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  • Connect one end of the flat cable to the loopback board
  • Connect the loopback board to the OP4200 DB37 output cassette
  • Connect the other end (DB37 connector) of the flat cable to the OP4200 DB37 input cassette
  • When this kit is used to test digital signals, connect the Vuser (required to preserve isolation) * using the cable provided in the starter kit (P/N 113-0927)  from the loopback board (connector end) to an external source (wire end).

* For more information about the use of Vuser and Vrtn pleaser refer to this article in the OPAL-RT knowledge base : How to power the different DB37 boards for digital outputs.