ...t is important to know the chemical compounds used in the formulation and to avoid chemically active corrosive and or recycled materials made from unknown ingredients Certain types of neoprene gaskets contain an excess of sulfur that makes them unacceptable for this purpose It is essential that the user evaluate this product to determine whether it is suitable for their particular purpose and meth...
Page 19: ...g physically contact the front or sides of the sensor This could be recognized as a touch In the design phase avoid metal bezels whenever possible If your current design has a metal bezel ensure that it does not directly contact the sensor The bezel should be appropriately grounded and very rigid Use insulating tape or gasketing as a spacer Be aware that some plastic bezels have conductive paint t...
Page 20: ...y and differing heights of users can cause parallax When designing your touch system software application use the following guidelines to help reduce the effects of parallax Design large buttons to facilitate touch Remember that a fingertip is much larger than a cursor Design larger active border areas for buttons For example if the button graphic is 1 inch x 1 inch the active touch area behind it...
Page 21: ... suitable for the user s intended application Installation Considerations Before beginning the installation review Chapter 2 Planning ahead ensures a successful installation To summarize Perform a bench test of the hardware to ensure functionality before you start Before installing the sensor be sure to account for the space needed by the sensor and its flex tail Ensure that the integration design...
Page 22: ...onal points Be careful not to place too much pressure may dent the privacy film To avoid scratching the privacy film do not remove protective film until you are about to assemble the system Remove protective liner by pulling gently Be aware that handling any polymer film can generate electrostatic charges that can attract dust and debris Remove any loose debris from the film by using compressed ai...
Page 23: ...e way in which the rear housing is attached to the display varies from model to model LCD display manufacturers may use screws quick release latches clips or release buttons 2 Lift off the rear housing to expose the display chassis Remove any screws holding optional accessories such as speakers or control buttons 3 Remove the screws that secure the chassis to the front bezel Carefully lift the cha...
Page 24: ... or the sensor cable Note When trimming the bezel make sure you do not compromise the mechanical integrity of the display 1 Place the bezel face down on an anti static pad Be sure to orient the top of the bezel closest to you 2 Place the sensor face down against the inside of the bezel opening Be sure to orient the sensor so the flex tail exits from the correct side of the bezel Refer to the mecha...
Page 25: ...tural integrity in the rest of the rib area Mounting the Sensor to the Display Before you begin this process please review the Mechanical Considerations Mounting Tape to the Display section in Chapter 2 for additional important information on this subject Note For ease of maintenance you might want to put a border of polyimide tape or a similar strength tape around the perimeter of the display in ...
Page 26: ...lms make sure the tape either polyimide tape or VHB tape does not touch the surface of the display Ensure that the tape is aligned with the frame of the display not in the viewing area The foam tape serves the following purposes Holds the sensor in place on the display Maintains a constant distance between the sensor and the display Cushions the display and glass surfaces Prevents dust and other c...
Page 27: ...the use of alcohol or other solvents which may result in minor or moderate injury or property damage Follow all instructions and recommendations in the manufacturer s Material Safety Data Sheet and product label Be sure to follow solvent manufacturer s precautions and directions for use when using any solvents It is important to avoid using any caustic chemicals on the touch sensor Do not use any ...
Page 28: ...the correct location 5 Attach the sensor to the viewable area of the display with one smooth motion Inspect the Mounted Touch Sensor After you mount the sensor to the display inspect your results carefully and check that the sensor is installed properly 1 Set the display in its standard upright position 2 Look at the front of the display and ensure the sensor flex tail exits from the correct locat...
Page 29: ...ns for use when using any solvents Follow manufacturer s directions for suitable chemicals for your display 3 Repeat the procedure for properly attaching the sensor to the display Adding a Sealing Gasket to the Bezel 1 Place the bezel face down on an anti static pad 2 Use a die cut gasket or cut strips of the closed cell compressible foam sealing gasket tape to fit the inside edges of the bezel op...
Page 30: ...orary post such as a cable tie wrap or toothpick in each bezel hole 2 Place an insulating nylon spacer over each temporary post The size of this spacer will compensate for the thickness added by the sealing gasket mounting tape and sensor The size of your spacer may be different to provide additional spacing and support 3 Align the screw holes or tabs over the temporary post Each LCD hole tab must...
Page 31: ...rews stop and loosen the screws Inspect the Attached Display and Bezel Once you attach the display and the bezel inspect your results as follows Check the front of the assembly for proper alignment and adjust if necessary Check that each bezel screw is seated properly and a little tighter than finger tight The screws should not be so tight that they add stress to the display If the bezel is warped...
Page 32: ... 3M MicroTouch System SCT3nnnEX Integration Guide 3M Touch Systems Inc Proprietary Information TSD 19 278 b Do not route the sensor flex tail near the backlight inverter or LED power supply of the display ...
Page 33: ...ounted the sensor to the front of the display For information on completing these procedures refer to Chapters 2 3 This chapter covers the following information Mounting the controller Supplying power to the controller Connecting the controller to the computer Types of Controllers There are different 3M MicroTouch controllers that can be used to operate your sensor The most common are the EX122 an...
Page 34: ... cable adapters Installation options Internal uncased or external cased EX112 series Communications protocol Serial RS232 Documentation EX Serial Controller Reference Guide 29087 Form factor 1 3 in 33 mm by 2 44 in 62 mm by 0 32 in 8 1 mm Sensors supported Standard SCT sensors Installation options Internal only EX111 series Communications protocol USB 1 1 Documentation EX USB Controller Reference ...
Page 35: ...roller and connect it to a sufficient power source following the instructions below for powering the controller either internally or externally Mounting the Controller Internally Mounting the controller inside the display housing results in a neater cleaner finish but requires internal space Before you begin make sure that there is sufficient room for the controller board inside the chassis Care m...
Page 36: ...ives to integrating the controller The following illustrates one mounting method that may work for some display products In order to mount the controller board to the housing two holes must be drilled 1 Mount the uncased controller board to the housing using two metal screws 2 Insert a 0 1 inch spacer between the controller board and the metal shield as shown in the following diagram These spacers...
Page 37: ...housing so that the sensor cable can be routed through however some models may have an existing opening that can be used With a sufficient opening the sensor cable can be fed through and the metal shield reattached Note If a hole is drilled in the metal shield to accommodate the sensor cable be sure to fold back the edges or install a grommet so that the cable does not fray on the sharp edges Note...
Page 38: ...o not use in conjunction with RS 232 Power Plug EX112 series Internal power option Power input location Two pin connector on controller board adjacent to sensor connector Connections 2 pin power Pin 1 GND RTN Pin 2 5VDC to 12VDC External power option Power input locations Auxiliary plug on the RS 232 connector of controller cable Connections None required Controller must be properly grounded throu...
Page 39: ... s voltage drop at the power source conduct the following test 1 Measure voltage across the power source contacts 2 Connect sensor to controller and controller to power source 3 Power up the display and allow it to warm up for at least 10 minutes 4 Measure voltage across the power source again The difference in voltages before and after the wires were connected cannot exceed 100 mV If this voltage...
Page 40: ...splay mounting for proper adjustment Make sure all wires are properly attached including the sensor s green wire to the chassis ground Check for video and power cables that originate inside the display If these cables exist be sure to thread them through the appropriate opening in the display cover These will be reconnected through the pedestal Note When routing the sensor flex tail through the me...
Page 41: ...computer When you install this software the correct driver for your system will automatically load 3M Touch Systems currently supports touch drivers for most Microsoft Windows and Linux operating systems These drivers as well as relevant technical documentation and legacy drivers can be found on the corporate website at http www 3m com touch After the software is installed restart your computer to...
