ADLINK PCI-7260 - Manual (Page 43)

Operation Theorem 33
external circuit. The maximum output current of the on board iso-
lated power is 170mA (@40?). Please pay attention to the current
consumption of the external circuit not exceeding the limit. The dry
contact architecture is shown in Figure 4.3.
Figure 4-5: Dry contact
4.5 Interrupt Architecture
PCI-7260 has a powerful dual interrupt routing scheme including
change-of-state detection and interrupt sources on digital input
channel 0 and channel 1. Using these interrupts well can make
you handle more complicated information from outside enviroment
and release your computer from a heavy burden in dealing with
digital input data. Note that the dual interrupts do not mean the
card occupies two IRQ levels.
There are two interrupt modes in PCI-7260, but you can only
choose one of them at one time. Table3.2 shows all of the combi-
nations of interrupt modes.
4.6 Change of State(COS) Interrupt
What is COS?
The COS (Change of State) means either the input state(logic
level) changes from low to high, or from high to low. The COS
detection circuit will detect the edge of level change. In the
PCI-7260 card, the COS detection circuit is applied to all the
input channels. When any channel changes its logic level, the