A Activity diagram used in UML 6/9 and SysML B Bachman diagram Booch used in software engineering Block diagram Block Definition Diagram BDD used in SysML C Carroll diagram Cartogram Catalytic cycle Chemical equation Curly arrow diagram Category theory diagrams Cause-and-effect diagram Chord diagram Circuit diagram Class diagram from UML 1/9 Collaboration diagram from UML 2.0 Communication diagram from UML 2.0 Commutative diagram Comparison diagram Component diagram from UML 3/9 Composite structure diagram from UML 2.0 Concept map Constellation diagram Context diagram Control flow diagram Contour diagram Cordier diagram Cross functional flowchart D Data model diagram Data flow diagram Data structure diagram Dendrogram Dependency diagram Deployment diagram from UML 9/9 Dot and cross diagram Double bubble map used in education Drakon-chart E Entity-Relationship diagram ERD Event-driven process chain Euler diagram Eye diagram a diagram of a received telecommunications signal Express-G Extended Functional Flow Block Diagram EFFBD F Family tree Feynman diagram Flow chart Flow process chart Flow diagram Fusion diagram Free body diagram G Gantt chart shows the timing of tasks or activities used in project management Grotrian diagram Goodman diagram shows the fatigue data example: for a wind turbine blades H Hasse diagram HIPO diagram I Internal Block Diagram IBD used in SysML IDEF0 IDEF1 entity relations Interaction overview diagram from UML Ishikawa diagram J Jackson diagram K Karnaugh map Kinematic diagram L Ladder diagram Line of balance Link grammar diagram M Martin ERD Message Sequence Chart Mind map used for learning, brainstorming, memory, visual thinking and problem solving Minkowski spacetime diagram Molecular orbital diagram N N2 Nassi Shneiderman diagram or structogram a representation for structured programming Nomogram Network diagram O Object diagram from UML 2/9 Organigram Onion diagram also known as "stacked Venn diagram" P Package diagram from UML 4/9 and SysML Parametric diagram from SysML PERT Petri net shows the structure of a distributed system as a directed bipartite graph with annotations Phylogenetic tree - represents a phylogeny evolutionary relationships among groups of organisms Piping and instrumentation diagram P&ID Phase diagram used to present solid/liquid/gas information Plant Diagram Pressure volume diagram used to analyse engines Pourbaix diagram Process flow diagram or PFD used in chemical engineering Program structure diagram R Radar chart Radial Diagram Requirement Diagram Used in SysML Rich Picture R-diagram Routing diagram S Sankey diagram represents material, energy or cost flows with quantity proportional arrows in a process network. Sentence diagram represents the grammatical structure of a natural language sentence. Sequence diagram from UML 8/9 and SysML SDL/GR diagram Specification and Description Language. SDL is a formal language used in computer science. Smith chart Spider chart Spray diagram SSADM Structured Systems Analysis and Design Methodology used in software engineering Star chart/Celestial sphere State diagram are used for state machines in software engineering from UML 7/9 Swim lane Syntax diagram used in software engineering to represent a context-free grammar Systems Biology Graphical Notation a graphical notation used in diagrams of biochemical and cellular processes studied in Systems biology System context diagram System structure Systematic layout planning T Timing Diagram: Digital Timing Diagram Timing Diagram: UML 2.0 TQM Diagram Treemap U UML diagram Unified Modeling Language used in software engineering Use case diagram from UML 5/9 and SysML V Value Stream Mapping Venn diagram Voronoi diagram W Warnier-Orr Williot diagram Y Yourdon-Coad see Edward Yourdon, used in software engineering
The way I heard it, an engineering guy told the marketing people that it didn't matter, having a "live zero" was in fact, an advantage. But back to 24Vdc. Some military vehicles and diesel trucks used two 12 Vdc batteries, some aviation electronics were run at 24Vdc, but why industrial sensors and valves picked 24Vdc isn't clear to me.
24VDC. Our control outputs are almost always transistor outputs. The reason is simple: Long life and high speed sensing and switching. 24VAC can be used but is much less common because sensors and outputs would be sending a pulse train to whatever they were wired to, due to the constant zero voltage crossover. The only advantage I can think of ...
Interposing relays for 24VDC control of 120VAC or 125VDC are used everywhere. Wire type and insulation must exceed the working voltage. The different voltage levels must be separated and identified:\ in different wireways wiring on one side of relay will be 24VDC and the other side will be the higher voltage wireways labeled as to voltage
I guess the more direct question is: What colors should I use for 24 , 24 , and control on a floating 24V DC system?
We always use 24Vdc for control circuitry, and use 110Vac for contactor coils etc. (24Vdc coils generate so much heat when energised). Panels are designed so that 110Volt equipment is located together and away from 24vDC to alleviate interference and for safety.
soyxan, The general practice is not to run AC and low level DC (usually defined as less than 50 VDC) in the same conduit, but like everything in life there are very few hard and fast rules. The real problem arises when there is high current flowing in either circuit, and particularly if that current is being switched off and or on, and how long the conduit is that the two circuits are run ...
In DCS, we are using external Weidmuller Phoenix 230VAC to 24VDC PSU as an interrogation supply for Digital Inputs. from 24VDC PSU is extended to the field limit switch contacts, and return supply is connected to the DI module having 24VDC from the PSU as reference. Please advise the best...
I need to power a 24vdc fan that draws 80ma and 2W. I have a 24vac supply. What is the best way to rectify it?
what is the bizarre history behind the standard industry practice of blue color wire for all 24VDC wiring in an industrial control panel (with the exception of a grounded 0 volt negative) and then all wire is identified with wire number labels to help in troubleshooting down the road.
I think the critical parameter here is if the 24VDC fuse will open the 120VAC circuit in the face of the high voltage and probably lower source impedance (more power to keep the current flowing through an arc as the fuse blows).
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