AS-i Safety

Safety AS-i bus system (Safety Category 4)

AS-i Safety – safety based on the “yellow cable”

AS-i Safety, the safety-oriented extension of AS-Interface, facilitates the standard operation of standard and safety sensor technology in a joint bus connection that has all the well-known system advantages of AS-Interface. Since the year 2000 AS-i Safety has been certified as a reliable bus system for applications up to Category 4 (EN 954-1) by the TÜV-Nord of the Berufsgenossenschaftliches Institut für Arbeitssicherheit.

The Leuze lumiflex type 4 Safety Light Curtains and Multiple Light Beam Safety Devices COMPACT/A and ROBUST/A come with an integrated interface for direct bus connection. The ASM1 category 4 safety monitor supervises the secure transmission of data, and will bring about the safe switching off of the drive circuits when the sensors are triggered or in case a fault occurs.

The ASM 1 safety monitor is obtainable either with one or with two independently working output circuits. For the protection of different safety zones of a plant, several safety monitors can also be connected to an AS-i network.

The incorporation of automatic safety door locks and emergency stop push-buttons and sensors is made possible by means of the ASKM safety coupling module. The device is just as easy to operate as to install. The Windows configuration software makes it possible to allocate sensors to various release circuits by simply dragging and dropping them with the mouse.

System functions such as system start, relay monitoring, uncontrolled stop (Stop 0), controlled stop (Stop 1), sensor start-up test or sensor on-the-spot acknowledgement can likewise be configured by means of the operating software.

Advantages

• Safety Category 4 as defined by EN 954-1
  
  
• Integration of the binary safety-oriented sensors
  
  
• Compatible operation with standard AS-i components
  
  
• Use of Standard AS-i Master and Standard AS-i protocols
  
  
• Group formation of safety-oriented signals through incorporation in the system of several AS-i safety monitors
  
  
• System configuration of the safety components on the basis of “asimon” configuration and diagnosis software
  
  
• Possibility of diagnosis either at the PC or by way of AS-i Master/SPS
  
  
• Bus cycle time of 5 microseconds max.
  
  
• System response time of 40 microseconds max.
  
  
• System range of 100 m lead length (max.) between AS-i sensor and AS-i Master, can be extended to 300 m (max.) lead length using 2 AS-i repeaters
  
  
• Incorporation of a maximum of 31 AS-i safety sensors
  
  
• Compatibility with all AS-i components made by the various manufacturing companies
  
  
• Exchange of secure sensor technology and AS-i safety monitor including configuration data possible without a PC