Hi Crap,
You must be using SCXI-1160 or SCXI-1161 with terminal block of SCXI-1324. You might want to get started looking at SCXI-1160/1161 examples that ship with NIDAQ 6.9.0.
In labview you can browse the examples...look for Data Acquisition->SCXI and browser to SCXI-1161 or SCXI-1161 examples.
Turning something ON and OFF for some period of time is the matter of sending decimal/binary pattren that represent the state of 16 relays on the module.
hope this helps,
A Rafiq
National Instruments