Sinking and Sourcing - Laptörténet

Bkbadmin: Új oldal, tartalma: „category:Fogalmak Edu
2017-05-06T12:11:29Z

Új oldal, tartalma: „category:Fogalmak <categorytree mode=all style="float:right; clear:right; margin-left:1ex; border:1px solid gray; padding:0.7ex; background-color:white;">Edu</categ…”

Új lap
[[category:Fogalmak]]
<categorytree mode=all style="float:right; clear:right; margin-left:1ex; border:1px solid gray; padding:0.7ex; background-color:white;">Edu</categorytree>

== Sinking and Sourcing ==

[http://digital.ni.com/public.nsf/allkb/A10122C63A7F5CFE86256B4C007491DD http://digital.ni.com]

What Is the Difference Between the Terms Sinking and Sourcing?

Hardware: FieldPoint, Digital I/O (DIO), Compact FieldPoint, Multifunction DAQ (MIO)

Problem:
I am setting up the digital inputs and outputs on my system, and I want to make sure that I have enough current to drive the correct digital level. How do I know whether to use the sinking or the sourcing digital I/O?

Solution:
Sinking and Sourcing are terms used to define the control of direct current flow in a load. A sinking digital I/O (input/output) provides a grounded connection to the load, whereas a sourcing digital I/O provides a voltage source to the load.

Consider a simple circuit that consists of one digital input connected to a digital output. The circuit needs a voltage source, a ground, and a load. A sourcing digital I/O provides the voltage needed for the circuit. A sinking digital I/O provides the ground needed in the circuit. The digital input provides the load required for the circuit to work.

Figure 1 shows a sinking digital output that is connected to a sourcing digital input. In this circuit, the load is pulled to ground because of the sinking digital input provided.
Figure 1: Sinking Digital Output Circuit
[[Fájl:SinkingOutput.png]]

Figure 2 shows a sourcing digital output that is connected to a sinking digital input. In this circuit, the load is pulled up to receive voltage because the sourcing digital input has been provided.
Figure 2: Sourcing Digital Output Circuit
[[Fájl:SinkingInput.png]]

Because both a voltage source and a ground reference are needed in order to create a complete circuit, you must have a sourcing input or output connected to a sinking output or input. If you wish to connect a sourcing input to a sourcing output or a sinking input to a sinking output, you will need to add an additional resistor. For further information on connecting two I/O of the same type, please refer to