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Syndication

In this week's episode, Helge Hornis talks to David Fink, National Account Manager at Pepperl+Fuchs, about how to use AS-Interface to monitor valve position. David first gives an overview of the basic components of a valve assembly. This includes quarter-turn valves mounted to a pneumatic actuator. The actuator is equipped with a dual-position inductive sensor a target or puck, and a solenoid valve:

  • --How does the whole valve assembly work together?
  • --Do you need to pay attention to where the puck is mounted?
  • --How is AS-Interface used to control the position of industrial valves?

Read the blog post: Using AS-Interface to Control Pneumatically Operated Process Valve Assemblies

Direct download: techtalk107.mp3
Category:AS-Interface Technology -- posted at: 5:00 PM

During last week's episode, Tim talked about the basic AS-Interface safety monitor. There is a second hardware version that can operate a small AS-Interface network without the need for a dedicated AS-Interface power supply. Today, Tim covers the important points of the VAS/M-2A8L-KE4-8SE-C1 safety monitor.

Products noted in this episode:

VAS-2A8L-KE4-8SE safety monitor

VAZ-1E4A-KE4-Z/R-S contact expansion module

VAZ-2E8A-KE4-Z/R-S contact expansion module

Direct download: techtalk106.mp3
Category:AS-Interface Technology -- posted at: 5:00 PM

In this episode, Tim and Helge discuss the scenario where engineers are looking for small, flexible, and low-cost safety solutions where AS-Interface Safety at Work may not make sense for their application.

The AS-Interface safety controller VAS-2A8L-KE4-8SE is a low-cost, high flexibility device. The safety controller offers 4 safe inputs and 2 safe outputs and is able to expand if the application requires it.

Other products mentioned in this episode:

Download the Configuration software VAZ-SW-SIMON+

Emergency stop button VAZ-2E1A-F85A-S

Direct download: techtalk105.mp3
Category:AS-Interface Technology -- posted at: 5:00 PM

Most modern installations use AS-Interface gateways that are Ethernet based.  More specifically this means PROFINET and EtherNet/IP.  These gateways are also available with an integrated safety controller.  Tim and Helge discuss why this integration of the gateway with safety functionality is advantageous.
 
As far as AS-Interface power supplies are concerned, most installations utilize 4 A or 8 A power supplies.  While decoupling can be located in an external device or in the gateway, it is still most common to have the decoupling circuit inside the power supply.

Direct download: techtalk104.mp3
Category:AS-Interface Technology -- posted at: 5:00 PM

Every AS-Interface system needs three basic components: gateways, power supplies, and modules. Add some infrastructure like cable, and you have what it takes. When it comes to AS-Interface modules, 4-input modules and 4-input / 4-output modules are used the most.

 
Some users even go a step further and design everything using 4-input / 4-output modules. Flexibility in the field and reduced stocking are major advantages. Factory automation uses the AS-Interface flat cable while process automation almost always uses round cable.

Direct download: techtalk103.mp3
Category:AS-Interface Technology -- posted at: 5:00 PM

Virtually every machine uses e-stops to bring them to a safe, no-power state. With AS-Interface, the most common e-stop is designed so that all the necessary electronics are part of the e-stop.

But there is another approach: combining a more conventional dumb e-stop with a very small AS-Interface G10 safety module. Safety door switches are also very common. To allow the highest degree of flexibility, the keys that go along with these safety devices come in many designs depending on the kind and size of door.

Direct download: techtalk102.mp3
Category:AS-Interface Technology -- posted at: 5:00 PM

Safe, contact-expansion relay modules for AS-Interface are used to expand the number of available safety outputs in cases where modern electronic safe outputs cannot be used.  Because they have no mechanical components that are more prone to fail, this approach has numerous advantageous for AS-Interface networks:

  • --Not using relays reduces the cost of the solution
  • --The switch-off time of an electronic output is faster
  • --Eliminating mechanical components increases total system reliability
  • --External relays reduce the cost of replacing a failed component
  • --Replacing just the contact expansion module is faster
Direct download: techtalk101.mp3
Category:AS-Interface Technology -- posted at: 1:32 PM

This episode discusses more “slightly unusual” application-solver devices that make AS-Interface great.

The AS-Interface Movimot module is a great solution when AS-Interface is used to control the SEW MOVIMOT Gearmotor with integrated frequency inverter.

The Pepperl+Fuchs PTC protected passive splitter is used to protect the cable in case there is a short on the pigtail.

Direct download: techtalk100.mp3
Category:AS-Interface Technology -- posted at: 2:35 AM

The AS-Interface 'Circuit Board' module is a great solution when profile height matters.  Using an AS-Interface circuit board module and pre-mounting it in a small housing with six 22 mm holes is another good solution for user input/feedback.

  • --The circuit board module is fully encapsulated and quickly mounted using hook & loop
  • --The modules are designed for pushbutton inputs, selector switches and LEDs that can be completely powered from AS-Interface
  • --The "flying lead" version further simplifies installation
  • --The LT3 module can be expanded to 8-in and 8-out by adding a second circuit board module
Direct download: techtalk99.mp3
Category:AS-Interface Technology -- posted at: 5:00 PM

Most AS-Interface installations use 4-input or 4-input/4-output modules.  But there are many other AS-Interface devices, used less frequently, that are still very useful to know about. This episode covers some of those “application solvers.”

  • --Incandescent stack light elements are suitable when cost is top priority
  • --Light elements come in all standard colors
  • --The 'BUZZER' device is used to provide user information and allows feedback
  • --The 'BUZZER' offers illumination, a horn, and a capacitive touch button for user acknowledgment

 

 

Direct download: techtalk98.mp3
Category:AS-Interface Technology -- posted at: 1:16 PM