The Weidmüller relay is combined with multiple high-quality sealed small relays with lower coil voltage

Weidmüller relay relay coil is represented by a rectangular box symbol in the circuit. If the relay has two coils, draw two parallel rectangular boxes.At the same time, mark the text symbol “J” of the relay in or beside the long box.There are two ways to represent the contacts of the relay: one is to draw them directly on the side of the long box, which is more intuitive.The other is to draw each contact into its own control circuit according to the needs of circuit connection. Usually the same text symbols are marked next to the contacts and coils of the same relay, and the contact groups are numbered. To show the difference.There are three basic forms of relay contacts: moving-on (normally open) (H-type) coils are disconnected when the coil is not energized, and the two contacts are closed when energized..Indicated by the pinyin prefix “H” of the ligature.The two contacts of the movable-break (normally closed) (D type) coil are closed when the coil is not energized, and the two contacts are disconnected after energization..Use hyphenated pinyin prefix “D” to indicate.Conversion type (Z type) This is the contact group type.There are three contacts in this contact group, namely the middle is a moving contact, and the upper and lower are static contacts..When the coil is not energized, the movable contact and one of the static contacts are disconnected and the other is closed. After the coil is energized, the movable contact moves to make the original open to be closed, and the original closed to the open state to reach the converted state. purpose.Such a contact group is called a changeover contact.Use the pinyin prefix “z” of the word “zhuan” to indicate.A reed relay is a relay that generates a magnetic field from a coil to actuate the reed tube. It is a coil sensing device..Therefore, the characteristics of reed relays, small size, light weight, fast response speed, short bounce time and other characteristics.When a whole piece of ferromagnetic metal or other magnetically conductive material approaches it, it will act to open or close the circuit.Composed of permanent magnet and reed pipe.Permanent magnets and reed pipes are fixed on a non-magnetic and non-magnetic support.Take the line connecting the north and south poles of the permanent magnet as the axis, and this axis should coincide or basically coincide with the axis of the reed switch.Adjust the distance between the permanent magnet and the reed pipe from far to near, when the reed pipe just happens to move (for a normally open reed pipe, it becomes closed; for a normally closed reed pipe, it becomes open) , Fix the position of the magnet.At this time, when a whole piece of magnetically conductive material, such as an iron plate, is close to the magnet and the reed switch at the same time, the reed switch will act again and return to the state when there is no magnetic field; when the iron plate is removed, the reed switch Action in the opposite direction.The reed relay has a sturdy structure, sealed contacts and high durability. It can be used as a position limit switch for mechanical equipment, and it can also be used to detect whether iron doors, windows, etc. are in designated positions..