AS-Interface – Building Automation
The advantages of AS-Interface – such as simple, cost-saving installation and high degree of flexibility – have now become familiar in building automation as well. Numerous companies are relying on the ASi installation system for applications such as controlling fire and smoke damper systems, shutter drives or heating and cooling ceilings using analog output modules. Damper actuators with flow regulators can also be connected to the controller through the MP-Bus Gateway. It is also possible to process EnOcean signals from wireless buttons and sensors through ASi. Customer proximity is our hallmark, which means we stand by you in word and deed and are open to custom-tailored solutions. Just contact us.
ASi is an internationally standardized industrial wiring system (EN 50295, IEC 62026-2) with over 32 million active modules installed and over 1800 certified products. The user organization, which embraces 350 member companies, ensures full compatibility of all products.
AS-Interface is an industrial networking solution for automation systems. It is designed for connecting simple field I/O devices such as binary ON/OFF, analog and safety I/O devices according to EN 50295, IEC 62023-2. Using only a two conductor profile or round cable (ASi cable, 2 x 1.5 mm2, 16 AWG) to connect all slaves to the master using a free topology. This is the main advantage of this system compared to conventional, parallel wiring, where every single signal has to be wired directly to the control system. Data and power are available in the same ASi cable. Every slave or module has its own address for accessing its data. The slaves can be addressed from 1 to 31 (single slaves), or, with extended addressing, there are 62 slaves available (1A to 31A and 1B to 31B). Single slaves and modules with extended addressing (AB modules) can share the same network.
ASi supports free topology such as Tree-, Ring, Linear, Star and Mesh network.
AS-Interface drastically reduces wiring and installation cost and makes expansion or retrofitting very simple.
High availability and safety in accordance with SIL – problem free
AS-Interface also enables safety-relevant systems (EN ISO 13849) to be equipped with interference protection. High-availability or redundant systems (even with circuit integrity) and systems with special safety requirements, such as SIL1, SIL2 or SIL3, all fall under the application spectrum of ASi. The cabling route and communication with all participants are constantly monitored, even in the standard version. This ensures that all dampers can be still controlled in the event of a fire.
Installation – very simple
- AS-Interface provides a clever connection technology over a profiled cable. Lay the cable, screw on tightly, ready. Contact pins always penetrate vertically into the profile cable to guarantee optimal contacting
- Optimal contacting provided by:
- Vertical contacting
- 4 or 6 pins per cable and 2 or 3 pins per conductor
ASi Features per Line
Unshielded two conductor profile cable
Power Supply and data in one cable with max. 8 A
100 m (extensible up to 1000 m)
Number of Slaves per ASi Network
Up to 248 Inputs and 248 Outputs
Up to 124 Inputs or Outputs
Tree, star, linear, linear with taps and mesh
up to SIL 3, Category 4, PLe (EN 62061, EN 61508, EN ISO 13849-1, EN 954-1)
Connection to any Building Management System
Safety in case of fire
Control module on the fire damper / smoke extraction damper
Pre-wired and configured stand alone control for fire dampers
Gateways for linking to any Building Management System
Option: can be used with integrated controller (mini-PLC) or as stand-alone device
- Permanent cable route monitoring
- Plain text messages on the display and to the BMS
- Also available as pre-configured
Module for controlling damper actuators
- For ventilation, fire and smoke dampers
- Inputs for end position detection
- Output for controlling dampers
- Additional input e.g. for fire alarms Additional input e.g. for fire alarms
- Supply of the drives from ASi or external 24 V
Relay module to control motor driven 230 V damper actuators
- Inputs for end position detection
- 2 or 4 relay outputs
- 1 AB slave (up to 62 slaves)
- Connection of 2 or 4 fire dampers per module possible
- Power supply of the motors via external 24 V/230V
Module for detecting the end positions of thermal fire dampers
- 4I module
- AB slave (up to 62 slaves)
- Supply of inputs via ASi
- Housing with external fastening tabs
Control Cabinet Modules
- Digital 4I/4O
- Digital 8I
- Digital 8O
- Relay outputs (230 V AC)
- 4I/4O, 8I/8O
- 0/4...20m A
- 0...10 V
- Optional with integrated bus termination
- Also available in IP65
- Single Phase
- 3 Phases
- 24 V to ASi
- 1,8 A, 2 A, 4 A, 8 A
- Decoupling unit for 2 ASi networks
Profile and Round Cable
It is possible to use a specific cable for various applications. For instance, the profile cable with polarity reversal protection is suitable for fire dampers. It is halogen-free and available in 1.5 mm2 or 2.5 mm2. However, it may also be possible to use a pre-laid round cable, such as NYM 2 × 1.5 mm2 or NYM 2 × 2.5 mm2. In terms of smoke extraction, cables with circuit integrity (e.g. E90) are often necessary.
The connection to fire protection or smoke extraction dampers is usually pre-wired and ready to plug in to the AMP plugs of the drives. If the drives come with connecting wires, it is also possible to terminate the cables with push-in spring-type terminals.
Simple – with maximum flexibility.
Commissioning / Diagnostic / Software / Test Run
The ASi masters can transfer all data to a higher level control or process them locally depending on the application and their requirements. In terms of local processing, they offer maximum flexibility, and they are freely programmable or provided complete with a pre-installed program for many application scenarios: connect - ready. Of course, all state information and diagnostic messages from the building control system are always available. An integrated web server enables remote diagnostics even from computers without diagnostics software.
The comprehensive package is rounded off by comfortable tools for commissioning, diagnostics and test runs.