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- #391,954 in Industrial & Scientific (See Top 100 in Industrial & Scientific)
- #353 in Signal Converters
Description
Module function: 0Hz to 10KHz frequency pulse signal into 0-10V or 0-5V analog voltage signal.
Can be used for PLC and inverter interface between the conversion, or motion control card and inverter interface matching control occasions.
Input pulse level is 5V,12V,24V can be directly input, no need to string resistance. But the input signal frequency, to maintain more than 0.5 seconds.
The output current is 5mA. The input power supply voltage range is DC12-30V.
Instructions for use:
1, Multi-turn potentiometer is used to calibrate the frequency and voltage of the corresponding relationship.
2, The input power supply voltage range of DC12-30V.
4, For the use of PLC, support NPN type. Must have ground wire.
5, If used with the encoder, the encoder constant speed required to continue to rotate more than 0.5 seconds.
6, FV conversion module, the response time of about 0.3-0.5 seconds
Note:
1. Accuracy is 1percentage, can not be accurate to the decimal point after the two digits, if the use of high precision requirements are not recommended
. 2. You can adjust the blue potentiometer on the board to calibrate (in the factory, we have FV potentiometer to adjust a certain correspondence, generally do not recommend self adjustment).
3. If the signal input is turbine flow, due to signal matching reasons, to add a 817 optical coupler and a resistor in order to make the flow meter to function properly.
Package Included:
1pcs NOYITO Frequency To Voltage Conversion Module
Jim
Reviewed in the United States on September 10, 2024
Not one diagram or any paperwork to wire up.
ivan
Reviewed in the United States on July 6, 2021
12 V across the encoder input pins. what
David J. Brunell
Reviewed in the United States on August 28, 2020
This is a decent module that performs well. In my limited testing, it showed a fairly linear correlation between frequency input and voltage output. However, there is one thing you need to be aware of. The units which claim to have a 0-5V output will continue to increase output voltage if you increase the input frequency beyond the end of the range. For example, I have the 0-1KHz, 0-5V module. If I apply 1.15KHz to the input, I get 5.75 volts output. I was able to get output voltages over 10 volts with high-enough input frequencies. If you are attaching the output of this device to a microprocessor A/D input, you need to provide proper input protection. These modules may actually all be the same, with calibration being the only difference.
Customer
Reviewed in the United States on October 17, 2020
OK, so this module is based on classic LM331 IC configured in F-V mode. You can find complete schematic in LM331 datasheet with minor changes in actual implementation. Manufacturer was determined to hide all IC markings in PCB design, so all IC's have been sanded to remove original printed identifications.PCB implementation is old with very poor layout planning. Layout recommendations from IC manufacturer are basically ignored; with various components randomly placed on board, with trace routing basically wild and without consideration for cross-talk or intelligent management of layout. Many traces run under or around other components to destinations; when a little pre-layout planning could have made implementation much more efficient with improved performance. The use of obsolete DIP style LM331 IC is very interesting, especially when other components in design are surface mount. Guessing designer got great deal on very old date coded IC's.The only addition to circuits (not directly from datasheet application circuit) is an operational amplifier buffering output, configured as non-inverting (SOIC-8 package IC on PCB). Op-amp used as output buffer with discrete zener-diode based bias on negative input resistor. And voltage regulator LM78M12; which is medium power 12VDC regulator for entire board.Interface connector is severely oversized for use (pins most likely rated for 10A or more). Again, designer got great deal on obsolete new-old stock. PCB implementation could have been much more compact using components better suited for circuit and use. Obviously designed from NOS components for lowest cost and convenience.FYI, circuit can be modified in any way suitable for LM331 implementation. This implies PCB components can be modified to alter circuit functionality and performance (contrary to what manufacturer states).
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