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  • Pmac driven I/O Sub-System
  • Numerous I/O modules available
  • Industrial Grade Hardware
  • High Speed I/O
  • Lowest Cost Per Point
  • 5, 8 & 10 Slot Racks available
  • 4, 8 & 16 Point I/O modules
  • Versatile & Modular Rack Style
     Offers Maximum Flexibility
  • Compact: Significant Space Reduction
  • Supports PMAC1, PMAC2, Mini-PMAC
  • Quick Disconnect Modules
  • Industry Standard Interface Voltages
  • Easy-to-Use Windows drag & drop software outputs PMAC code.
 
  
  As a systems integrator, we here at Baker have been using Delta Tau's PMAC line of controllers for years.  And although the card is one of the best in the world, there is always room for improvement.  One such area in need is it's I/O capabilities.  We wanted a solution that was as simple, and flexible, as a PLC rack but without a separate CPU running ladder logic.  We also wanted I/O that would integrate tightly with PMAC.


   What we came up with is the V-RACK I/O system.  We designed a versatile rack I/O interface card that resides in the PC bus (ISA only) with the Delta Tau motion controller.  It adds powerful, compact and fully industrial I/O to your motion control system.  This integrated design allows you to consolidate both your motion and I/O right in the PMAC.  The VRACK I/O system uses industrial grade components and provides a modular, rack-style architecture with maximum flexibility at the lowest cost. Choose from a variety of PLC modules: 8 or 16 point digital and analog input or output. 
See the complete list of available modules.


  The Rack has a PAMUX Bridge CPU in it.  This is cabled (via a 50-pin ribbon cable) to Baker's I/O interface card.  The interface card has two ports on it.  One goes to PMAC's J3 connector and the other goes to PMAC's J5 connector.  A PLCC program in the PMAC scans the Rack to update all the digital I/O.  The analog modules are updated through a PLC program in PMAC.  Seeing a Diagram helps a lot!


  Programming the system is just as easy as plugging it in.  Baker provides a windows based software program that lets you literally drag and drop modules into a picture of the rack you select.  You then click in the modules and assign a TagName to each I/O point.  Click on the translate button and you instantly have PMAC code ready to download or let our program download it for you.  The PMAC code is clear and easy to read with all the tagnames right there as #DEFINE statements which you can always modify as you wish.  Take a tour of the software Utility!


  The update rate of the Rack is based on the scan time of the PLCC in the PMAC.  This is obviously influenced by many factors.  PMAC CPU speed, Number of Axes servoing, number and length of background tasks, number of I/O modules and number of Racks.  This I/O is typically used for push buttons, sensors, and actuators.  PMAC has high speed I/O on board for things like limits and capturing positions.  The Rack is not meant to replace that.
  The analog I/O does run in a non-compiled PLC and is therefore slower than the digital I/O.  It is typically used for speed references to non-servo axes, set points for tension controllers and thermocouple inputs.  It is not intended to be used to commutate, PMAC already does that.
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