USB 6501

[olivers]

I tutor. Must with Labview 8.5 and USB6501 optical sensors read.
Optical sensors (O-5 V).

But when I connect the sensors to the USB6501 me as 2.4-3.8 V voltage.

Apparently my digital inputs of USB6501 are tri-state and must transform to TTL.

I do not know how to do that.

[AnalogKid2DigitalMan]

olivers:

The 6501 inputs are TTL compatible. What is the make and model number of your sensor? Can you also attach a sketch of how you wired everything up?

-AK2DM

[olivers]

Hello,

I have a optical sensor of Sick: product name WT150-P460

[JÞB]

Datasheet

for the sensor says signal out Vhi will be 1.5V less than Vsource and the device operates from 10 to 30 V.   So, this would indicate that your driving the device with about  half of its rated minimum supply.  Your jpg is too blury for me to make out what your connections are or what is supplying the sensor

[olivers]

I connect 10VDC to the sensor.

When the sensor detects something, I have  + - 10V  output ,   but I  reduce this 10V to 5V by a voltage divider.

So I have up  my input (USB6501) 5VDC. But because my inputs of USB6501 is tri-state, i have  3.8 Vdc.

Therefore I would  to transform tris-state to TTL inputs. But I do not know how?

[AnalogKid2DigitalMan]

olivers:

I do not know where you are getting information that the inputs are tristate, here's the manual:

http://www.ni.com/pdf/manuals/371456h.pdf

On the input a voltage greater than 2.0 volts is registered as a logic high, so it should work. Have you configure the lines you are wired to as an input as opposed to output?

-AK2DM

[olivers]

Because if I want something to read, I have my input USB6501 (5VDC) without anything I connect.

I have programmed as input, and not as output