Control HVA converter with ni 9263

[Dykan]

Does anyone know what's wrong here? My current job task is to control the HVA converter(10HVA24-N1-BNC-10KV, Ultravolt) through NI-9263, so as to output 0-10kV voltage to control DMA. However, we have encountered challenges in utilizing these products.

We used pin 1 of HVA converter as the reference voltage pin, and we provided it with a voltage of 10V by NI-9263 ao1. Pin 2 was assigned as the voltage output control pin, and we applied a stepped voltage ranging from 0-10V (such as 1, 3, 4, 6, 8V) by NI-9263 ao2. Additionally, we connected pins 6 and 3 together as the signal ground terminal. Furthermore, the power supply voltage of pin 8 and pin 9 is 24V, provided by a switching power supply that can provide up to 35W. (We assumed the HVA converter only absorbes 1W ).
We connected pin 11 to pin 1 as enable input for convenience , which required more than 2.4V for enable. And all the voltage output signal return grounds were the return of each ao in NI-9263.

Despite these efforts, when measuring the product's output voltage using a voltage divider, we consistently obtained a reading of 0V, which should be 0-10kv corresponding to 0-10V of ao output. Additionally, the feedback voltage measured at pin 4 was also approximately 0V.

For information on the development of the converter, see 10HVA24 HVA converter.

[santo_13]

Could you please post a better schematic diagram of your electrical connections instead of describing in words?

[Dykan]

Here is a schematic diagram 

[santo_13]

Connection looks good. Have you tested the HVA convertor manually without 9263?

[AnalogKid2DigitalMan]

Do you have a link to the manual?

I saw a spec sheet:

https://www.advancedenergy.com/globalassets/resources-root/data-sheets/ultravolt-hvaseries-data-shee...

Looks like pins 2 and 3 are differential, you have pin 2 tied to the 0-10V output whereas pin 2 is the (-) input so you may want to swap pins 2 and 3.

Also pin 11 Enable is TTL level compatible 0-5VDC but you are putting 10V into it so you may have damaged something 😞

-AK2DM

[Dykan]

Yes, I tested it with a dual regulated power supply. But as long as I connect the enable terminal pin11 to any positive pole of the regulated power supply, the enable indicator of HV converter will be on. Regardless of whether the negative pole is connected or not.

[Dykan]

Reply @AnalogKid2DigitalMan

I don't have a manual but some resource information (four pdf files). As shown in the programming guide: "as a matter of convenience, the Enable can be brought to the Vref at pin 1. Pin 1 is 10V reference voltage pin. And I have tried to switch pin 2 and pin 3, for pin 2 as positive voltage input beeing provided 0~+10V, I connected pin 6 and pin3 directly. While pin 3 was regarded as negative volatge output provided 0~-10V, I connected pin 6 and pin 2. The result were the same--0V was output from the HV converter.

[AnalogKid2DigitalMan]

With the dual regulated supply were you able to get high voltage output?

Personally I would bench test it without any of the NI hardware. Once it was established that it works the incrementally start transferring functionality over to the cDAQ's.

-AK2DM

[Dykan]

@AnalogKid2DigitalMan

I useI use the dual regulated power supply to provide two voltage signals of 0~10V to the HV converter.

[santo_13]

You photo doesn't show you've connected COM of the AOs together. Are pins 1, 3, 5 of 9263 connected to GND of HVA? (any AO that you're connecting to HVA, ensure that its COM is connected to GND)