Relay Control System (Normally Open,Held close)

In summary, the conversation discusses a sequential control circuit and its use in a pneumatic cylinder. The different types of limit switches are mentioned and there is a question about the switch's behavior when actuated. It is requested for more information to be provided, such as a schematic diagram or manual, to better understand the problem.
  • #1
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2
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Hi guys, currently i am stuck with the limit switches in the sequential control circuit.

the Normally open,heldclosed, Normally closed,held open , normally closed and normnally open.

Let's say if bo is NO,HC. so the switch will be normally open then once bo is actuated then the switch will be closed?
 
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  • #2
Hi stags! Welcome to Physics Forums!

I cannot understand your question from what you've written. What's "bo" What application is the sequential control circuit being used in? Is there a schematic diagram at some website? Is there a manual of operation with a simple theory of operation?

If you post a diagram of your thought problem members here may be able to assist you.

Bobbywhy
 
  • #3
Hi bobbywhy,

I am talking about pneumatic cylinder so when the cylinder is at retract position it is at the a0 position, when it is at the fully extended position then it will be a1.

The alphabet doesn't matter.
 

1. What is a relay control system?

A relay control system is an electronic device that allows a low voltage circuit to control a high voltage circuit. It works by using an electromagnet to open or close a switch, allowing the flow of electricity to be controlled.

2. What is the difference between a normally open and held close relay?

A normally open relay has its contacts open when there is no current flowing through the coil. When a current is applied, the contacts are closed. On the other hand, a held close relay has its contacts closed when there is no current and opens when a current is applied.

3. What are some common uses for a normally open relay control system?

Normally open relay control systems are commonly used in applications where the circuit needs to be completed when a certain condition is met. This can include turning on lights or activating alarms based on the presence of a person or object.

4. How does a held close relay control system work?

A held close relay control system uses a latching mechanism to keep the contacts closed even after the initial current is removed. This allows the circuit to remain closed until another signal is received to open the contacts.

5. What are the advantages of using a relay control system?

Some advantages of using a relay control system include its ability to isolate the control circuit from the high voltage circuit, its reliability, and its ability to switch high currents without the need for large switches. Additionally, it is a cost-effective solution for controlling multiple circuits using a single control signal.

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