1. Do you have a product that can provide an output signal of 5 KHz, 50% duty cycle, 20 mA max and 24 V p-p max with no input?
Yes, the API 7500G M03.
2. We have an application which requires a signal conversion of ½ Hz to 6 Hz input to a DC output. Do you have a signal conditioner to do this?
No. The minimum input frequency range that we offer is 0 to 15 Hz.
3. We have a PNP proximity sensor powered by the +18 VDC input loop supply of the Api 7580 G. It reads the flywheel gear teeth and a sends a frequency signal to the API 7580 G and works fine throughout the range. However, if the wheel is stopped with a tooth in-line with the sensor, the output will stay high (PNP output) and the API 7580 G output will go high to the maximum of the range. How can we prevent this?
The +18 volt loop supply from the API 7580 G has a maximum ripple of 1.5 V p-p so the high output from the prox sensor will have this ripple. The signal input to the 7580 G has a capacitor in series so any DC input charges, then opens the circuit. However with the ripple, there will be a 50/60 Hertz signal present.
You must use a magnetic pick-up in place of the proximity sensor since the amplitude signal from the magnetic pick-up will decrease as the flywheel slows down and when stopped, there will be no amplitude even with a tooth in-line with the sensor head. The magnetic pick-up generates its own signal as the field changes. When the field stops changing, the signal goes to zero.
4. Can you provide a module that will generate an output frequency (square wave) that we can vary between 55 and 75 Hz with No input signal?
Yes. Our API 7500 G M03 with a modification to utilize the test circuit that is adjustable with the test range potentiometer. The test circuit is disabled internally and is always on. With the span pot set to the middle of the range, adjust the test range pot to give an output of 65 Hz which is the center point for 55-75 and serves to orient the window. Then, use the span pot to adjust the output frequency from 55 to 75 (the window is actually about 40 Hz). The zero pot and the cutout pot are disabled and have no effect.
5. We have a 4-20 mA signal and want to convert it to a pulsed output of 0-270 pulses/minute so we can drive a counter. Can you do this?
Yes. Convert the output to Hertz (cycles/second) so 270 / 60 = 4.5 Hz. Our API 7500 G SS has an output range of 0-5 Hz and the span pot can adjust down by 10 % to allow for 0-4.5 Hz. The counter, which will trip on either rising or falling edges, can be set up to count at the edge of each cycle (square wave).
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