I was going to try the quick and dirty approach of ordering a bunch of 2.2k resistors, connecting one end to the 0v pin etc.
Basically replicating the schematic in the manual (attached). I never had an option to specify input/output from the supplier of the board. They seem to be harder to get hold of in the UK, I'm pretty sure the supplier eventually shipped this from the states. Wayne Merricks The Voice Asia On 17/08/12 17:15, Michael Barnes wrote:
The MC PCI DIO24 is a very versatile card. It can be used as inputs or outputs. The lack of pull-up/down resistors indicates the use was not specified when the board was purchased, or that it was purchased as an output card. You'll see three rows of ten holes each. You can get SIPs from Measurement Computing. You want a nine pin sip. Notice that one end of the row is labelled HI and the other end is labelled LO. The SIPs have one end labelled as common. You orient the SIPs so the common pin goes into the HI or LO hole depending on if you want pull up or pull down. (Pull up is most common.) So that uses nine of the ten holes. Leaving it open can yield unpredictable results when used as an input card, as you have already found out. While you can get SIPs at Digi-Key and the like, I suggest getting them from Measurement Computing to insure you get the right ones, as spacing and number of pins may vary from other vendors. HTH, Michael
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