Binding post

A binding post is usually a screw or clamping by spring force connection for connection of cables to individual contacts electrical equipment or assemblies. They allow depending on the version with or without tools removable electrically conductive connection. A jammed, plug-in connection consists of a single plug with matched counterpart to the connector receptacle.

Electrical engineering in general

The terminals of electric motors and generators are commonly referred to as binding posts.

Motor vehicle electrical

In automotive electrics especially the threaded terminal connections for the connections to the starter battery are called terminal posts. They ensure a mechanically secure connection and leave by their large contact area for high currents that occur when operating the starter. The pincers on the jumper wire for the jumper or chargers are called terminal posts.

Laboratory Equipment

In the laboratory technique, the electrical connections of laboratory equipment such as voltage sources and measuring instruments are called terminal type. De facto standard for such terminals is the socket for the 4-mm -clip ( " Banana ").

Electric welding

When electric welding is, the permanently connected with the workpiece during welding earth clamp of the welding machine terminal type.

Lautsprecherpolklemme

In a public address system is meant by terminal clamp recording ( the connection terminal) for the speaker wire to a speaker or to the signal issuing source, the full or amplifier. Pairwise binding posts are always inserted into the speaker cabinet, in order to connect each of the plus and minus wire of the speaker cable can. As a material for the production of brass or copper is often used. Terminals are designed in the best case that they can accommodate both cable lugs, banana plugs or stripped wire strands of speaker cable firmly and securely from short circuit.

Many higher-quality speakers even have 2 or 3 Polklemmenpaare in the housing. The reason for this lies in the design of each speaker (for example, 2-way, 3-way ). The number of Polklemmenpaare is determined in accordance with the structure and define the crossover frequency ranges that drive the individual speaker sections (eg, bass, middle, treble in a 3 -way system ).

This gives the possibility for separate control of each speaker drivers for each frequency band for the purpose of sound improvement. The speaker can be so in the bi-amping or tri -amping operate or may be connected with respectively wired speaker cables in bi-wiring or tri-wiring.

Terminals are almost always provided to allow a polarized connection of the speaker wire with color coded (red = positive, black = negative). No one notices this, it comes to the polarity of the speaker or a Tonzweiges (eg the Tieftonzweiges ), which almost always results in reduced sound quality. The chassis of a range of frequencies, for example, in a stereo speaker system then work with a phase shift of 180 degrees to each other, which can lead to an extinction of these frequencies in the worst case.