How to wire a DCM in parallel for testing When upgrading your PlantStar system to 4.0 it's helpful to wire a test DCM in parallel to test and compare the two systems. Here is how to set that up. Parallel DCM Connection PDF
![syscon-plantstar-1.png]](https://kb.syscon-intl.com/hs-fs/hubfs/syscon-plantstar-1.png?height=40&name=syscon-plantstar-1.png){kind=small}