usb 6009 digital output Query

[Sandeep_k]

Hi everyone,

I need to control a frequency controller using the USB 6009 DAQ card. This controller has a terminal at which when 24V DC is applied, it basically "starts". 

I was told to generate a digital output thru any of the DAQ's output ports and send it onto the controller's terminal and the controller would start. The controller basically needs only a pulse(24 V) to terminal of the controller in order for it to start.Further pulses do not have any effect.

I tried configuring a digital output and then made its state HIGH. When I run the application and put a multimeter across the DAQ's terminal to measure the voltage its generating, I dont get anything. Where am I going wrong and/or is there an easier way to do this ?

How do I go about it ?  I have attached a small datasheet of what I require.

Cheers,

Sandeep

[Dennis_Knutson]

Who told you that you could output a 24 volt signal from the 5 volt USB 6009?

[Sandeep_k]

Someone I know from work who has worked on LabVIEW before suggested I do this. So what's the best way to send a 24V pulse from the DAQ ?

Will I need to use an external power supply for this ?

Its the first time I am working with LabVIEW and related components, so please bear with me if I ask too many useless queries.

[Dennis_Knutson]

You can't send a 24V pulse from the 6009. You will need an external 24V source. You could use a 5V relay, driven by the 6009 to connect/disconnect the source. If you use a relay, pay attention to the current requirement and what the 6009 can source.

p.s. You can also slap your coworker on the side of the head.

Message Edited by Dennis Knutson on 07-15-2009 10:26 PM

[Sandeep_k]

Thanks for both the suggestions mate.