I am looking for information on working with a Bentley Nevada 330400/425 accelerometer. Our setup involves wiring into a Flex IO 1794 IE8 module, with power connected to C-34, positive to A-12 (input 6), and negative to B29 common (input 6). The shield is grounded. However, we are experiencing issues as we only see a reading of 1.2mA and 2016 raw counts with no change when the sensor is activated. Connecting to just the fluke yields a reading of -8.43V, which aligns with the manual and shows changes when the sensor is activated. We have double-checked the wiring based on the manuals provided by Flex IO and Bentley Nevada, as well as inspected the fuses. Can anyone offer insight into why we are unable to see the signal through the Flex module? Thank you.
For improved sensor performance, link the B lead of your sensor to the negative/common terminal B-29, and connect the C lead to the power 24VDC terminal C-47. Next, connect the A lead to the current input 6 terminal A-12 on your Flex IO system. Lastly, ensure to connect the shield cable to C-45 for optimal operation. This setup will maximize sensor functionality and accuracy in your industrial setup.
After reviewing the manual, it appears that the sensor is not a 4-20mA type but rather an mV transducer designed for use with Bently monitoring systems.
Thank you for the input. After reviewing it, it appears that a different sensor may be necessary. Robertmee, I believe we should consider exploring alternative sensor options.
From your description, it seems like you have done diligent troubleshooting. If you haven't already, you could try swapping out with another Flex IO 1794 IE8 module, if you have one available, to see if the issue lies there. Occasionally, these modules may exhibit such behaviors due to internal faults. Also, ensure that the module and accelerometer are compatible with each other in terms of signal range. An incorrect range can cause the kind of inconsistencies which you're describing. Lastly, try recalibrating the accelerometer with the module connected, sometimes signal conversions might not align perfectly. It's just a thought, though. Hope it helps!
Based on your description, it sounds like you've been pretty thorough in your troubleshooting already. However, let's consider a few more possibilities. First, are you sure about the compatibility between your Bentley Nevada accelerometer and the Flex IO 1794 IE8 module? If they're not fully compatible, this might be causing your issue. Also, check the Flex module’s input range settings to be sure that they are within the accelerometer's operating ranges. If they are not, your module won't be able to interpret the signal correctly. Lastly, make sure that the sensor power requirements are met by your Flex module. Without adequate power, the signal might not be carried correctly. Hopefully one of these points will be helpful for you.
It sounds like you've done quite a bit of troubleshooting already. Given the symptoms you've described, you might be dealing with an impedance mismatch issue between the accelerometer and the Flex IO module. If the input impedance on the Flex IO module is too low, it could be loading down the accelerometer output causing the reduced readings. I'd suggest checking the specifications for both devices. Another possible issue might be the power supply – have you verified the power supply is operating within the correct range for the accelerometer? Finally, ensure that you're not facing any grounding issue that could be affecting the signal.
It seems like you've covered quite a lot in your troubleshooting process. Now, when it comes to Flex IO 1794 modules, I've experienced that sometimes noise interference can cause issues with the readings. This could be the result of EMI/RFI disruption. Have you checked for possible noise pollution in the system? Also, consider the type and length of the wire you're using, as this can impact readings. I'd recommend further checks for calibration also, just in case there's been a shift, and confirm whether the problem persists with another, known-to-be-working module.
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Answer: This issue could be due to incorrect wiring or configuration settings. Double-check the wiring connections and ensure they are aligned with the manuals provided by Flex IO and Bentley Nevada. Additionally, verify the configuration settings on the Flex IO module to ensure they are correctly set for the accelerometer.
Answer: The discrepancy in readings could be attributed to potential issues with the Flex IO module itself. It is recommended to inspect the module for any faults or malfunctions that may be affecting the signal transmission from the accelerometer. Additionally, ensure that the module is compatible with the Bentley Nevada accelerometer.
Answer: To troubleshoot the signal connectivity issues, start by systematically checking each component and connection point. Verify the wiring connections, inspect the fuses, review the configuration settings on the Flex IO module, and ensure compatibility between the accelerometer and the module. If the issue persists, consider consulting technical support from Bentley Nevada or the manufacturer of the Flex IO module for further assistance.
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