AS-Interface is an open, vendor-independent bus system.
Actuators and sensors are connected to the controller via an unshielded 2-wire line – which simultaneously transfers data and power.
The basis of each system include:-
Power supply unit
Various standard and safe slaves
The actuator sensor interface offers the following benefits: ● No need for complex cable harnesses to the sensors and actuators ● Smaller control cabinets due to the lack of I/O modules ● Rapid installation ● Plug-in methods allows sensors and actuators to be connected without errors ● Signals are mapped in the PLC in the same way as for standard I/O modules ● Comprehensive range of diagnosis options covering even individual modules ● Modules can be replaced while the system is live BENEFITS Introduction Benefits
Assignment of the I/O data bits for an AS-i Slave
Signal + power Auxiliary cable Power only 24V/30V
Unique shape ensures proper wiring in the modules
Cable designed to withstand harsh industry atmosphere
Signal send by modulating with power signal ,
hence EMI will affect less
ASI interface cable details Components
Properties of the AS-Interface cable ● The AS-Interface cable connects all the network nodes. ● The cable has two wires (ASI + and ASI -) and is unshielded. ● The trapezoidal profile with the profiled lug ensures a high degree of protection against polarity reversal (mechanical code). ● The shaped cable transfers data and power. Components
Masters for SIMATIC S7 Breakdown Service Masters for SIMATIC S7 300 The CP 343-2/ P is the AS-i master module) for the S7-300 and for the ET 200M distributed I/O device Status LEDs on the front panel of the communications processor (CP) indicate the status of the AS-i master and the operational readiness of the slaves. The CP 343-2/ P can be used in AS-i Power24V networks. The AS-i master controls data exchange with the connected nodes by means of cyclic polling. During a cycle, four data bits are exchanged with each slave in both the input and output direction. Components
CP 243-2 Spares The CP 243-2 is the master connection of the S7-200 to AS-Interface. This enhances flexibility and expands the application options of the S7-200 by increasing the number of digital inputs/outputs appreciably. Masters for SIMATIC S7 200
LED COLOR NAME CM YELLOW Configuration Mode AUP GREEN AutoProgram mode available CER YELLOW Configuration Error APF RED Asi Power failure PWR GREEN Power SF RED System Fault
Up to 62 AS-Interface slaves can be connected (A/B technology No commissioning required. Optional: Upload of AS-Interface configuration in STEP 7 for S7-300 master Easy operation in the input/output address area of the SIMATIC controller Monitoring of the supply voltage on the AS-Interface shaped cable Advantages at a glance Components
Remote unit IE/AS I link AMC In addition to the direct connection, the AS-Interface can also be used on a distributed basis as feeders for higher-level bus systems.. The module has got profibus interface and act as profibus slave and also as asi master module Components
DP/AS-i LINK Advanced AMC The DP/AS-i LINKs Advanced are a PROFIBUS DPV1-slave and AS-i master This allows data to be transparently accessed on AS-Interface from PROFIBUS DP. It is either available as single or double master Ideally suited for distributed architectures and to connect an AS-Interface network to higher-level bus systems. Components
The DP/AS-i Link 20E connects PROFIBUS DP to AS-Interface.
The DP/AS-i Link 20E is both a PROFIBUS DP slave und AS-Interface master.
An additional power supply is not required as the power is taken from the AS-Interface cable.
Commissioning times are also reduced as engineering is as simple as pressing a button.
The DP/AS-i Link 20E permits configuring of the AS-Interface network in STEP7 (from V5.2) requiring no additional software.
DP/AS-Interface Link 20E Components
Slave modules Slave Modules Siemens slave modules Have high degree of IP protection
Slave module Training Up to 62 standard slaves or 31 safe slaves can be connected to one AS-i network. The bandwidth of our AS-i Slaves ranges from simple I/O modules up to motor starters and frequency converters . Slave modules may be active or passive type Addressing may be A/B type or standard type Zero is default address Slave Modules
Slave module Replacement/Repair Compact Modules K60 in IP65/67 The K60 compact modules are available in degree of protection IP 65/67/68 and IP69K. Modules with 8 inputs or 4 outputs are available (depending on the design, the sensors are supplied with power either from the yellow AS-i cable or the black U aux cable). Slave Modules
The power supply units generate a regulated DC voltage of 24 V or 30 V They are an integral component of the AS-Interface network and allow data and power to be transferred simultaneously on one cable in connection with data decoupling. Slave module Slave Modules