Sinking sensors allow current to flow into the sensor to the voltage common, while sourcing sensors allow current to flow out of the sensor from a positive source. For both of these methods, the emphasis is on current flow, not voltage. ...
A sinking PLC DI is suitable for PNP field sensor devices and looks for +24 Vdc on the DI channel coming from the sensor switched lead to indicate a logical true condition. A sourcing PLC DI is suitable for NPN field sensor devices and looks for 0 Vdc on the DI channel coming from the...
1,SOURCING=NPN=M-READING=M-LESEND(德语:reading的意思) 2,SINKING=PNP=R-READING=P-LESEND(德语:reading的意思)
To ensure 24 VDC sensors and PLC discrete input (DI) modules are connected properly, one must understand the differences between PNP or NPN style and when or where it makes sense to use each one. Learn the benefits and cautions for each as well as how sourcing and sinking come into play....
The sensor system can be used for4feedback signals+1status signal=5digital PNP/NPN feedback signals.Selection of PNP or NPN is done by a jumper.2of the feedback signals can be external sensors if necessary.The status signal is used for detection of the following:-Set-up is in progress....
Figure 3.NPN sensor wiring diagram as found in a datasheet. What Happens if You Reverse the Wiring? Remember before, we said that PNP must be used with sinking modules, and NPN must be used with sourcing modules? What happens if you connect the wrong combination?
The term ‘NPN’ stands for negative, positive, negative, and also known as sinking.The NPN transistor is a BJT, in this transistor, the initial letter ‘N’ specifies a negatively charged coating of the material. Where ‘P’ specifies a completely charged layer. The two transistors have a...
If a device sends current out, we call it ‘sourcing’. Therefore a PNP sensor is also called a ‘sourcing’ sensor. This is easy to remember because the sensor is the source of the current. If a device accepts current in, then we call it ‘sinking’. That means the sourcing sensor ...