官方文档中不同DO板卡输出类型不同,有Sink(NPN)和Source(PNP)两种。 图1 DO板卡的两种输出模式 问题: 按照下图接好板卡和继电器线路,在labview程序中控制IDO1为数字量“1”,则右侧继电器管脚5 接9or悬空? 图2 1734外接继电器原理图 分析: 下面是1734板卡内部原理图,虚线左侧为内部电路,右侧为板卡外部电路。 由...
We have two types of proximity switches (PNP – NPN): Electrically, a PNP type of proximity switch outputs the current from the sensor with (+) voltage. An NPN type ofproximity switchreceives the current to the sensor with (-) voltage. As shown in Fig. (1). Figure 1 Structure of Si...
The lateral pnp bipolar transistor has an emitter region and a collector region which includes high-density regions and low-density regions, and the emitter region is formed in an n type tub region. In the integrated injection logic circuit, collector regions are surrounded by a high-density p...
PNP v. NPN The concept of “PNP” vs. “NPN” is often confused with sink and source, but these two are not related. Please see the MulteX lesson on PNP v. NPN
in general i say if current is comming out of PLC I/O is called source o/p and If going into I/O it is called Sink,say fashoin in which 24 vDC connected to In/Out ,Like PNP/NPN connection in PLCSinking -NPN - provides path to 0VDCSourcing -PNP -provides path to 24VDCregards,...
Cylinder Type Inductive Proximity Sensor Switch NPN PNP No Nc No+Nc Lm12 US$2.00 / Piece SSR Relay 4-20mA 0-10V 0-5V Single-Phase Intelligent AC Power Regulation and Voltage Regulation Module SCR Power Voltage Regulator US$30.00 / Piece Heat Seal HS Filter ...
By comparison, the cascode CCS is far less likely to become unstable. Using Transistors as Active Loads for Valves All the previous sink circuits can be mirrored about 0 V and PNP transistors substituted for NPN. If the circuit is then connected to the HT supply, all the previous sink ...
Cylinder Type Inductive Proximity Sensor Switch NPN PNP No Nc No+Nc Lm12 US$2.00 / Piece SSR Relay 4-20mA 0-10V 0-5V Single-Phase Intelligent AC Power Regulation and Voltage Regulation Module SCR Power Voltage Regulator US$30.00 / Piece ...
When choosing the type of input or output module for your system (or D L05/D L06/D L105 I/O type), it is very important to have a solid understanding of sinking and sourcing concepts. Use of these terms occurs frequently in discussion of input or output circuits. It is the goal of ...
The interface circuit of the present invention is composed to provide: changeover switch 24 that switches between a connection state in which pull-up resistor 23 is connected to input terminal 22