CN: Connector. On the contactor, 0n represents the normally open contact and cn represents the normally closed contact.
As long as a certain voltage is added to both ends of the coil, a certain current will flow through the coil, resulting in an electromagnetic effect, and the armature will overcome the pull of the return spring under the action of electromagnetic force attraction to attract the iron core, thereby driving the moving contact of the armature and the static contact (normally open contact).
When the coil is powered off, the electromagnetic suction also disappears, and the armature will return to the original position in the spring's reaction force, so that the moving contact and the original static contact (normally closed contact) are released.
This suction, release, so as to achieve the purpose of conduction in the circuit, cut off. For the \"normally open, normally closed\" contact of the relay, it can be distinguished in this way: the static contact in the disconnected state when the relay coil is not powered on is called \"normally open contact\"; The static contact in the connected state is called \"normally closed contact\".
CN is normally closed. This is because CN is the contact of a relay, and the contact should always remain closed when there is no excitation. When the excitation is applied to the relay, the contact switches to the open state. The Normally Closed state of CN is also called NC (Normally Closed), and the normally Open state is called NO (Normally Open). In practical applications, normally closed CN contacts are often used for safety and protection functions in control circuits, such as the inclusion of an emergency stop button in a machine or device to cut off all power in an emergency.
CN (nucleus) is normally closed. Because the nucleus is an important structure within the cell, maintaining the genetic information within the cell, it is usually opened when the cell is ready to divide, so that DNA replication and cell division can take place.
In ordinary cellular life activities, the nucleus is normally closed and strictly controls activities such as DNA repair and replication.
Therefore, the normally closed state of the nucleus is very important to protect the stability of the cell.
1 CN is normally open 2 The reason is that CN refers to the normally open relay, when the control circuit is energized, the relay's electromagnet is magnetized, attracting the spring connected to the above to move, connect the line, and make it start.
3 Compared to normally closed relays, normally open relays remain open when the circuit is powered off, so they are often used to switch control circuits.
CN (Central nervous system) is normally open. Because the central nervous system (including the brain and spinal cord) is responsible for controlling and coordinating various physiological and psychological activities of the human body, it is always in a working state and will not stop working.
The central nervous system transmits information through synaptic connections between neurons that are always active, sometimes even higher than other neurons are excited. At the same time, the central nervous system also controls various physiological activities of the human body through the autonomic nervous system and the endocrine system, such as heartbeat, breathing, digestion, etc., and these processes are also uninterrupted.
Therefore, the central nervous system can be said to be normally open.
& # 34; CN" In English it usually means \"Normally Closed\
CN is normally closed.
Because CN (Shanghai Public Security Bureau Entry and Exit Reception Office) is the Chinese passport, visa and other exit and entry affairs agency, need to ensure safety and order, so the access control is generally carried out in a normally closed way, only after verification and compliance with the regulations can enter.
Hello, this question depends on what device or component you are referring to.
For relays, CN is generally Normally Open (Normally Open) end, also known as NO end, when the relay is powered on, CN and COM (common end) between the formation of a path, the current can pass. When the relay is powered off, the CN terminal is disconnected from the COM, and the current cannot pass through.
For the switch, CN is generally the Normally Closed end, also known as the NC end, when the switch is not pressed, the CN end and NO (normally open) end to form a path, the current can pass through. When the switch is pressed, the CN and NO terminals are disconnected, and current cannot pass through.
In short, CN is the property of specific equipment or components, which needs to be judged according to different situations.
CN can be Normally Open or Normally Closed, depending on how the switch is designed and the application scenario. In a circuit, normally on means that the switch is off when it is not triggered, and only closes when it is triggered, and vice versa. Normally closed means that the switch remains closed when it is not triggered, and only turns on when it is triggered, and vice versa.
normal close
The symbols on the circuit board in the actual application are not very strict standards (I am talking about the actual application), some use English prefix, some use Khan pinyin, but also use some numbers, symbols, etc., there are also mixed. There are some that we are used to and will not misunderstand, such as: GND (ground, generally refers to the signal ground), COM (common end), VCC, VDD, VSS and so on.
For this matter, CN is Normally Open, that is, in the absence of trigger conditions, the circuit is disconnected. When the trigger condition is met, the circuit will close.
If referring to the CN of the relay, normally open and normally closed depend on the type and purpose of the relay. Normally open relays disconnect the circuit when not activated, and close the circuit after activation. Normally closed relays close the circuit when not activated and disconnect the circuit after activation.