AS-Interface buses are field buses (level 0) and can be used to connect sensors/actuators. They allow Discrete and Analog information to be routed between a bus master and sensor/actuator slaves.
The three basic components of an AS-Interface bus are:
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A bus master
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A dedicated power supply providing 30 VDC
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Slaves (sensors, actuators, etc.)
Main Types of Sensors/ Actuators
There are 2 main types of sensors and actuators
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Communication sensors and actuators
With a built-in AS-Interface function they link up directly to the AS-Interface bus or through a Tap Off connector.
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Conventional and IP65 sensors and actuators
They connect to the bus through an AS-Interface I/O modules (IP20 and IP67 Advantys Interfaces). These interfaces are used to connect conventional sensors and actuators to the AS-Interface bus and provide them with the capacity for dialog on the bus.
You can connect to a AS-Interface bus:
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Standard slaves (with addresses 1 to 31)
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Extended slaves (with addresses 1A to 31A and 1B to 31B)
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Slaves that support Combined Transaction Type profiles.
The following table gives the types of slaves and the maximum number of I/O connections for each type on an AS-Interface Bus:
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Type of Slave
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Maximum Number of I/Os
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Maximum Number of Slaves
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Standard Address
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248 I/Os (124 Inputs and 124 Outputs)
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31
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Extended Address
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Maximum of 992 I/Os (496 inputs and 496 outputs) on 62 slaves
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62, they are paired on the 31 standard addresses in 2 banks A and B)
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NOTE: The standard and extended slaves can be mixed on the same AS-Interface bus. Standard slaves can only be configured on bank A. If a standard slave occupies an address on bank A, an extended slave cannot be configured at the same address on bank B.
The following is a list of AS-Interface products available from Schneider-Electric:
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Field devices
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Advantys Interfaces for Discrete I/O (IP20)
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Advantys Interfaces for Analog Inputs (IP20)
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Advantys Interfaces for IP67 I/O (4 or 8 channels)
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TeSys U starter controllers
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D.O.L. starters
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LA• series of starters
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Dedicated components
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Safety solutions
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Infrastructure
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AS-Interface cables
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Tap Offs (IP67)
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Line extension and Repeater
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Insulation control relay for AS-Interface line
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Ethernet-, CANopen- and Profibus-AS-Interface gateways
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Tools
Information about these products can be found in the AS-Interface Catalog at the Schneider-Electric WEB site.
