8501004C TT239-0600 User Manual
Contents
1. 11239 Configuration Software File Help Communication Setup 1 0 Config Test Calibration DEVICE SELECT Device f7235 06n0 0000001 _ 7 Model Serial Number Manufacturer Status Select device then click open ES File Help Communication Setup 10 Config Test Calibration DEVICE SELECT Dewce rzs eso Model TT239 0600 Serial Number 0000001 Manufacturer Acromag Inc Status Device opened successfully Reset Device Acromag Inc Tel 248 295 0880 2 Wire Isolated Frequency Transmitter w USB NOTE You should already have power connected to the transmitter After executing the Acromag Configuration software for this transmitter the window shown at left will appear if you have not already connected to the transmitter via USB note fields are blank under these conditions Connect your PC to the transmitter via USB and the transmitter s model serial information will appear in the device field as shown in the second window at left If you happen to be connected to more than one transmitter via a USB hub you can use the device scroll field to select another transmitter using the serial information suffix of the model number to discern one transmitter from another Select a transmitter from the drop down menu When you click on a transmitter name from the d2. ENABLE eH H LOGIC LEVEL Tel PULL DWN _ apts GROUND L ENABLE FNABLE pe HIGH SIDE SWITCH oy Open Collector Drain UNIPOLAR f SHIELDED BIPOLAR _ 1B CABLE kor S ENABLE eH LOGIC LEVEL fic PULL UP Sere age a SEE NOTE eRounD L I NOTE This ground connection is recommended for best results If sensors are inherently connected to ground use caution and avoid making additional ground connections which could generate ground loops and measurement error REFERENCE Bipolar mode for zero crossing signals e Unipolar mode for non zero crossing signals e internal 12 4KQ pull up resistor to 4VDC with 28mV hysteresis or 3VDC with 84mV hysteresis e internal 1KQ pull down resistor to FRTN Acromag Inc Tel 248 295 0880 2 Wire Isolated Frequency Transmitter w USB ENABLE INPUT MODE PULL DWN L ENABLE INPUT MODE LOGIC LEVEL PULL UP a PULL DWN ENABLE INPUT MODE UNIPOLAR f BIPOLAR ENABLE LOGIC LEVEL PULL DWN L ENABLE INPUT MODE UNIPOLAR f BIPOLAR ENABLE LOGIC LEVEL PULL DWN L OPTIONAL SHIELD GROUND L SOURCING PROXIMITY SENSOR SHIELDED OPTIONAL SHIELD GROUND L LOW SIDE SWITCH Open Collector Drain TB1 ET 19 EHe SHIELDED OPTIONAL SHIELD GROUND L DRY CONTACT SHIELDED OPTIONAL SHIELD GROUND L L http www acromag com Model TT239 0600 Output Power Connections 2 Wire Iso
3. Frequency Configuration Software reports Timeout Errors USB connection between Exit and restart the Configuration Software to allow host PC and transmitter the USB to re enumerate the transmitter became unsynchronized Acromag s Application Engineers can provide further technical assistance if required Repair Service amp Repair Assistance This transmitter contains solid state components and requires no maintenance except for periodic cleaning and transmitter calibration and verification zero and full scale Its enclosure is not meant to be opened for access and can be damaged easily if snapped apart It is highly recommended that a non functioning transmitter be returned to Acromag for repair or replacement Acromag has automated test equipment that thoroughly checks and calibrates the performance of each transmitter and can restore firmware Please refer to Acromag s Service Policy and Warranty Bulletins or contact Acromag for complete details on how to obtain repair or replacement Acromag Inc Tel 248 295 0880 24 http www acromag com Model TT239 0600 ACCESSORIES 2 Wire Isolated Frequency Transmitter w USB Software Interface Package USB Isolator USB A B Cable USB A mini B Cable Software Interface Package Configuration Kit Order TTC SIP e USB Signal Isolator e USB A B Cable 4001 112 e USB A mini B Cable 4001 113 e Configuration Software CDROM 5040 944 This kit contains all
4. Input OHz Cutoff Output Update Loop Capture reached No if Output Yes Update Yes reached first Reset OHz Set Calculate result based on Cutoff Measurement Cumulative Moving Average Timer to OHz or Capture Count and add to FIFO Queue No Jsing Yes Set Technique A Measurement to FIFO Queue Running Average Increment Calculate time Reset Capture Keep CMA Capture between last Counen if no Input Count capture and add to Curaulative Capture Cumulative Moving Moving Average since Average CMA previous Output Update Update Output based on scaled Measurement Using Technique A Switch to Frequency gt Technique B 6 5KHz Switch to Frequency lt Technique A 6KHz Acromag Inc Tel 248 295 0880 22 http www acromag com Model TT239 0600 2 Wire Isolated Frequency Transmitter w USB Measurement Techniques This transmitter utilizes one of two measurement techniques at any given time to measure the input frequency and switches dynamically between the two measurement techniques as needed to maximize system performance These two measurement techniques are referred to as Technique A and B as listed in the Flow Chart on the previous page Technique A For measuring input frequencies less than 6500Hz This measurement technique uses the input capture as a gate and counts the number of system clock cycles 6MHz between two input captures The nature of this method results in
5. Also set the input range Full Scale 20mA You can optionally swap O Scaling values to configure a reverse acting output response if desired Note Under range 3 6mA and over range 24mA is built into the output range by design If the I O Scaling Zero Scale and Full Scale points are chosen too close together performance will be degraded Submit I O Configurations Once you have made your configuration selections click the Send I O Config button to write them to the transmitter You can read the status of your sent message in the Status field Alternately you could select Save As from the upper left hand File menu to save the configuration settings to a file on your PC for later reference At this point you can verify the transmitter s operation by clicking on the Start Polling button of the TEST I O Section of the page to trigger the software to periodically read the transmitter s input measurement and display its value in the field to the right of the polling toggle button Note the simulated LED next to the button flashes each time the input is sampled Click Stop Polling to stop polling the input The Restore Factory Calibration button resets transmitter and causes it to revert to its factory calibration without effecting user configuration Useful if there was an error during recalibration that degraded performance or the I O channel appears erratic The Restore Factory Default button restores a
6. CONFIGURE I O Get I O Config a TT239 Configuration Software File Help Communication Setup 1 0 Config Test Calibration CALIBRATION Output Output Cal Instructions FACTORY SETTINGS Restore Factory Calibration Restore to Factory Default CALIBRATION STATUS No Device Connected HELP You can press F1 for Help on a selected or highlighted field or control You can also click the button in the upper right hand corner of the window and click to point to a field or control to get a Help message pertaining to the item you pointed to Acromag Inc Tel 248 295 0880 2 Wire Isolated Frequency Transmitter w USB I O Test Optional Verify Transmitter Operation Here After making I O configuration changes use the I O Test controls to verify the transmitter s operation Click Start Polling to periodically read the input channel and validate its operation Click Stop Polling to stop polling the input channel For detailed configuration and calibration procedures see the Operation Step By Step section of the Technical Reference of this manual Calibration Calibrate the Output if Needed This transmitter has already been factory calibrated If you encounter excessive error you can click the Calibration tab to display the Calibration control page as shown at left For output zero scale endpoint adjustment click the Zero Scal
7. below the Cutoff Frequency the transmitter will measure OHz NOTE Once the Cutoff Frequency is reached the transmitter will retain the last measurement and will wait a specified duration before measuring OHz This duration is equal to the period of the Cutoff Frequency f no input is captured within this duration the transmitter will measure OHz For example a 0 25Hz Cutoff Frequency would configure the transmitter to wait 4 seconds before measuring OHz Enter the number of Samples to Average This transmitter captures and saves samples in a FIFO first in first out queue The number of samples in this queue is equal to the number of Samples to Average The FIFO queue is used to calculate a running average Samples are added to the FIFO queue at the Output Update rate NOTE It is often useful when measuring a gear using a magnetic pickup to set the number of Samples to Average equal to the number of teeth on the gear Using this technique variations in gear teeth spacing will be averaged over one revolution yielding a constant frequency measurement Enter the Debounce The Debounce time controls the length of time the transmitter will wait until the input signal is steady not crossing threshold before measuring the input signal NOTE Debounce is useful for filtering out temporary signal glitches such as those generated by contact relays For best results set the Debounce to twice the expected duration of contact bounc
8. ready to install it in the field as the transmitter has already been factory calibrated If you later encounter error that is out of specification you can click the Calibration tab to display the Calibration control page shown at left CALIBRATION Output IMPORTANT This transmitter has already been factory calibrated with a high level of precision If you attempt to recalibrate the output channel you could degrade its performance if it is not done properly or it is done using lower grade equipment Consider your decision to recalibrate carefully Before attempting to recalibrate the output channel make sure you write your selections to the transmitter by clicking the Send I O Config button Click the Output Cal Instructions button to begin output calibration and enable the Output Zero Scale and Full Scale buttons For output zero scale endpoint adjustment click the Zero Scale button to open the zero scale configuration pop up Use a current meter or digital volt meter to accurately measure the transmitter output current and enter the measurement in the input field provided Click the Submit Measurement button to send the calibration to the transmitter For output full scale endpoint adjustment click the Full Scale button to open the full scale configuration pop up Use a current meter or digital volt meter to accurately measure the transmitter output current and enter the measurement in the input field p
9. than or equal to 75VDC or 50VAC 2 Wire Isolated Frequency Transmitter w USB Hy Us lt O z J zz ES J 114 5 4 51 D A e S 4 O O O i DIMENSIONS ARE IN MILLIMETERS INCHES DIN Rail Mounting amp Removal Acromag Inc Tel 248 295 0880 Refer to the following figure for mounting and removing a module from the DIN rail Mounting A spring loaded DIN clip is located on the input side bottom The rounded edge of the output side bottom allows the module to tilt upward so that it may be lifted from the rail when prying the spring clip back with a screwdriver To attach a module to T type DIN rail angle the top of the module towards the rail and place the top groove of the module over the upper lip of the DIN rail Firmly push the module downward towards the rail until it snaps into place Removal To remove a module from the DIN rail first separate the input terminal blocks from the bottom side of the module to create a clearance to the DIN mounting area A screwdriver can be used to pry the pluggable terminals out of their sockets While holding the module in place from above insert a screwdriver into the lower path of the bottom of the module to the DIN rail clip and use it as a lever to force the DIN rail soring clip down while pulling the bottom of the module outward until it disengages from the rail Tilt the module upward to lift it from the rail 5 http www acrom
10. the output is PE E E ET A updated sample window cet o e Enter the O Scaling Specify the input frequencies to correspond to Zero Scale and Full Scale Clk Start Poling to poll the input and display ts ae e Submit the configuration settings to the transmitter by clicking the iaiia akakaa akada Send I O Config button to write the settings to the non volatile EEPROM memory Acromag Inc Tel 248 295 0880 13 http www acromag com Model TT239 0600 Quick Overview Input Options Threshold Bipolar 0 0 25m Hys Measurement Frequency x RA Do not exceed 15V at input Pull Up Down Disabled with Pull Up Down enabled Sampling Options Cutoff Frequency 0 010 Hz Debounce 0 al ms Samples to Average 1 Output Options Output Update Override Update output immediately Output Update 100 14 ms Sample Window when OHz is bounded by Cutoff Frequency I O Scaling 0 000 Hz 4m4 Out 10000 000 Hz 20m Out Status To preserve Configuration changes save to a file or send to a device Send I O Config TEST 1 0 Start Polling Frequency Hz Click Start Polling to poll the input and display its value The LED next to the button will flash when polling is active Click Stop Polling to discontinue polling the input ie e 11239 Configuration Software ed a e File Help Communication Setup I O Config Test Calibration
11. this product has typically been tested to comply with higher standards in some cases Operating Temperature 40 C to 80 C 40 F to 176 F Storage Temperature 40 C to 85 C 40 F to 185 F Relative Humidity 5 to 95 non condensing Isolation Input USB output power circuits are isolated from each other for common mode voltages up to 250VAC or 354V DC off DC power ground ona continuous basis will withstand 1500VAC dielectric strength test for one minute without breakdown Complies with test requirements of ANSI ISA 82 01 1988 for voltage rating specified Installation Category Suitable for installation in a Pollution Degree 2 environment with an Installation Category Over voltage Category II rating per IEC 1010 1 1990 Shock amp Vibration Immunity Conforms to IEC 60068 2 6 10 500 Hz 4G 2 Hours axis for sinusoidal vibration IEC 60068 2 64 10 500 Hz 4G rms 2 Hours axis for random vibration and IEC 60068 2 27 25G 11ms half sine 18 shocks at 6 orientations for mechanical shock Electromagnetic Compatibility EMC Minimum Immunity per BS EN 61000 6 1 Electrostatic Discharge Immunity ESD per IEC 61000 4 2 Radiated Field Immunity RFI per IEC 61000 4 3 Electrical Fast Transient Immunity EFT per IEC 61000 4 4 Surge Immunity per IEC 61000 4 5 Conducted RF Immunity CRF per IEC 61000 4 6 Class B Product with Emissions per BS EN 61000 6 3 1 Enclosure Port per CISPR 16 2 Low Voltage AC M
12. to 3 6mA and over range capability up to 24mA The output signal is linear with respect to the measured frequency or duty cycle Output Ripple Noise Less than 0 1 of output span Note High Speed Acquisition Additional filtering at the load is recommended for sensitive applications with high speed acquisition rates High frequency noise is often reduced or eliminated by placing a 0 1uF capacitor directly across the load For excessive 60Hz supply ripple with current output a 1uF or larger bulk capacitor is recommended at the load Output Ambient Temperature Drift Includes the combined effects of zero and span drift over temperature and is better than 20ppm C 0 0020 C over the ambient temperature range for reference test conditions see Input Specifications Output Power Supply This device is output loop powered from 12 32VDC SELV Safety Extra Low Voltage 24mA maximum The supply voltage across the transmitter must never exceed 36V even with a shorted load The supply voltage level must be chosen to provide a minimum of full scale current to the load 0 020 R typical plus 12V minimum to the transmitter terminals plus any line drop Ideally the supply should be able to drive over scale current levels up to 24mA into the load Reverse polarity protection is inherent as output terminals are not polarized The output polarity labels on the enclosure are for reference only CAUTION Do not exceed 36VDC peak to avoid damag
13. to Signal Ground via ferrite bead SHLD Signal Ground Connects directly to Signal Ground Note Most Host Personal Computers except battery powered laptops will connect earth ground to the USB shield and signal ground Cable Length Connection Distance 5 0 meters maximum Driver No special drivers required Uses the built in USB Human Interface Device HID drivers of the Windows Operating System Windows XP or later versions only http www acromag com Model TT239 0600 Enclosure amp Physical Environmental 2 Wire Isolated Frequency Transmitter w USB General purpose plastic enclosure for mounting on 35mm T type DIN rail Dimensions Width 12 5mm 0 5 inches Length 114 5mm 4 51 inches Depth 99 0mm 3 90 inches Refer to Mechanical Dimensions drawing I O Connectors Removable plug in type terminal blocks rated for 12A 250V AWG 26 12 stranded or solid copper wire Program Connector USB Mini B type 5 pin See USB Interface Case Material Self extinguishing polyamide UL94 V O rated color light gray General purpose NEMA Type 1 enclosure Circuit Board Military grade fire retardant epoxy glass per IPC 4101 98 DIN Rail Mounting Transmitter is normally mounted to 35x15mm T type DIN rails Refer to the DIN Rail Mounting amp Removal section for more details Shipping Weight 0 5 pounds 0 22 Kg packed These limits represent the minimum requirements of the applicable standard but
14. 6 AIUD ANE E E EEE AE E A E R EAEE A E A EE A A E 26 OUMU eao E sonncdseueassvecuatecunesetee 29 USB RECT ACC minci a a 30 Enclosure amp Physical iesen a a a 31 Environmental ise E EAE TEE ES 31 Agenc V AD DU OVAIS aroa E T E E E E S 32 Reliability Prediction soricina osseideeetedened 32 CONTIBULATION COntrolS acesi E A aa 32 REVISION HISTORY ccccsecisscccecsiacasacescsestecieccsacerecesescnacietaivecarneaveseeerasis OS All trademarks are the property of their respective owners IMPORTANT SAFETY CONSIDERATIONS It is very important for the user to consider the possible adverse effects of power wiring component sensor or software failures in designing any type of control or monitoring system This is especially important where economic property loss or human life is involved It is important that the user employ satisfactory overall system design It is agreed between the Buyer and Acromag that this is the Buyer s responsibility The information of this manual may change without notice Acromag Inc makes no warranty of any kind with regard to this material including but not limited to the implied warranties of merchantability and fitness for a particular purpose Further Acromag Inc assumes no responsibility for any errors that may appear in this manual and makes no commitment to update or keep current the information contained in this manual No part of this manual may be copied or reproduced in any form without the prior written c
15. 880 27 http www acromag com Model TT239 0600 2 Wire Isolated Frequency Transmitter w USB Input Input Range Resolution and Measurement Accuracy Per Input Range Input Range Input Carrier input Duty Cycle Resolution Accuracy Frequency OHz to 100Hz to 99 1 part in 60000 0 02 OHz to 1000Hz 10 to 90 1 part in 6000 OHz to 3000Hz 20 to 80 1 part in 1200 Input Minimum Pulse Width Duty Cycle Measurement Input Minimum Pulse Width Per Signal Configuration amp Input Range Unipolar Configuration Bipolar Configuration Input Range 28mV Hys 84mV Hys 28mV Hys 84mV Hys OHz to 20KHz tons ous Sus f ams 3us Sus 20KHz to 100KHz Aus Input Overvoltage Protection Bipolar Transient Voltage Suppressers TVS 220V clamp level typical Also includes differential input diode clamping capacitive filtering and series resistance Input Filter Bandwidth 3dB at 35KHz typical Noise Rejection Common Mode 92dB 60 Hz typical with 100Q input unbalance Noise Rejection Normal Mode Not Applicable Input Zero and Full Scale Adjustment Input range endpoints are selectable over the full input range OHz to 100KHz Input Zero and Full Scale selections will be mapped to the output zero 4mA 0 and full scale 20mA 100 endpoints Configuration supports normal or reverse acting operation i e Input OHz to 2000Hz or Input 2000Hz to OHz Zero Scale Adjust Adjustable over 0 to 90 of Full Scal
16. L 3 WIRE POWER FORM A SOURCING OUTPUT RELATIVE TO THE REMOTE SINKING LOAD Earth Ground Connections The transmitter housing is plastic and does not require an earth ground connection except where the optional input cable shield is terminated on the transmitter If the transmitter is mounted in a metal enclosure an earth ground wire connection to the metal enclosure s ground terminal green screw is usually required using suitable wire per applicable codes See the Output Power Wiring Drawing for Output Power connections and note the traditional position of earth ground for the two wire output current loop Earth ground is normally applied at the output loop power minus terminal and in common with the loop load or loop receiver minus The Type Il transmitter output terminals have a floating connection relative to earth ground and their potential varies with the voltage drop in the load and connection wire e Respect the traditional position of earth ground in a two wire current loop and avoid inadvertent connections to earth ground at other points in the output circuit which would drive ground loops and negatively affect operation The input circuit is isolated and may additionally be earth grounded e A USB isolator is recommended when configuring or calibrating a transmitter to avoid the ground loop that occurs if the input sensor is also earth grounded PC USB ports are commonly earth grounded and make contact with both the USB sign
17. NSTINEXISES ARET checking your wiring and reviewing This indicates that either Check the input signal with respect to its range and this information or if other the input signal is out of reduce or increase it as required to drive the output evidence points to another range or asensor lead within its linear operating range A fully Over Range problem with the transmitter an has broken It can also or Under Range signal can be driven by a sensor effective and convenient fault occur due to contention fault such as an open or broken sensor lead If USB diagnosis method is to exchange between earth ground at is not isolated check for a ground loop between a the questionable transmitter with the PC USB port andthe grounded sensor and earth ground of the PC USB a known good transmitter input sensor port Cannot Measure Input Signal Input may be wired Input signal should be wired to TB1 at terminals 1 incorrectly to the input and 2 Observe proper polarity terminals services are also available from Acromag Input signal may not be Check that the input signal crosses the selected l crossing Threshold Threshold Input signal may contain Set Debounce to Oms or make sure the duration of glitches that are glitches on the input signal does not exceed the triggering the Debounce Debounce time Input frequency may be Check that the frequency of the input signal is below the Cutoff greater than the configured Cutoff Frequency
18. ODEL NO USB ISOLATOR REQUIRED 1 ea Configuration Software CDROM 5040 944 WARNING The intent of mating USB with this transmitter is so that it can be conveniently configured and calibrated in a safe area then installed in the field which may be in a hazardous area Do not attempt to connect a PC or laptop to this transmitter while installed in a hazardous area as USB energy levels could ignite explosive gases or particles in the air e USB Signal Isolation is Required See Below Acromag model USB ISOLATOR may be used to isolate the USB port or optionally another USB signal isolator that supports USB Full Soeed operation 12Mbps e Configuration Requires USB and Loop Power This transmitter draws power from both the current loop and from USB during setup IMPORTANT USB logic signals to the transmitter are referenced to the potential of the transmitter s input ground This ground is held in common with USB ground and USB cable shield ground The potential of the transmitter s current output pin output minus relative to earth ground will vary according to the load current and load resistance net IR drop Without isolation this IR drop would drive a potential difference between the normally grounded current loop and the grounded USB connection at the PC causing a ground loop that would inhibit setup and calibration and may even damage the transmitter This is why an isolated USB connection is recommended The u
19. OP POWERED ty iad SHIELDED 4 20mA 73 zD ES TWISTED PAIR INPUT OUTPUT HEJ Nboccoood DC SUPPLY J 12 32V Fim ISS j oa ANY MODEL TT2XX 0600 z TB4 INPUT common H LoaD L SG NOTE OUTPUT TERMINALS ARE NOT POLARIZED AND PLUS amp MINUS LABELS ARE FOR REFERENCE ONLY OPTIONAL WIRING TERMINALS C ARE HELD IN COMMON AND USED FOR SOURCING LOOP WIRING SEE OPTIONAL OUTPUT WIRING DIAGRAM The traditional loop powered sinking output connections are shown above Shielded twisted pair wiring is often used at the output to connect the longest distance between the field transmitter and the remote receiver as shown The output of this transmitter fluctuates relative to earth ground by the voltage drop in the load and connection wire This makes it flexible in the way it connects to various Receiver devices Acromag Inc Tel 248 295 0880 9 http www acromag com Model TT239 0600 2 Wire Isolated Frequency Transmitter w USB Output Power In most installations the loop power supply will be local to either the transmitter or local to the remote receiver Common receiver devices include the input channel Connections of a Programmable Logic Controller PLC a Distributed Control System DCS ora panel meter Some receivers already provide excitation for the transmitter loop and these are referred to as sourcing inputs Other receivers that do not provide the excitation are r
20. USB Programmable DIN Rail Mount Thin Transmitter Model TT239 0600 Acroma THE LEADER IN INDUSTRIAL I O g Isolated 2 Wire Transmitter Frequency PWM Pulse Input 4 20mA Output USER S MANUAL ACROMAG INCORPORATED 30765 South Wixom Road P O BOX 437 a oe seoueren A aferg i LOSS eure e tos lt O s SUF EC LOU s Oe ees 6oee 4 eRe oe wae S Tore 2 MAMA MA onus eae s eUe ee se rx Tel 248 295 0880 Fax 248 624 9234 email sales acromag com Wixom MI 48393 7037 U S A Copyright 2013 Acromag Inc Printed in the USA Data and specifications are subject to change without notice 8501 004C Model TT239 0600 Table of Contents 2 Wire Isolated Frequency Transmitter w USB GETTING STARTED DESCRIPTION cenne EE escsaneseecusoesscesestssesseuesateuencsesesaneseecusossseeses 4 KoV FC AMUN CS ienie E EE E E A E E oesensesteeoses 4 ADPIC O eiai E E E E EE 4 Mechanical Dimensions ssesessesesessesessecescesescecescecesseoessscecssoecescecescesesoscesoecesescessscoesesoeseeoeoe 5 DIN Rail Mounting amp Removal ssesessssesessecessecessecesssoecsscesssoecescecesoesesoecesoecesescesseoecesoesseoeoe 5 ELECTRICAL CONNECTIONS ssssssssoossssssssssssesssssssssssssssossssesssssseesosssssssoo 6 Sensor MPUECONnNECHONS vesmvirissroinnisr trinon r Ee ENEE CENENE CENERE Ea 7 O tput Power Connections ssossesuropissersndn E a O aa 9 Earth Ground Connection
21. ag com Model TT239 0600 2 Wire Isolated Frequency Transmitter w USB TT2XX MODULE DIN RAIL MOUNTING AND REMOVAL TILT MODULE UPWARD TOWARDS RAIL AND HOOK ONTO UPPER LIP OF RAIL ROTATE MODULE DOWNWARD TO ENGAGE SPRING OUTPUT SIDE CLIP ONTO LOWER LIP OF RAIL TOP W H H oe A a e Ne 35mm DIN Rail TT2XX MODULE eT O SPRING CLIP O L CAU UHA oan 4 INPUT SIDE SCREWDRIVER SLOT FOR REMOVAL FROM T TYPE DIN RAIL USE SCREWDRIVER TO REMOVE MODULE FROM RAIL AS SHOWN ELECTRICAL CONNECTIONS Wire terminals can accommodate 12 26 AWG solid or stranded wire Input wiring may be shielded or unshielded type Ideally output wires should be twisted pair Terminals are pluggable and can be removed from their sockets by prying outward from the top with a flat head screwdriver blade Strip back wire insulation 0 25 inch on each lead and insert the wire ends into the cage clamp connector of the terminal block Use a screwdriver to tighten the screw by turning it in a clockwise direction to secure the wire 0 5 0 6Nm torque Since common mode voltages can exist on signal wiring adequate wire insulation should be used and proper wiring practices followed As a rule output wires are normally separated from input wiring for safety as well as for low noise pickup Acromag Inc Tel 248 295 0880 6 http www acromag com Model TT239 0600 Sensor Input Connections NOTE Since common mode voltages can exis
22. ains Port per CISPR 14 16 3 DC Power Port per CISPR 16 4 Telecom Network Port per CISPR 22 ae ta Acromag Inc Tel 248 295 0880 31 http www acromag com Model TT239 0600 2 Wire Isolated Frequency Transmitter w USB Agency Approvals Safety Approvals Pending UL Listed USA amp Canada Hazardous Locations Class Division 2 Groups A B C D Consult Factory Electromagnetic Compatibility EMC CE marked per EMC Directive 2004 108 EC Consult factory Reliability Prediction MTBF Mean Time Between Failure MTBF in hours using MIL HDBK 217F FN2 Per MIL HDBK 217 Ground Benign Controlled GgGc MTBF Hours MTBF Years Failure Rate FIT 923 711 105 4 1083 Configuration Controls Software Configuration Only via USB This transmitter drives an analog output current proportional to a frequency or duty cycle input measurement calculated by a microcontroller No switches or otentiometers are used to make adjustments to this transmitter Its behavior as an isolated signal amplifier transducer is determined via programmed variables set using a temporary USB connection to a host computer or laptop running a Windows compatible configuration software program specific to the transmitter model This software provides the framework for digital control of all configuration and calibration parameters and this information is stored in non volatile memory Refer to Operation Step By Step in the Technical Re
23. al and shield ground which is held in common to the input circuit ground of the transmitter Acromag Inc Tel 248 295 0880 11 http www acromag com Model TT239 0600 USB Connections 2 Wire Isolated Frequency Transmitter w USB This transmitter is configured and calibrated via configuration software that runs on Windows based PCs connected to the transmitter via USB Windows XP or later version required Refer to the following drawing to connect a PC to the transmitter for the purpose of configuration and calibration using this software TT SERIES USB TRANSMITTER CONNECTIONS USED FOR CONFIGURATION AND CALIBRATION OF THE TRANSMITTER IN A SAFE OR ORDINARY LOCATION PERSONAL COMPUTER RUNNING WINDOWS OS HOST PC RUNNING ACROMAG CONFIGURATION SOFTWARE HOST TO HOST USB PORT 3 lt HOST USB SERIAL PORT CONNECTOR AT BACK OF PC USB A MALE m ha O TB3 5 NOTE USER MUST MEASURE y TB3 6 OUTPUT POWER SIGNAL TO CALIBRATE OUTPUT N DEPO a COM OUTPUT LOAD DC POWER SUPPLY 2 32V MODEL TT2XX TRANSMITTER USB MiniB MALE USB MiniB Socket Front Panel of Module M TB2 TB1 O HU No INPUT INPUT CABLE Model 4001 113 USB A MALE Acromag i O a 2 WO a D2 aod l8 Refer to Configuration Software Kit Model TTC SIP which includes O Power connection 1 ea Model 4001 113 USB Cable 1 ea Model 4001 112 USB Cable 1 ea Model USB ISOLATOR M
24. amur compliant loop current e Wide range DC power input from 12 32VDC e Wide ambient temperature operation from 40 C to 80 C e Very low Output Ambient Temperature Drift better than 20ppm C e Thoroughly tested and hardened for harsh environments e CE Approved Pending UL cUL Class1 Division 2 Approved Pending The TT239 transmitter is designed for high density mounting on 35mm T type DIN rails Modules may be mounted side by side on 0 5 inch 12 5mm centers This model accepts frequency or pulse inputs and isolates the input signal allowing it to mate with grounded or non grounded sensors The output signal is transmitted via a two wire 4 20mA current loop The two wire current signal can be transmitted over long distances with high noise immunity Its inherent live zero 4mA offset current offers built in output fault detection should an output wire break Extra connection screws at the output allow it to be optionally wired for a sourced 4 20mA output configuration see Option Output Wiring Acromag Inc Tel 248 295 0880 4 http www acromag com Model TT239 0600 Mechanical Dimensions Modules may be mounted to 35mm T type DIN rail 35mm type EN50022 and side by side on 12 5mm 0 5 inch centers CAUTION IEC Safety Standards may require that this device be mounted within an approved metal enclosure or sub system particularly for applications with exposure to voltages greater
25. ansmitter Transmitter will drive 12V typical to the load with a 24V loop supply and 20mA loop current 6000 assuming negligible line drop Compute Rioag Max Vsupply 12V 0 020A for 20mA full scale output current Refer to the following table Vsupply Volts Max Roag W 20MA amp No Line Drop Ideally it should be possible to drive the over scale current of 24mA to the load and this would yield a maximum load resistance of 5000 for 24mA of loop current and a 24V loop supply Transmitter includes a USB socket for temporary connection to a PC or laptop for the purpose of setup and reconfiguration USB isolation is required when connected to a grounded input sensor see IMPORTANT note on the left During reconfiguration and calibration the transmitter receives power from both the USB port and the output loop Both power sources must be present to calibrate the transmitter CAUTION Do not attempt to connect USB in a hazardous environment Transmitter should be configured and calibrated in a safe environment only Data Rate USB v1 1 full speed only at 12Mbps Up to 32K commands per second USB 2 0 compatible Transient Protection Transient voltage suppression on USB power and data lines USB Connector 5 pin Mini USB B type socket Hirose Electric UX60 MB 5S8 om Jome OOOO 5V Power Transient protected but not used by module Differential Data Differential Data NC Not Connected Power Ground Connects
26. e Enter the Output Update The Output Update sets the rate at which the output will be updated with the scaled input measurement The transmitter will always update the output at this rate unless the Output Update Override is selected when the input falls below the Cutoff Frequency NOTE The Output Update determines the time available for the transmitter to capture the input signal Therefore the accuracy of the calculated measurement will decrease as the Output Update becomes faster Using a slower Output Update allows the transmitter to capture more of the input signal and calculate a more accurate measurement 18 http www acromag com Model TT239 0600 Configuration la TT239 Configuration Software File Help Communication Setup I O Config Test Calibration CONFIGURE I O Get I O Config Input Options Threshold Bipolar 0 0 25m Hys Measurement Frequency z Do not exceed 15 at input Pull Up Down Disabled with Pull Up Down enabled Sampling Options Cutoff Frequency 0 010 Hz Debounce 0 al ms Samples to Average 1 Output Options Output Update Override Update output immediately Cark ER 100 ms when OHz is measured p bounded by Cutoff Frequency i I O Scaling i 0 000 Hz 4m Out 10000 000 Hz 20m4 Out Status To preserve Configuration changes save to a file or send to a device Send I O Config TEST I O amp Start Polling Fr
27. e button to open the zero scale configuration popup Use a current meter or digital volt meter to accurately measure the transmitter output signal and enter the measurement in the input field provided Click the Submit Measurement button to send the calibration to the transmitter For output full scale endpoint adjustment click the Full Scale button to open the full scale configuration popup Use a current meter or digital volt meter to accurately measure the transmitter output current and enter the measurement in the input field provided Click the Submit Measurement button to send the calibration to the transmitter Factory Settings Use only in case of trouble or for sanitation purposes e Restore a transmitter to its original factory calibration e Restore a transmitter to its initial factory configuration You can click the Restore Factory buttons if you ever misconfigure or miscalibrate a transmitter in such a way that its operation appears erratic Calibration Status Bottom of Window The Calibration Status bar at the bottom of the window will display status messages relative to calibration over USB 14 http www acromag com Model TT239 0600 2 Wire Isolated Frequency Transmitter w USB TECHNICAL REFERENCE OPERATION STEP BY STEP Connections This section will walk you through the Connection Configuration Calibration process step by step Before attempting to reconfigure or recalibrate this transmitter ver
28. e Input Full Scale Adjust Adjustable over 0 5Hz to 100KHz Span Adjust Minimum recommended span 10 of full scale Cutoff Frequency Adjust Adjustable over 0 01Hz to 100KHz Debounce Adjust Adjustable over Oms to 1000ms in 1ms increments Acromag Inc Tel 248 295 0880 28 http www acromag com Model TT239 0600 Output 2 Wire Isolated Frequency Transmitter w USB Output Accuracy Accuracy is better than 0 05 of span typical 0 1 maximum for nominal input spans Relative accuracy varies with calibrated input and output span Accuracy includes the combined effects of repeatability terminal point conformity and linearization but does not include sensor error Output DAC Resolution Output DAC is 16 bit and its output current is approximated via the expression programmed_count 65536 24mA The min loop current is 3 6mA typical which is approximated via a DAC program count of 9830 Likewise 4mA corresponds to a count value of 10923 and 20mA to 54613 Thus for the 4 20mA output range we have an output resolution of 54613 10923 or 1 part in 43690 The effective I O resolution of this transmitter will be the lowest resolution of either the input or the output Output Update Adjustable from 10ms to 5000ms Determines the rate at which the output signal is updated Output Settling Time 1ms 0 to 98 for a step change in input typical Output Range 4 to 20mA DC nominal range with under range capability down
29. e to the transmitter Terminal voltage above 12V minimum must be maintained across the transmitter during operation Output Power Supply Effect Less than 0 001 of output span per volt DC of supply change Output Load Resistance Effect Less than 0 001 of output span for a 1000 change in load resistance Acromag Inc Tel 248 295 0880 29 http www acromag com Model TT239 0600 Output USB Interface IMPORTANT The input of this transmitter is isolated from its output and can be connected to grounded or un grounded input sensors However the transmitter s input circuit ground is connected in common to the USB power signal shield ground This will in turn make a connection to earth ground at the PC when directly connected to the USB port of a PC without using an isolator Failure to connect USB without isolation would connect the 1 25V input bias supply to input ground if the sensor is also earth grounded This will interfere with operation and cause the output to shift For this reason USB isolation is strongly recommended when connecting to a PC Otherwise in the absence of USB isolation and when connected to a grounded input sensor a battery powered laptop could be used to connect to the transmitter as the laptop does not normally connect to earth ground Acromag Inc Tel 248 295 0880 2 Wire Isolated Frequency Transmitter w USB Output Compliance and Load Resistance Equation 12V minimum tr
30. eferred to as sinking inputs and these will require that a separate power supply connect within the loop These types of receivers are depicted below MODEL TT2XX 0600 OUTPUT POWER WIRING SINKING OUTPUT CONNECTIONS WITH COMMON TWO WIRE TRANSMITTER CONNECTION TO SOURCING AND SINKING INPUT RECEIVERS POWER LOCAL TO THE RECEIVER Two Wire Output Connections to the Input Card of a Distributed Control System or Programmable Logic Controller TOP VIEW INPUT SIDE OUTPUT SIDE OUTPUT SIDE SS 24VDC POWER SUPPLY DCS PLC SOURCING INPUT CARD TB1 lt INPUT lt ANY MODEL TT2XX 0600 INPUT TB3 OUTPUT DCS PLC SINKING INPUT CARD TB4 COMMON SOURCING INPUT RECEIVER SINKING INPUT RECEIVER The 24V DC Excitation is The 24V DC Excitation is Provided Provided by the Card by a Separate Power Supply WARNING For compliance to applicable safety and performance standards the use of twisted pair output wiring is recommended Failure to adhere to sound wiring and grounding practices as instructed may compromise safety performance and possibly damage the transmitter TIP Ripple amp Noise Power supply ripple at 60Hz 120Hz is normally reduced at the load by the transmitter but additional filtering at the load can reduce this ripple further For large 60Hz supply ripple connect an external 1uF or larger capacitor directly across the load to reduce excessive ripple For sensitive application
31. equency Hz Click Start Polling to poll the input and display its value The LED next to the button will flash when polling is active Click Stop Polling to discontinue polling the input HELP Press F1 for Help on a selected or highlighted field or control Alternatively click the button in the upper right hand corner of the window and click a field or control to receive a Help message pertaining to the item pointed to NOTE Under range 3 6mA and over range 24mA capability is built into the output range by design See Output Specifications for more detail Other Configuration Controls Acromag Inc Tel 248 295 0880 2 Wire Isolated Frequency Transmitter w USB Select the Output Update Override Optional Select the Output Update Override checkbox if the desired behavior upon reaching the Cutoff Frequency is to update the output immediately to OHz Left unchecked the time before the output signal reaches OHz will be a function of the number of Samples to Average and the Output Update rate Enter the I O Scaling values You may rescale the input range to use only a portion of the input range to drive the output if desired Be careful not to reduce the input range too much as resolution will be proportionally diminished and noise error magnified In the corresponding O Scaling field enter the input signal minimum zero value to correspond to the output range Zero Scale value 4mA
32. ference section of this manual for detailed information on available software control of this model Acromag Inc Tel 248 295 0880 32 http www acromag com Model TT239 0600 2 Wire Isolated Frequency Transmitter w USB REVISION HISTORY The following table details the revision history for this document Release Date EGR DOC Description of Revision 30 OCT 13 JMO KLK Initial Acromag release 05 NOV 13 os JMO KLK Re characterized Input Minimum Pulse Width 12 NOV 13 JMO KLK Added MTBF Reliability Prediction Acromag Inc Tel 248 295 0880 33 http www acromag com
33. figuration Software lt File Help Communication Setup I O Config Test Calibration CONFIGURE I O Get I O Config Input Options Threshold Bipolar 0 0 25m Hys Measurement Frequency z me Do not exceed 15V at input Pull Up Down Disabled with Pull Up Down enabled Sampling Options Cutoff Frequency 0 010 Hz Debounce 0 al ms Samples to Average 1 Output Options Output Update Override Update output immediately when OHz is measured bounded by Cutoff Frequency Output Update i00 ms Sample Window I O Scaling 0 000 Hz 4m Out 10000 000 Hz 20m4 Out Status To preserve Configuration changes save to a file or send to a device Send I O Config TEST 1 0 start Poling Frequency Hz Click Start Polling to poll the input and display its value The LED next to the button will flash when polling is active Click Stop Polling to discontinue polling the input HELP Press F1 for Help on a selected or highlighted field or control Alternatively click the button in the upper right hand corner of the window and click a field or control to receive a Help message pertaining to the item pointed to Acromag Inc Tel 248 295 0880 2 Wire Isolated Frequency Transmitter w USB Enter the Cutoff Frequency The Cutoff Frequency controls the minimum frequency the transmitter will measure When the frequency of the input signal falls
34. ify the following electrical connections Connect Input N Connect Output Connect Power Connect PC USB Configure I O Calibration Connections NOTE When calibrating the output meter and load resistor for current output must be accurate beyond the transmitter specifications or better than 0 1 As a general rule calibration equipment accuracy should be four times better than the rated accuracy you are trying to achieve with this transmitter Connect Output Connect an output load to the transmitter appropriate for either current or voltage as required by your application You will need to measure the output current or voltage accurately in order to calibrate the output of the transmitter You could connect a current meter in series with the load to read the output current directly or a digital volt meter in parallel with the load to measure output voltage Alternatively you could simply connect a voltmeter across a precision load resistor and then accurately read the output current as a function of the IR voltage drop produced in the resistor recommended for current outputs Calibration amp Configuration Connections Connect Output Power Refer to Output Power Connection section and wire an output current loop to the transmitter as illustrated You will need to measure the output current accurately in order to calibrate the transmitter You can connect a current meter in series in this loop to read the loop curren
35. ing Custom calibration to customer specifications can be added as a separate item at time of purchase Input 2 Wire Isolated Frequency Transmitter w USB TT 239 Ss ee u Series aaas i i TT Thin Transmitter Model 239 Frequency Pulse Reserved Power 6 2 Wire Loop Powered Approvals 0 UL cUL Class 1 Division 2 Approvals Pending Additional Approvals 0 No other approvals Optional factory calibration to customer specifications is ordered as a separate line item at time of purchase and on a per unit basis Factory calibration will require the specification of input threshold measurement type pull up pull down cutoff frequency debounce samples to average output update and I O scaling Normal or reverse acting output and a filter level can also be specified Use form 8500 858 for specifying this calibration from our web site at www acromag com The standard model without adding custom factory calibration is calibrated by default to reference test conditions Recalibration of any transmitter will require use of a TTC SIP configuration kit ordered separately see Accessories section Modules can be mounted on standard 35mm T Type DIN rail Input Reference Test Conditions 5 0V Square Wave Input Threshold Bipolar 0 0V Hysteresis 28mV Measurement Frequency Pull Up Down Disabled Cutoff Frequency 0 5Hz Samples to Average 1 Debounce Oms Output Ra
36. ions or save them to a file by opening the File menu in the upper left hand corner of the window and selecting Save As Select the Threshold The Threshold should be selected based on the type of input signal the transmitter is measuring Select Bipolar when the input signal is zero crossing Select Unipolar when the input signal is non zero crossing There are two levels of hysteresis available for both Bipolar and Unipolar options The hysteresis is listed in parenthesis Select the Measurement Select Frequency to measure the frequency of the input signal Select Duty Cycle to measure the duty cycle of the input signal NOTE The maximum input frequency when Measurement is set to Duty Cycle is 3KHz Select the Pull Up Down Select Pull Up to pull the FINP terminal to 3VDC through 12 4KQ Select Pull Down to pull the FINP terminal to the FRTN terminal through 1KQ Select Disabled to disconnect the internal resistors Refer to the example input connections in the Sensor Input Connections section for common sensor configurations WARNING Do not exceed 15VDC with the internal pull up or pull down resistors enabled or damage to the circuit will result Limit internal pull up pull down resistor power to less than 0 25W Disable the Pull up Pull down if the input to the transmitter is AC mains voltage 120Vpms 17 http www acromag com Model TT239 0600 Configuration E 7 TT239 Con
37. lated Frequency Transmitter w USB Connect a DC power supply and load in series in the two wire loop as shown in the drawing below This transmitter has an ANSI ISA Type II output in which the transmitter s power and output signal share the same two leads and the transmitter output has a floating connection with respect to earth ground applied at the loop supply minus terminal Output connections are not polarized The output and designation are for reference only with current normally input to Output and returned via Output current sinking Loop supply voltage should be form 12 32VDC with the minimum voltage level adjusted to supply over range current to the load plus 12V MIN across the transmitter plus any transmission line drop Variations in power supply voltage between the minimum required and a maximum of 32VDC across transmitter has negligible effect on transmitter accuracy Variation in load resistance has negligible effect on output accuracy as long as the loop supply voltage is set accordingly Note the traditional placement of earth ground in the current loop The transmitter output minus varies off this ground by the voltage drop in the load resistance and lead wire MODEL TT2XX 0600 OUTPUT POWER WIRING TRADITIONAL LOOP POWERED SINKING OUTPUT CONNECTIONS INPUT SIDE TOP VIEW OUTPUT SIDE OUTPUT SIDE i THIS TRANSMITTER IS CURRENT LO
38. ncy Output Update 499 ms Sample Window I O Scaling 0 000 Hz 4m Out 10000 000 Hz 20mA4 Out Status To preserve Configuration changes save to a file or send to a device Send I O Config TEST I O start Poling Frequency Hz Click Start Polling to poll the input and display its value The LED next to the button will flash when polling is active Click Stop Polling to discontinue polling the input Acromag Inc Tel 248 295 0880 2 Wire Isolated Frequency Transmitter w USB At this point you can click the I O Config Test tab to begin configuring the transmitter or to optionally test its operation The I O Config Test window is the image shown at left When you click the I O Config Test tab the software retrieves the transmitter s current configuration and displays it similar to the image shown at left If you are connected to a transmitter the initial I O Config page represents the current configuration of the connected transmitter before making changes Otherwise if you have loaded the configuration from a saved a file or if you have made changes to any fields you can click the Get I O Config button to retrieve the transmitter s current configuration NOTE If you make any changes to the selections indicated the only way to preserve your changes is to write them to the transmitter by clicking the Send I O Config button after completing your select
39. nge 4 20mA into 250Q load I O Scaling OHz to 10KHz Normal Acting Output Update 100ms Output Update Override Disabled Ambient Temperature 25 C Power Supply 24VDC Input Frequency Frequency Measurement OHz to 100KHz Duty Cycle Measurement OHz to 3KHz Input Acquisition Time See Output Update Input Impedance 35 5KQ typical Input Pull up Pull down Internal Software selectable 12 4KQ pull up to 4V 3V when input hysteresis configured as 28mV 84mV respectively 1KQ pull down to FRTN or disabled to disconnect the internal resistors CAUTION Do not exceed 15VDC at input terminal TB1 with the internal pull up or pull down resistors enabled or damage to the circuit will occur Disable Pull up Pull Down if transmitter input is AC mains voltage 120V anys Acromag Inc Tel 248 295 0880 26 http www acromag com Model TT239 0600 Input 2 Wire Isolated Frequency Transmitter w USB Unipolar Signal Configuration Input Amplitude Recommend 3VDC minimum 170VDC 120Vkms maximum Input Threshold See table below Input Hysteresis Configurable for 28mV or 84mV typical Input Threshold for Unipolar Signal Configuration Per Input Range Input Threshold Typical Input Range Z ue 28mV hysteresis 84mV hysteresis OHz to 20KHz 1 6VDC 5 2VDC 2OKHz to 100KHz 2 1VDC 5 5VDC Bipolar Zero Crossing Signal Configuration Input Amplitude See table below Input Threshold OmV typical I
40. nput Hysteresis Configurable for 28mV or 84mV typical Input Amplitude for Bipolar Signal Configuration Per Input Range Minimum Amplitude Typical Maximum Input Range i 28mV hysteresis 84mvV hysteresis Amplitude OHz to 20KHz 125mV 170VDC 20KHz to 100KHz 150mV 200mV 120Vems Input Resolution and Accuracy Frequency measurement utilizes one of two measurement techniques depending on the input frequency The technique used for measuring OHz up to 6500Hz results in decreased internal resolution with increasing frequency A 500Hz hysteresis from 6000Hz to 6500Hz is used when switching sampling algorithms The technique used for measuring frequencies at or above 6000Hz has a constant internal resolution which is determined by the software configured Output Update time Resolution for frequencies up to 6500Hz can be calculated as follows 1 part in 6MHz Input Frequency Hertz Resolution for frequencies at or above 6000Hz can be calculated as follows 1 part in 6MHz Output Update milliseconds Input Range Resolution and Measurement Accuracy Per Input Range Output Typical l R I Resol nput Range Update nput Resolution Accuracy QHz to 100Hz 0 05Hz OHz to 1000Hz 0 5Hz OHz to 5000Hz 1Hz OHz to 10KHz 20Hz cD z cD 2 N S Pan O cD og cD 2 LL 1 part in 60000 400Hz OHz to 100KHz 1 part in 600000 40Hz 1000ms 1 part in 6000000 4Hz Acromag Inc Tel 248 295 0
41. olated via a pulse transformer and is received by the 16 bit output DAC which drives a 4 20mA process current Power for the isolated input side of the circuit is provided via an isolated flyback converter that operates in parallel with the output loop Setup involves setting the input threshold measurement type cutoff frequency samples to average debounce time output update time and scaling the input range endpoints to 4mA and 20mA at the output Output scaling can also be done in reverse to produce a reverse acting output signal The maximum over range output signal is approximately 24mA the under range signal is 3 6mA Refer to the block diagram above to gain a better understanding of how this transmitter works The input USB output power circuits are isolated from each other The USB port ground is common to the input circuit ground The USB port ground of most PC s is also common to the USB cable shield and earth ground Input sensors could be grounded or ungrounded For this reason it is recommended that USB signals be isolated when connected to a PC to prevent a ground loop from occurring between the PC earth ground and a grounded input sensor which would have the negative effect of pulling the input bias supply to ground clipping the negative portion of the bipolar input range Acromag Inc Tel 248 295 0880 21 http www acromag com Model TT239 0600 2 Wire Isolated Frequency Transmitter w USB Flow Chart
42. onsent of Acromag Inc Acromag Inc Tel 248 295 0880 3 http www acromag com Model TT239 0600 GETTING STARTED DESCRIPTION Key Features Application 2 Wire Isolated Frequency Transmitter w USB The TT239 is an ANSI ISA Type 2 transmitter designed to interface with frequency time domain sensors and transducers measure the input signal frequency or duty cycle and modulate a 4 20mA current signal to drive a two wire current loop The transmitter will condition periodic or pulse waveform signals and provide an isolated process current output Configuration is performed using software and a USB connection to Windows based PC s Windows XP and later versions only e Fully configurable using Windows software via USB e Thin 12 5mm wide enclosure for high density DIN rail mounting e Wideband frequency inputs from 0 01Hz to 100KHz e Rapid response time and high accuracy e Measures Frequency and PWM Duty Cycle e Adjustable output update time cutoff frequency debounce and sample averaging e Accepts input voltage amplitudes up to 170VDC 120VAC e Interfaces with both zero crossing and non zero crossing signals e Software configurable pull up and pull down resistors 4VDC 3VDC input pull up for interfacing with sensors and transducers e Input and output circuits are fully isolated from each other e Convenient two wire loop power with non polarized output connections e Normal or reverse acting output e N
43. reduced input resolution with increasing input frequency Input resolution can be calculated as follows 1 part in 6MHz Input Frequency Hertz Note When using Technique A it is possible that the input signal period is greater than the Output Update rate In the event that the Output Update is reached before a new input capture has occurred since previous Output Update the output of the transmitter will reflect the last input measurement unchanged from previous Output Update Conversely multiple input captures can occur when the input signal period is less than the Output Update rate Each new input capture contributes to the Cumulative Moving Average CMA The measurement calculated based on the CMA is added to the FIFO queue on every Output Update Technique B For measuring input frequencies greater than 6000HZz This measurement technique counts the number of input captures within a user configured time span Output Update Due to this method s dependence on Output Update the input resolution increases with increasing Output Update Input resolution can be calculated as follows 1 part in 6MHz Output Update milliseconds Note A 500Hz hysteresis is used when switching the measurement techniques The measurement technique switch occurs at 6000Hz or 6500Hz depending on the measurement technique currently in use TROUBLESHOOTING Diagnostics Table Without a USB isolator a ground loop is possible A missing USB Isola
44. rop down menu the software will automatically attempt to open a connection with the selected transmitter If the software does not have an open connection with the transmitter click the Open button to open a connection with the transmitter After opening a connection to a transmitter the transmitter s Model Serial Number Manufacturer and connection status will be displayed as shown in the image on the left In addition the Status field will indicate Device opened successfully as shown in the image at left 16 http www acromag com Model TT239 0600 Configuration z TT239 Configuration Software a _ File Help Communication Setup o Config Test Calibration DEVICE SELECT Device Ffzge tet0 o000001 i 7 Model TT239 0600 Serial Number 0000001 Manufacturer Acromag Inc Status Device opened successfully Reset Device TT239 Configuration Software _ File Help Communication Setup 1 O Config Test Calibration CONFIGURE IjO Get I O Config Input Options Threshold Bipolar 0 0 25m Hys Measurement Frequency z i maps Do not exceed 154 at input Pull Up Down Disabled with Pull Up Down enabled Sampling Options Cutoff Frequency 0 010 Hz Debounce 0 ms Samples to Average 1 Output Options Output Update Override Update output immediately when OHz is measured bounded by Cutoff Freque
45. rovided Click the Submit Measurement button to send the calibration to the transmitter NOTE To measure output current you can alternatively connect a voltmeter across a precision load resistor and then accurately read the output current as a function of the IR voltage drop produced in the resistor 20 http www acromag com Model TT239 0600 BLOCK DIAGRAM TT239 0600 SIMPLIFIED SCHEMATIC FILTERING AND DETAIL OMITTED FOR CLARITY FREQUENCY OR PULSE INPUT FINP 4 2 Wire Isolated Frequency Transmitter w USB ISOLATED OUTPUT gt B3 TWO WIRE OUTPUT 2 FRTN com O O com OIB LOOP ao 12 36VDC 4 20 EARTH mA GROUND RLoab 16 BIT DAC How It Works Key Points of Operation e Loop Powered e Input is Isolated from Output e Input circuit is common to USB ground e USB powers a portion of the input circuit when connected but not the output POLARITY TRI STATE PROTECTION c BUFFERS THERE ARE NO INTERNAL TB4 Co ee CONNECTIONS TO C TERMINALS WIRING CONNECTIONS a4 ISOLATED FLYBACK CONVERTER 3 3V gt I OSC o y ISOLATED OUTPUT The TT239 transmitter uses a 32 bit microcontroller to measure the input signal and communicate to the output DAC via a serial digital pulse stream The digital communication stream is is
46. s sesessesessecessecesoscecesoecesoecesoecesoesesoecessecesoscessecessecesesoeseesesssoeoe 11 USB COnnNectHONS nrs ni 12 CONFIGURATION SOFTWARE cececcccsecescscscesccssccescceseescsacesecesscesnseseeesecsnesses 13 Quick OV CIO sisri ciinii annen onere sot rae S EENEN NTARE 13 OPERATION STEP BY STEP eeessssssssssssssssssssssssssssssssssssssssssssssssssssseee 15 CONNECTORS ea E EEEE AAA EE EE EEE 15 COM OUP ACTOR isra E EE EE EE E A 17 Calibration Optional sesesesessosossessososssosososososososososososososososososososososososssosososososososssosossso 20 BLOCK DIAGRAM ssssssssssssssssssssssssssosssssssssssssssssssssssssosssssssssssssssssssssoo 21 HOWIE WOK onir T R 21 FIOW CHa aea E E E E E E A 22 Measurement TechniquesS ssesessesessecessecessscecescecossesesoecescecesoecessecesoscessecessecesesoessscesseceoe 23 TROUBLESHOOTING rirriririrn rnr EE 23 Diagnostics Table urease veces aac te snnaa irinn ar EEE AAN a 23 Service amp Repair Assistance sessecseescescecceecoeccoescesceecoescecceccoeccescesceecoeccescecceecoescecceeseecseee 24 Acromag Inc Tel 248 295 0880 http www acromag com Model TT239 0600 2 Wire Isolated Frequency Transmitter w USB Software Interface Package narosna een ae hee 25 USB WSQIAGOR iiini 25 USB A B Ca Die iiscicseccteciict in tins beccetsies accasin E 25 USB A MInnB Capless connan sense escewonssteeveuedaueseces seaciueesacbeeaactacs 25 Model NUNNMDOR oein a a a 2
47. s with high speed acquisition at the load high frequency noise may be reduced significantly by placing a 0 1uF capacitor directly across the load as close to the load as possible TIP Inductive Loads If the two wire current loop includes a highly inductive load such as an I P current to pressure transducer this may reduce output stability In this case place a 0 1uF capacitor directly across the inductive load and this will typically cure the problem Acromag Inc Tel 248 295 0880 10 http www acromag com Model TT239 0600 2 Wire Isolated Frequency Transmitter w USB Output Power This model includes two extra terminal connections at TB4 marked C which Connections provide a convenient wiring point for a sourcing wiring variation as shown below TBI INPUT TB2 INPUT Internally these two terminals are connected in common with each other and do not connect to the internal circuit Use of these terminals in the wiring scheme allows external power to be connected local to the transmitter and form a sourcing output entity from this sinking output as shown LOCAL 24VDC MODEL TT2XX 0600 OPTIONAL POWER SUPPLY OUTPUT POWER WIRING OPTIONAL SOURCING OUTPUT CONNECTIONS WITH POWER LOCAL TO TRANSMITTER TOP VIEW INPUT SIDE OUTPUT SIDE OUTPUT SIDE REMOTE TB3 RECEIVER LOAD OUTPUT ANY MODEL TT2XX 0600 a COMMON o lt OPTIONAL COMMON CONNECTIONS WITH LOCAL EXTERNA
48. se of an isolator can be avoided if a battery powered laptop PC is used to connect to the transmitter and the laptop has no other earth ground connection either directly or via a connected peripheral Acromag Inc Tel 248 295 0880 12 http www acromag com Model TT239 0600 2 Wire Isolated Frequency Transmitter w USB CONFIGURATION SOFTWARE Quick Overview This transmitter can only be configured and calibrated via its configuration Click Open to connect to the TT239 0600 software and a USB connection to a PC or laptop The configuration and the software will look similar to the software is contained in a zip file that can be downloaded free of charge following from our web site at www acromag com For this transmitter download the file named 9500459 zip If you do not yet have a user account you 0 nes coor ce s Will need to create one before the download becomes accessible The Zip O P file will extract to an executable file which installs software to the Program Files Acromag directory on your computer Note You need w oo i administrator privileges on the PC you wish to install this software Once installed navigate to the Program Files Acromag directory and open i Model 77299 0600 the correct software for your particular model This software is also Serial Number 0000001 included on a CDROM bundled with the Configuration Kit TTC SIP see EE e Accessories For this transmitter u
49. se the software named TT239 Status Device opened successfully Confi g ex e The initial configuration software window for this model is shown at left Configuration information is divided across three pages as follows Communication Setup I O Config Test and Calibration Communication Setup First Connect to Module Here e Scan for connected transmitters and Open Close communications with them e Display the Model Serial Number and Manufacturer of the connected transmitter and report the status of communication ee I O Config Test Configure and or Test the Module Here Genmunleiensetin VO Confio Test Galtratan e Select the Threshold Select Bipolar for zero crossing signals or Unipolar for non zero crossing signals ena Gaia aaeSaMeI SS e Select the Measurement Options are Frequency or Duty Cycle i _ ere e Select the Pull Up Down depending on the input sensor type L in e Enter the Cutoff Frequency Inputs below the Cutoff Frequency are Cutoff Frequency 0 010 He measured as OHz ee e Enter the Debounce time The input must be steady for this length of p e C F pdato oput mediate time before the transmitter will conduct a measurement ee E Preguen e Enter the number of Samples to Average This controls the number of eae mmoe EEE ea aOd samples included in the FIFO queue first in first out T e Enter the Output Update This controls the rate at which
50. t directly not recommended Alternatively you could simply connect a voltmeter across a series connected precision load resistor in the loop and accurately read the output current as a function of the IR voltage drop produced in this resistor recommended In any case be sure to power the loop with a voltage that is minimally greater than the 12V required by the transmitter plus the IR drop of the wiring and terminals plus the IR drop in the load To computer the IR drop be sure to use a current level that considers the over scale current up to 24mA Loop Power Supply Voltage Make sure your voltage level is at least 12V plus 0 020 load_resistance Ideally it should be great enough to drive the 24mA over range current into your load i e up to 12V 0 024 Rload assuming line drop is negligible and the maximum possible over range is considered Always apply power to the transmitter output loop even when connected to USB Connect to PC via USB Refer to USB Connections section and connect the transmitter to the PC using the USB isolator and cables provided in the Configuration Kit TT SIP Now that you have made your connections and applied power to your loop you can execute the TT239 Config exe software to begin configuration of the transmitter software is compatible with XP or later versions of the Windows operating system Acromag Inc Tel 248 295 0880 15 http www acromag com Model TT239 0600 Connections
51. t on signal wiring adequate wire insulation should be used and proper wiring practices followed As a rule output wires are normally separated from input wiring and from power wiring for safety as well as for low noise pickup TIP Input and output terminal blocks are a plug in type and can be easily removed to facilitate module removal or replacement without removing individual wires 2 Wire Isolated Frequency Transmitter w USB Sensor wires are connected directly to the module input terminals at the bottom of the module the spring loaded DIN clip side Transmitter input signals are isolated from output and power Observe proper polarity when making input connections Refer to the example input connections on the following page e Transmitter input signal is isolated from output e Inputs are polarized Observe proper polarity OUTPUT TERMINALS OUTPUT SIDE lt FRONT DIN RAIL SPRING CLIP INPUT SIDE INPUT TERMINALS sl o_o DIN RAIL a N En INPUT SIDE SPRING CLIP x Z BOTTOM VIEW COM 3 FNP 4 COM FRTN Acromag Inc Tel 248 295 0880 7 http www acromag com Model TT239 0600 ENABLE INPUT MopE SINUSOIDAL SQUARE PULSE UNIPOLAR SHIELDED BIPOLAR CABLE ENABLE LHS a Waveform A Generator ame onary SEE NOTE crounn L I LOGIC LEVEL Taal Jei EITHER MODE MAY BE SELECTED ENABLE INPUTMODE MAGNETIC PICKUP UNIPOLAR SHIELDED BIPOLAR
52. the essential elements for configuring TT230 amp TT330 family Transmitters Isolation is recommended for USB port connections to these transmitters and will block a potential ground loop between your PC and a grounded current loop A software CDROM is included that contains the Windows software used to program the transmitter USB Isolator Order USB ISOLATOR e USB Signal Isolator e USB A B Cable 4001 112 e Instructions 8500 900 This kit contains a USB isolator and a 1 meter USB A B cable for connection to a PC This isolator and cable are also included in TTC SIP see above USB A B Cable Order 4001 112 e USB A B Cable 4001 112 This is a 1 meter USB A B replacement cable for connection between a PC and the USB isolator It is normally included with the TTC SIP Software Interface Package and also with the isolator model USB ISOLATOR USB A mini B Cable Order 4001 113 e USB A mini B Cable 4001 113 This is a 1 meter USB A miniB replacement cable for connection between the USB isolator and the transmitter It is normally included in the TTC SIP Note that software for all TT Series models is available free of charge online at www acromag com Acromag Inc Tel 248 295 0880 25 http www acromag com Model TT239 0600 SPECIFICATIONS Model Number Model TT239 0600 e Signal Transmitter e Isolated RTD Input e Two Wire Powered e CE Approved Pending e Includes UL cUL Class 1 Division 2 approvals Pend
53. tor between a grounded input signal source and earth could cause a ground ground of the PC USB port It is best to connect to loop between a USB via a USB isolator for this reason and for grounded input sensor increased safety and noise immunity Use an isolator and earth ground at the like the Acromag USB ISOLATOR Otherwise use a connected PC s USB port battery powered laptop to configure the transmitter which does not normally earth ground its USB port Acromag Inc Tel 248 295 0880 23 http www acromag com Model TT239 0600 2 Wire Isolated Frequency Transmitter w USB Diagnostics Table POSSIBLE CAUSE POSSIBLE FIX Software Fails to Detect Transmitter Before attempting repair or Bad USB Connection Recheck USB Cable Connection replacement be sure that all Use the reset button on the Acromag USB isolator to USB has not enumerated installation and configuration trigger re enumeration of the transmitter or simply the transmitter procedures have been followed unplug re plug the USB cable to the transmitter and that the transmitter is wired Communication or power i l Close the current connection with the software properly Verify that power is was interrupted while D re E ee applied to the transmitter and that USB was connected with j communication or simply exit the configuration your supply voltage is at least 12V the configuration software and restart it software running O ENE PrODIE
54. transmitter to its original factory state See Specifications Reference Test Conditions This includes calibration and configuration This control can be used as a sanitation tool to restore the transmitter to its initial configuration 19 http www acromag com Model TT239 0600 Calibration Optional r TT339 Configuration Software File Communication Setup 1 0 Config Test Calibration L CALIBRATION FACTORY SETTINGS Restore Factory Calibration Restore to Factory Default CALIBRATION STATUS TT339 Configuration Software File Communication Setup 1 0 Config Test Calibration CALIBRATION Output Calibration Instructions Output Calibration For Zero Scale endpoint adjustment use a current meter or digital volt meter to accurately measure the transmitter output the Submit Measurement button to calibrate the transmitter Tip To measure current you can alternatively connect a voltmeter across a precision load resistor and then accurately read the output current as a function of the IR voltage drop produced in the resistor recommended for current outputs Currently calibrating 20mA Zero Scale Zero Scale Measurement mA signal and enter the measurement into the input field below Click Acromag Inc Tel 248 295 0880 2 Wire Isolated Frequency Transmitter w USB Once you ve configured the transmitter you are
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