Digital output is not 5V when connected to a circuit

I have a very simple circuit I want to operate a valve. I have a NI USB 6008 with 12 digital i/o ports, a KF0602D solid state relay, 12V power and a solenoid valve.

The idea behind this circuit is pretty simple: use a digital line of the 6008 to close or open the switch in the KF0602D. With the switch closed, current flows from the power supply through the switch, to the valve and that opens. When the switch opens no current flow and the valve closes.

When I plug my 6008 in the KF0602D, however, my 'high' digital output falls from 5V to 1.73V. It's a problem because my switch requires at least 3V to close. I don't know why the voltage decreases because the relay is supposed to just on 3mA current with an input 5V, wells in the area of the specs listed 6008. What can I do to make this work?

Outputs digital USB-6008 are drain opened with pull-up 4.7 kohm resistors. This will NOT lead your SSR entry requiring > 2 my.

He must reverse the polarity of your control signal. Wire-entrance of the Republic socialist Soviet to the line of the 6008.  Wire the + input of the Republic socialist Soviet to + 5 V. Then you have the 8.5 my driving ability to do what you want.

Lynn

Tags: NI Hardware

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