john.sheppard
2008-07-10 15:40:18 UTC
Hello,
I have a question related to the NI 9264 analog voltage output module. I am using this module with a compact DAQ interface in LabView 8.2.1, and am trying to output a signal to activate a Solid State Relay (Magnecraft - part number 861SSR115-DD-1). I understand that the 9264 module has a maximum output current of 1 mA and this is too small for the current required to activate the relay. The minimum input current for this relay is listed as 12 mA; however we have used a PCI-based DAQ with a 68-pin connector in the past successfully, even though the PCI card was limited to 5 mA output (NI DAQcard 6062E family). I spoke with a product engineer from Magnecraft and it seems that 5 mA was enough to activate the relay despite being below the lower spec (12 mA).
The result of all this is that if I output 10V from the output module, I will read 10V with a voltmeter but once connected to the relay, the voltmeter will only read 2.25V, so 2.25V seems to be the maximum voltage without exceeding this limitation on output current. The lower spec for voltage input is 3.5 V on the relay so I will need to get close to this to get it to work. I am open to any solutions you may have regarding this issue. I'm sure the signal could be amplified in some way externally, but I don't know if there is a more direct approach or whether NI carries any relays or other products that might be useful with such a small output current. At this point I need to use the compact DAQ board with this module if at all possible, rather than relying on the older 6062E type setup.
Any ideas or help you could provide would be greatly appreciated.
Thanks for your time,
John Sheppard
I have a question related to the NI 9264 analog voltage output module. I am using this module with a compact DAQ interface in LabView 8.2.1, and am trying to output a signal to activate a Solid State Relay (Magnecraft - part number 861SSR115-DD-1). I understand that the 9264 module has a maximum output current of 1 mA and this is too small for the current required to activate the relay. The minimum input current for this relay is listed as 12 mA; however we have used a PCI-based DAQ with a 68-pin connector in the past successfully, even though the PCI card was limited to 5 mA output (NI DAQcard 6062E family). I spoke with a product engineer from Magnecraft and it seems that 5 mA was enough to activate the relay despite being below the lower spec (12 mA).
The result of all this is that if I output 10V from the output module, I will read 10V with a voltmeter but once connected to the relay, the voltmeter will only read 2.25V, so 2.25V seems to be the maximum voltage without exceeding this limitation on output current. The lower spec for voltage input is 3.5 V on the relay so I will need to get close to this to get it to work. I am open to any solutions you may have regarding this issue. I'm sure the signal could be amplified in some way externally, but I don't know if there is a more direct approach or whether NI carries any relays or other products that might be useful with such a small output current. At this point I need to use the compact DAQ board with this module if at all possible, rather than relying on the older 6062E type setup.
Any ideas or help you could provide would be greatly appreciated.
Thanks for your time,
John Sheppard