AS-Interface offers you the following advantages:
- Simplicity: Easy connection and quick installation are possible
- Effectiveness: Increased reliability is ensured by the intelligent protocol
- Flexibility: Flexible integration is possible both in a direct and decentralised fashion
- Efficiency: Economic gain by reducing the amount of cables
Fundamentals of AS-Interface
Use of AS-Interface at field level
AS-Interface (Actuator-Sensor-Interface) is a global standardised fieldbus system for connecting sensors and actuators to a higher-level controller via a common data transmission medium.
AS-Interface is used at field level and generally serves to transfer process data to a higher control level. For example, field devices can be integrated into existing networks either directly via the so-called ASi master or via a gateway. Specific information and process data are transmitted between the field devices and the controller using a 2-wire yellow AS-Interface profile cable. This special AS-Interface cable is used for both transmitting data and supplying power to the field devices.
Simple configuration of AS-Interface
Master-slave communication model
At field device level, AS-Interface is governed by the master-slave principle. In this case, communication between the ASi master and its slaves (field devices) occurs as a cyclic request. The ASi master manages data traffic, thereby connecting the participants to the higher-level controller. The master thus monitors and controls the entire data exchange within the network. It sends information to the slaves, which then evaluate it (filter out the information intended for them) and send back a response to the master. Slaves can be simple, individual field devices or compact field modules.
Integration options of AS-Interface in automation systems
As standard, AS-Interface is implemented as a sub-fieldbus system in established, high-performance fieldbus systems and Industrial Ethernet for communication purposes. This extends down to the lowest field level.
The network topology
AS-Interface can be used to flexibly select the network topology. As a result, a linear structure is just as suitable as a star or tree structure. ASi protocol thus allows for modular expansion of an industrial communication network, which in turn enables individual adaptation to the topology of existing systems. At the same time, cabling within the network can also be reduced. This level of flexibility leads to a significant reduction of cabling effort within the network.
The AS-Interface flat cable
Data transmission and power supply through a single cable
The yellow AS-Interface flat cable is characterised by the fact that data is transmitted and power supplied to the field devices via the same 2-wire profile cable.
For the additional supply of certain 24V DC field devices or modules, a black profile cable is used, if required.
The maximum cable length per segment is 100 m but it can be extended using repeaters, for example.
The field devices can be connected directly to the AS-Interface cable via a push-in connector. Piercing technology is used to connect the devices. During installation, two piercing needles attached to the cable pierce the insulation of the flat cable, thereby establishing a secure connection to the network. This technology ensures reliable connection and easy installation.
Advantages of the AS-Interface cable
AS-Interface cable technology is valued for its simple, efficient and economical networking. The use of the AS-Interface flat cable for simultaneous power supply and data transmission makes it possible to avoid wiring errors.
In addition, this leads to a reduction in cabling and the associated installation costs.
Your advantages with AS-Interface
Our Bürkert expertise
We have been a reliable industry partner for many years and offer high-quality technology solutions. This also applies to the field of automation technology. An essential component of modern automation concepts is digital communication. As a member of the AS-International Association, we are actively involved in shaping this sector and certify our products and system solutions accordingly.
With the aid of AS-Interface, our products can be integrated into your plant when implementing an automation concept. Moreover, your individual requirements on the network topology can also be taken into account.
To provide you with the best possible support for the automation of your production plants, the communication protocol AS-Interface can be found in many of our applications and products.
Application examples with AS-Interface
Bürkert products with AS-Interface are generally used in process automation for controlling and regulating media (gases, liquids). This includes processing plants for food production and packaging, as well as the beverage industry, dairies and application in the pharmaceutical sector.
Our control heads and positioners with AS-Interface