HW Solution for Relay Control

[j_holguin]

Hey folks, 

I am designing a new PXI chassis to provide command and control to some relays in an external server rack.  I am looking for a recommendation on a PXI card (it can be any interface/bus as I have not selected a chassis backplane or controller yet) to command and control these external relays.  The problem that I am running into is the HW solutions that I have seen under voltage outputs can only supply/withstand relatively low amperages.  

I am trying to command and control 16 SPDT relays in an interconnected server rack, the coil voltage is 12 VDC, but I can accept as low as 10 VDC (operating voltage of the coil is 9VDC).  Each coil requires 1.2W/100mA of power.  From what I have seen a lot of cards can only supply up to 1mA of current per channel.  Any Help/suggestions is greatly appreciated!

[crossrulz]

I would probably use a NI-9476 in a cDAQ or cRIO. It has 32 channels. The specifications claims it can handle 200mA at 30V. You will need to supply your own 12V. I've done something similar to control a 24V relay.

[santo_13]

PXI-2567 - NI is the card designed to control external relays.

It can drive 12V at 100mA, you need external 12V supply as the internal can supply only up to 500mA and you got 16 relays.