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    Digital Load Cell Amplifier, Output 4-20mA/0-10V/RS485

    5 out of 5 based on 22 reviews | Write a review
    $109.85
    High precision load cell amplifier has a 6 digit LED display, output signal 4-20mA/ 0-5V/ 0-10V/ RS485. There are 3 keys for parameter settings. Digital load cell amplifier can be calibrated on-line by its 3 keys. The setting parameters include zero, capacity, communication rate, division value, decimal digits, etc.
    SKU: ATO-LCTR-OAR
    *
    Free Shipping Worldwide
    Delivery date: 6-12 days

    Load cell amplifier has on-line calibration functions, output standard signal 4-20mA/0-5V/0-10V/RS485.

    Specification:

    Model ATO-S-LCTR-DY610
    Accuracy ±0.2%FS ±1 byte
    Input signal 0~±20mV
    Excitation voltage for load cell DC 5V
    Output signal * DC 4-20mA, DC 0-5V, DC 0-10V, RS485 (Modbus-RTU), 4-20mA & RS485, 0-5V & RS485, 0-10V & RS485
    Sampling rate 20 times/s, 80 times/s
    Power supply DC 12-30V
    Power consumption <1W
    Display 6 digit red LED, -99999~999999

    Digital load cell Amplifier dimension drawing (unit: mm):
    Digital load cell amplifier dimension
    Load cell Amplifier wiring diagram:
    Digital load cell amplifier wiring diagram

    Digital load cell amplifier calibration
    This vedio shows wiring and calibration steps of digital load cell amplifier ATO-LCTR-OAR. New model has 3 new signal outputs: 4-20mA & RS485, 0-5V & RS485 and 0-10V & RS485. Therefore, the panel and the parameter setting are different.



    How to use the RS485 communicating function of load cell amplifier?
    The following video is about how to use the RS485 communication function of ATO load cell amplifier ATO-LCTR-OAR.

    Existing reviews of Digital Load Cell Amplifier, Output 4-20mA/0-10V/RS485
    Load cell amplifier with digital display
    The load cell amplifier with digital display is a very good product. It can be used as a load cell indicator for reading the weight values. So I save the money on buying another digital indicator. After setting parameters, I use a standard weight of 200g to test it, and the measured data is very accurate.
    From: Christian C | Date: 22/07/2019
    Was this review helpful? Yes No (1/0)
    Peak function of digital load cell amplifier
    Hello, I was watching the video for the 6 digit display controller for load cells and did not see what the peak function is. Is this used to measure the peak force applied to the load cell?
    From: Crisin | Date: 27/04/2021
    Was this review helpful? Yes No (1/0)
    ATO Responded
    The peak function is related to the load cell not the display controller. Yes, it is used to measure the peak force applied to the load cell.
    Display controller of digital load cell
    What is the output of the 6 digit display controller for digital load cells, is it newtons?
    From: Regina | Date: 06/05/2021
    Was this review helpful? Yes No (0/0)
    ATO Responded
    It can provide kg, g, ton, and newtons readouts, just set up as you like.
    We have some other questions.
    Thank you for all the answers. We do have some additional questions.
    Assuming the use of ATO-LCTR-DY510, 0-10V and based on the load cell mentioned in the previous mail (FMZK 10kg):
    http://www.forsentek.com/down/miniature load cell FMZK.pdf
    The load cells have quite a big zero balance (±0.1mV/V). Does the amplifier have enough adjusting range to create an output voltage of 0V at zero load?
    The load cells have a rather low output signal (about 1.0mV/V). Giving the fact that when a load cell is loaded with 7kg, is it possible to reach a maximum output voltage of 10V? Even when zero balancing is taken into account?
    About the 200mA current, maybe I should rephrase it. 200mA is the maximum current that we can supply to the amplifier. Is the supply current of the amplifier (with a load cell) below 200mA?
    Best regards.
    From: Hsdallas | Date: 24/12/2021
    Was this review helpful? Yes No (1/0)
    ATO Responded
    1. Yes, the ATO-LCTR-DY510 load cell amplifier has enough adjustable range to generate 0V output voltage at zero Load, no problem.
    2. Yes, after the amplifier and the load sensor are calibrated, it can output 0-10V signal corresponding to the measuring range of the weighing sensor, such as 0-7kg corresponding to the output 0-10V signal, no problem.
    3. The current consumed by the amplifier is about 20mA and the maximum current is no more than 2A, so it is OK to supply 200mA to the amplifier.
    I bought a Digital load amplifier 4-20mA.
    I bought a Digital load amplifier 4-20mA. I'm unable to get any output signal from the digital load cell amplifier. The signal is stuck between 32-33mA.
    From: Bruce | Date: 24/05/2022
    Was this review helpful? Yes No (0/0)
    ATO Responded
    Please send us a video to confirm the problem you describe. The video should show the wiring of the load cell and the transmitter, and you use a multimeter to measure the signal 32-33mA at the output terminal of the transmitter.
    Also, you can refer to our video to check that your wiring and calibration are correct. See on: https://youtu.be/nD446xVhmAA
    Cannot I exceed the 2Nm of torque correct?
    In the documentation, you state that the “total load range 1 / 10 to remain stable”. If I have 20Nm Torque transducer, Cannot I exceed the 2Nm of torque correct?
    From: Shelby | Date: 26/05/2022
    Was this review helpful? Yes No (0/0)
    ATO Responded
    Usually we have calibrated it when it leaves the factory, you can use it directly to check whether the output data is accurate.
    The manual mentioned that the calibration weight is 1/10 of the total range of the load cell, which means that if your load cell range is 100Kg, then the calibration weight you use is at least 10Kg. Of course, if your calibration weight is bigger, and the closer to the sensor's range of 100Kg, the calibration will be more accurate. In the same way, if your torque sensor is 20Nm, you can apply a calibrated torque of at least 2Nm, that is, not less than 2Nm for calibration. It would be better if you could apply a calibrated torque of 5Nm, or 10Nm.
    Questions about load cell amplifier
    I have a couple of ATO-LCTR-OAR units. How can I tell which ones have Voltage output or Current output and/or RS485 output?
    From: Fred | Date: 02/03/2023
    Was this review helpful? Yes No (0/0)
    ATO Responded
    The nameplate label of the transmitter shows: A1 is current, A2 is voltage, and S2 is RS485 communication.
    Can we use this Digital Loadcell Amplifier for our load cell?
    We need a load cell signal conditioner for our dynamometer. We want to confirm with you if we can use this Digital Loadcell Amplifier for our load cell.
    From: Zainul | Date: 27/03/2023
    Was this review helpful? Yes No (0/0)
    ATO Responded
    You can use our Loadcell amplifier for your load cell, no problem.
    I want to get a CAD model of load cell amplifier
    We just purchased the following items and I'm hoping I can get a CAD model of each.
    ATO-LC-TC04 - 20 Ton Version
    SKU: ATO-LCTR-OAR
    From: rabbie | Date: 13/06/2023
    Was this review helpful? Yes No (0/0)
    ATO Responded
    Unfortunately, we do not provide 3D models.
    Please refer to the dimensions on the website.
    Thank you for your understanding.
    Modbus Mapping
    We are using the ATO-LCTR-OAR  with Modbus output. We read the Torque output of a torque sensor, and can read it fine from the given registers. We'd like to change the baud rate from 9600 to 38400, can it be done via the button interface?
    From: Tom | Date: 10/07/2023
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    ATO Responded
    It cannot be changed to 38400, and the key can only be changed to 4800, 9600, and 19200 by changing the code "bd".
    Please see the user manual for details.
    Why is load cell amplifier FFs result is the same?
    I use the Modbus RS485 interface at 9600,8,1 to read data.
    The amplifier working fine but now only reads FFs.
    So I verified with Commix1.4 terminal with different baud rates, re-entered all parameters of the amplifier, and all data FFs is the same result. Please tell me why.
    From: reut | Date: 17/07/2023
    Was this review helpful? Yes No (0/0)
    ATO Responded
    "FF" will appear when there is a negative number, and "FF" will appear when you return.
    That is to say, you need to use the low byte to subtract the high byte.
    For example: when "FF" appears, the returned value is 0BFB4AFA, that is to say, 4AFA minus 0BFFB.
    Is it possible the amplifier has lost its settings and needs to be reset?
    Thanks for responding.
    All Modbus RS485 data read back is all FFs and does not change when force is applied to the load cell. The amplifier was working fine for a week until it suddenly started returning all FFs.
    Nothing has changed with the software or connection. The front digital displays the correct reading. The RS485 parameters seemed to be correct otherwise the amplifier would not respond.
    Is it possible the amplifier has lost its settings and needs to be reset? The manual indicates function code 0 x 05 supports "restore factory settings" but does not give instructions.
    From: yohya | Date: 17/07/2023
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    ATO Responded
    Regarding the reading and writing of 485 communication data: Communication adopts MODBUS-RTU format; address field + function field + data field + check field.
    The instrument parameters are all 32-bit data, the high bit comes first, and the low bit comes after. If the first bit of the high bit is 1, the value is negative.
    If positive:
    Read value = high register multiplied by 65536 + low register
    If negative:
    Read value=(high register-FFFF)*65536+(low register-FFFF)-1
    This complement calculation requires you to write a program in the PLC program.
    If there are more questions, please take a video showing us your issue, so that we can further help you to solve the problem.
    Thanks for your understanding.
    You can send us the large video file via wetransfer.com.
    Calibration of load cell
    Can you please assist me? I am unable to get a good calibration.
    We have purchased: ATO-LCTR-OAR (MODEL 610-A1) Load cell Amplifier,
    ATO-LC-S01 *(10Kn) S Type Load cell
    I connected the load cell and powered the transmitter
    I set Parameter 01 SL (zero point) at 00000
    I set Parameter 02 SH (load calibration value) at 107.23
    I placed 107.23 Kilograms of calibration weight on S type load cell
    I set Parameter 04 SD (decimal place) at 2
    I removed the calibration weight
    I exited programming.
    When I place the calibration weight on the load cell the display now shows me 466.14 instead of 107.23. What am I missing in programming?
    From: avery | Date: 17/07/2023
    Was this review helpful? Yes No (0/0)
    ATO Responded
    Thanks for your update, since your load cell range is 10Kn=1000kg, you need to set Parameter 04 SD (decimal place) at 1, it can only be set to 1 decimal point. You could re-calibrate, and test again.
    Modbus register for baud rate
    Plase confirm the address for Modbus register where baud rate is changed. We use the map as supplied in the downloads, but the data registers we read does not seem to correspond, and we do not want to write to a wrong register.
    From: Tom | Date: 27/07/2023
    Was this review helpful? Yes No (0/0)
    ATO Responded
    The address of the baud rate is 00 56, and you can use the 10 command to write.
    What is the maximum load capacity (in newtons) of the load cell?
    Was there a set capacity, or does it change based on the setting? How do you change it?
    From: Grace | Date: 01/08/2023
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    ATO Responded
    The capacity can be changed. You can refer to "III. Operation Instruction" in the manual for steps.
    What should I do?
    I recently purchased a digital load cell amplifier with output signal 0-5V & RS485. I have a Siemens S7-1200 PLC with a Communication Board CB 1241, allowing RS485 communication. Can I get assistance in determining what specific hardware I need for wiring the A B output of the amplifier to the connections of the CB 1241?
    From: Shaun | Date: 03/08/2023
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    ATO Responded
    The digital load cell amplifier with output signal 0-5V & RS485 you purchased can be connected to a Siemens PLC module with 485 communication. Please connect the load cell amplifier output terminal A/B to the two terminals TR/A and TR/B on the PLC module, and then you need to set the 485 communication parameters and program independently in the PLC program. You can refer to the attached load cell amplifier RS485 communication protocol and the case of Siemens PLC485 programming.
    Please refer to this video to set the 485 communication parameters of amplifier: https://www.youtube.com/watch?v=zP6Ak46DrWw&list=PLlo8RulDRnth25OFq-RKmYSKG9zkpeAZB&index=6
    How to calibrate on the negative side?
    I need to calibrate my ato load cell and amplifier in tension rather than compression. I have followed the steps online but those all pertain to a mass loading the cell in compression, but i need the opposite. Can you instruct me how I can calibrate on the negative (tension) side?
    From: Phill | Date: 17/10/2023
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    ATO Responded
    If you calibrate a load cell and amplifier in tension rather than compression, they all operate the same way.
    The only difference is that before calibrating, you need to adjust the green/white signal line so that the amplifier displays a positive number before calibrating.

    For example, if the compression on the amplifier currently displays a positive value, then you need to swap the green/white wire of the modulation signal line so that the tension becomes a positive value and then calibrate.
    A couple questions
    I am running into problems with the 0-10V output from the 610-A1 box. Specifically at higher loads the voltage entirely drops out. Do you know why this would happen?

    A couple other smaller questions:
    How is the transmitting range affected by multiple summed load cells?
    Is there a delay on the 0-10V output from the 610-A1?
    From: Logan | Date: 06/11/2023
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    ATO Responded
    1. The voltage of 610-A1 entirely drops under higher load, which may be caused by strong electric field interference.
    2. Multiple summed load cells have No effect on transmission range.
    3. The 0-10V output from the 610-A1 has No delay.
    How do I debug it?
    This setup is measuring the force applied by an arbor press, so I’d consider the speed to be slow and the force applied very gradual. In short, we are using these load cells underneath a pressure plate on an arbor press to estimate press force.
    From: jason | Date: 08/11/2023
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    ATO Responded
    Please try the following debugging methods:
    1. Increase the filtering of the transmitter (please refer to the attached video)
    2. Reduce the collection speed a little. Refer to instruction manual P2 for collection speed adjustment.
    How to fix it?
    The indicator doesn't display anything unique. When it get power it display normal. When a weight is loaded its value remains displaying zero, there is no even a tiny fluctuations on the display when a weight is put on the scale. We have crosscheck the problem is not on the loadcell, we calibrated it, we even tried reset procedure you told recently. Despite all effort it remains dysfunctional. How to fix it?
    From: Lucas | Date: 16/11/2023
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    ATO Responded
    We believe that the sensor was Not calibrated successfully, causing the data to display abnormally. Could you please tell us what is the Kg range of the load cell connected to this amplifier? Please note: During calibration, the weight of the calibration weight must be at least 10% of the load cell range.  For example, if the load cell you use is 500Kg, then the calibration target weight must be at least 50Kg during calibration and cannot be less than 50Kg. Otherwise, the amplifier can Not write the value and the calibration can Not be successful.
    Digital Load Cell Amplifier
    The full capacity of the scale is 50kg. So the sample weight is well above the minimum requirement. I don't think it is related with calibration because it was initially calibrated and working properly before this happen.
    From: Henry | Date: 23/11/2023
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    ATO Responded
    Okay, but we checked your calibration video and noticed that the sample weight you wrote was 10Kg, without a decimal point.  You can set 1 decimal place and recalibrate the test. When entering the sample weight, enter "10.0."Also, after completing the calibration, could you try it with another normal load cell to rule out whether it is the amplifier issue?
    Digital Load Cell Amplifier
    Do I need to buy wires for the digital load cell amplifier, output 4-20mA/0-10V/RS485? I'm wondering if it is included with the amplifier. If not I need to buy one I guess.
    From: Levis | Date: 27/11/2023
    Was this review helpful? Yes No (0/0)
    ATO Responded
    Yes, in addition to the load cell cable, the amplifier’s power cable and signal cable need to be provided by the user, so these wires need to be purchased by the user.
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