Differences between NI-9472 and 9481 module

[RJ_15]

Hi,

Can anyone tell me what is the major difference between the two modules?

[Dennis_Knutson]

https://www.ni.com/en-us/shop/model/ni-9472.html

https://www.ni.com/en-us/support/model.ni-9481.html

You don't know what a digital output is versus a relay?

[RJ_15]

I do know the difference between the two concepts.

But in my application, I am automating the functionality of a rotary switch that has 4 outputs (28VDC). To do this, I can use any one of this module as essentially both of them will do the same thing.

So I wanted to know, which module should I prefer to use for my application.

[JarleEkanger]

you should read the operation manuals and instruction of the two modules, and the specification of whatever your switch-to-be-automated is connected to. What will be the current draw by that device? Can the 9472 or 9481 handle that? or can both handle it?

I would summarixe the difference between the two like this: the 9472 is designed to drive 24V logic (which can be assumed to not necessarily draw large currents), and the 9481 is relay that you use to switch on and off power to a device/light buld etc.

[RJ_15]

Both are sufficing my current drive capabilities.

Only one thing is there that I need to consider is , 'my output signal is open ended' when in not connected state.

So, whether the output from NI-9472 is open ended or grounded when the Channel is off ?