AS-interface Network Components

The AS-Interface master automatically controls all communication over the AS-Interface cable without the need for special software. The master can connect the system to a PLC, act as a standalone controller or serve as a gateway to higher-level bus systems.

The trapezoidal AS-Interface cable is recommended over standard two-wire round cable for quick and simple connection of slaves. The AS-Interface cable is available in different colors to signify its voltage rating with color assignments as follows:

• Yellow - AS-Interface cable for data and control power between the master and its slaves
• Black - External output power cable up to 60 VDC
• Red - External output power cable up to 240 VAC

The standard coupling module, which is the lower section of a standard device, connects the user module to the yellow AS-Interface cable. The user module connects the sensors and actuators, while the application modules connect via screw terminals or connectors. Sensors and actuators with a built-in ASI chip can be directly connected to the ASI cable.

Data and control power are normally transmitted simultaneously via the AS-Interface cable. Power for the electronics and inputs is supplied by a special AS-Interface power supply that feeds a symmetrical supply voltage of 30 VDC into the AS-Interface cable via a data decoupling device. Power supplies from 2.2 A to 8 A are available.