Hello,
The specs on that card has the maximum output sustainable output as 1-10K Words a second. A word is 8 lines on that board. So, it looks like the fastest you will be able to output a board for a single channel will be 125 to 1250 bits a second. So, that board should work out for you if you need a real slow clock.
You may want to look into a counter timer module, it costs a little bit less then a 6533.
Doug