Johnson Controls FX-PCX3721-0 SKU: FX-PCX3721-0 $1,017.59 $2,035.18 Quantity -+ In Stock Details Johnson Controls FX-PCX3721-0 : 16-Point Expansion I/O Module with 16 BI, FC, and SA Bus Support (Approval Required for Purchase) Data Sheet Installation Instructions DetailsData SheetInstallation Instructions Back Johnson Controls FX-PCX3721-0 : 16-Point Expansion I/O Module with 16 BI, FC, and SA Bus Support (Approval Required for Purchase) Back Back