Answer / cae

Plc basically contains Inputs and outputs along with CPU. programme written in ladder logic or in any other language like FBD,ST,IL it is stored in PLC memory which deals with CPU. Field sensors are connected to the input card of plc as a reference signal or getting feedback from the field by sensors. so according to the logic plc sends a signal to the output card which correspondingly enables the Electrical output,it may be a motor contactor coil or drive through a relay for safe operation and plc sends the output signal with very low voltage level enough to enrgize the relay coil or contactor coil or an SSR(solid state relay) This is the way how plc gives commands to electrical. and ***Communication plays a vital role for plc operation

if there is nutral in phase why we use earthing wire and grounding? even at fault condition the fault current flows to neutral (it is a lower path)

0 Answers  

---

Can I use less voltage cable for neutral, since the voltage of return path is zero ideally?

3 Answers   Vijai Electricals,

---

what is the voltage rating of chiller unit sensors

0 Answers   Voltas,

---

what is the excess air in furnace

0 Answers  

---

HRC full from

6 Answers  

---

---

Which of the following are ill suited for energy efficient motors application?

0 Answers  

---

For a stable system, where should the poles of a system be in a root loci plot?

0 Answers   GE,

---

why fuse not recomended to neutral

10 Answers  

---

send me all basic electrical question and answers

0 Answers  

---

why transformer rating in kva and motor rating in kw

11 Answers  

---

How the value of KVAR of capacitor bank used in switchgears calculated??

2 Answers  

---

What difference between TRANSFORMERS and TRANSDUCERS???

1 Answers  

---