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TAC Xenta 200, 300 or 401 Controller fails while using RJ11 OP port

TAC Xenta 200, 300 or 401 Controller fails while using RJ11 OP port

Issue

When using the RJ10 OP port for Lonworks communication the TAC Xenta 200, 300, or 401 controllers fails completely. 

Product Line

TAC Vista

Environment

  • Xenta 281
  • Xenta 301
  • Xenta 401
  • Xenta OP
  • Vista server

Cause

When theRJ10 OP port on a TAC Xenta 200,300 or 401 controller is used to access the Lonworks network the controller can be easily damaged if the 24VAC power is shorted or grounded accidently.  The OP port on these controllers have four pins. Two of them are the Lonworks network and the other two are 24VAC to power the OP panel, If the two 24VAC wires (most left pins on the TAC Xenta 280, 300 and 401) are shorted the embedded fuse in the controller may be blown and the controller will not be able to be used.

Resolution

In most cases the controllers internal fuse has blown and will require replacement. The repair of this will be dependent on location and type of controller.  Please contact the repairs department if repair is possible.  
Recommendation: If this type of connection is to used, then ensure that the two 24VAC wires are very well separated from each other.

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