4 Wire Electrical Wiring Diagrams. The white wire becomes the energized switch leg as indicated by using black or red electrical tape. In a 2 wire current loop the transmitter dc power supply and plc are connected in series.
A 4 wire transmitter has 2 wires connected to a power supply and 2 signal wires connected to the plc. Typical controller markings typical elementary diagram iec typical controller markings typical elementary diagram table 4 control and power connections for across the line starters 600 v or less from nema standard ics 2 321a60 1 phase 2 phase 4 wire 3 phase line markings l1 l2 l1 l3. In a 2 wire current loop the transmitter dc power supply and plc are connected in series.
A wiring diagram usually gives more information about the.
A simplified conventional pictorial representation of an electrical circuit. Print the wiring diagram off in addition to use highlighters to be able to trace the routine. A house wiring diagram is usually provided within a set of design blueprints and it shows the location of electrical outlets receptacles switches light outlets appliances but is usually only a general guide to be used for. Rc red wire power 24 vac rh or 4 red wire jumpered power 24 vac w white wire for heating enable y yellow wire for cooling enable g green wire controls fan on auto.