The AS-Interface Expert Alliance is the home of AS-Interface in the UK.

yellow cableWe are a pro-active group of companies, organisations and individuals who have combined resources to support and promote the use of this technology in the UK. Members of the AS-Interface Expert Alliance work independently and together to provide a unique resource for all levels of user. Our membership includes large international manufacturers with UK sales operations, United Kingdom based manufacturers, systems integrators, small niche companies and universities.

The Technology

AS-Interface (AS-i) is the simplest of the industrial networking protocols used in PLC, DCS and PC-based automation systems. It's designed for connecting binary (ON/OFF) devices such as actuators and sensors in discrete manufacturing and process applications using a single cable. It is an 'open' technology supported by 100s of automation vendors. Well over 20 Million AS-i field devices are installed and proven globally.

AS-Interface is a highly efficient networking alternative to the hard wiring of field devices. It is an excellent partner for fieldbus networks such as PROFIBUS, DeviceNet, Interbus and Industrial Ethernet, for whom it offers a low-cost remote I/O solution. It is proven in hundreds of thousands of applications, including conveyors, process control valves, bottling plants, electrical distribution systems, airport carousels, elevators, bottling lines and food production lines. AS-i is even available in a cut-down version known as AS-i SW for ultra-simple devices such as panel switches and indicators.

Functional Safety too! AS-i provides the ideal basis for Functional Safety in machinery safety/emergency stop applications. A special profile called Safety at Work (sometimes called ASi-Safe) is used. Safety devices are connected on the same cable as the control system and can provide Safety support up to SIL (Safety Integrity Level) 3 according to IEC 61508. Several members of the UK Expert Alliance specialise in machine safety and can help implement solutions, including risk assessments and reductions, validation and installation. The UK Expert Alliance promotes 'competence' as the most critical qualification of all personnel involved in Safety

Tech Forum Activity

24 June 2010 11:37 am
ASI Power24?
I am wondering why there hasn’t been any news about this, other than some devices now becoming available supporting it. See: Is this a …

31 December 2009 7:48 pm
ASI safety system fails EMI susceptibility tests.
We are currently performing EMC susceptibility tests on our machine, which is equipped with an ASI safety at work safety system. The system trips when …

17 May 2010 3:06 pm
AS-i Power Fail
We have a conveyor system with a Siemens S7-317 2DP with 3 DP/AS-i Link gateways (6ES7194-5AA00-0XA0). At one of the gateways we are getting the …

17 May 2010 3:01 pm
Performance Levels
With the new standard 13849 kicking in to replace 954, everything is about achieving required Performance Levels. I am using the free Sistema software, and …
By:PYF Paul

17 May 2010 3:04 pm
Has anyone done the sums?
I get the feeling that an IO subsystem based on ASI would be considerable cheaper than alternative bus systems I could mention.  Typically systems have …