24 Volt ASi
AS-Interface is a globally standardized fieldbus system (EN 50295 and IEC 62026-2). It is a system that links sensors and actuators to a controller over a common data transmission path.
Data and power through a single cable
The abbreviation ASi stands for Actuator-Sensor Interface. This interface connects the modules in the lowest process level in automation systems with each other. The usual cable trees are replaced here by a single electrical cable – the ASi cable. This cable carries both data and power.
The four ASi components
Leading manufacturers around the world support this simple wiring system. It consists of four components: the master , the slaves , a power supply and the yellow ASi cable . Each slave has a unique address assigned to it which the master used to exchange in- and output data.Power for ASi
ASi modules are generally powered by an additional power supply having a rating of 30 volts.Small systems can eliminate the power supply
Bihl+Wiedemann now offers masters which can be connected to already present standard 24 V power supplies, without the need for an additional ASi power supply. This is an ideal solution for small machines having three to 15 slaves and a maximum cable length of 50 meters.
24 Volt ASi overview
- Ideal for small and very small applications (around 3-15 slaves)
- No additional ASi power supply needed
- Can be powered directly by the 24 V already present in the control cabinet
- Maximum 4 A available for ASi
- Up to 50 m ASi cable length
- Interfaces with all common fieldbus systems
