Generating -5V and +5V from PCI 6024e Card

[AbbasH]

Hello everyone,

The PCI-6024 encoder card has two +5V output voltages, and I need to connect a measurement amplifier circuit (Messverstärkerschaltung) that requires both -5V and +5V as supply voltages.

I am considering connecting a negative (ground) pin to one of the +5V outputs and the other ground pin and +5V output to the circuit, effectively displacing the zero point to achieve -5V and +5V. Would this setup damage the card or is it feasible?

I have 2 other options to consider:

 have two options to consider:

1. Instead of connecting the pins of the card directly, I could solder wires that are connected to the pins together on a circuit board and that way get +-5V.
2. We have two 5V outputs from the card. I could combine them to get 10V and then use a voltage divider with two resistors to get the individual 5V back. The midpoint (after the first resistor) would serve as the ground for the measurement amplifier circuit, allowing us to achieve ±5V.

Which setup is recommended? Is there a better solution?

Thank you in advance for your assistance.

Best regards,

Abbas

[santo_13]

Those are not isolated +5V to mix and max to generate +/-5V or +10V, so what you said is possible only with isolated supplies like battery but not for the output of PCI-6024.

[AbbasH]

Thank you for your response.

Do you know if there is any feasible way to get +-5V from the card?

Abbas

[santo_13]

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@AbbasH wrote:

Thank you for your response.

Do you know if there is any feasible way to get +-5V from the card?

Abbas

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What is the current requirement from this +/-5V rails?

[AbbasH]

Thank you for your response.

Estimated total current requirement of about 1.35 mA to 2 mA per rail for the ±5V supplies.

Abbas

[santo_13]

RSO-0505D seem to be a great fit for your needs to generate a split +/-5V rails from a single +5V from the PCI card.

https://www.digikey.com/en/products/detail/recom-power/rso-0505d/2256506