As interface - design, Definition, Hapter – Burkert Type 8681 User Manual
Page 38: Definition 11.1

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AS Interface - Design
11.
as inTerfaCe - design
definition
11.1.
aS interface Connection
AS interface (Actuator Sensor Interface) is a field bus system which is used primarily for networking binary sensors
and actuators (slaves) with a higher-level control (master).
Connecting the control heads to higher bus systems is possible using commercially available gateways.
Contact your distribution partner in this regard.
Bus line
Unshielded two-wire line (AS interface line as AS interface cable harness) along which both information (data) and
energy (power supply for the actuators and sensors) are transmitted.
network topology
Freely selectable within wide limits, i.e. star, tree and line networks are possible. Further details are described in the
AS Interface Specification (A/B slave model conforms to the version 3.0 specification).
technical Data of the aS interface of the Control Head:
See chapter
The control heads have been configured as AS interface version with an extended address range (A/B slaves)
for 62 slaves or optionally as an AS interface version for 31 slaves. For details, see chapter
english
Control Head Type 8681