The Isonas RC-03 has been discontinued and is no longer available. You can use the Isonas RC-04 Reader-Controller as a direct replacement for the RC-03. There is a cable adapter for the RC-04 that allows you to use the RC-03 wiring harness with the RC-04, so that you do not have to pull the RC-03 harness out of the wall and replace it with an RC-04 harness. The part number for this adapter is ‘CABLE-Adapter’. This will require a bit of rewiring at the lock as the wiring needs to follow RC-04 diagrams; for example, the RC-03 connected to a failsecure strike would be wired with the tan and black wires but when using an RC-04 with the CABLE-adapter you would use the red and black wires. The RC-04 wiring directory is located here:
Click here for the wiring diagram
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