Drop-in replacement design enables quick and easy installation in existing electrical boxes
Redesigned board layout maintains full functionality and footprint as original
Consistent output and sensor jack ordering simplifies wiring and troubleshooting
Supports both new and legacy Passport IO series for broad compatibility
Top-mounted display and other jacks for improved accessibility
Summarized by Shop
400-IO - Drop in replacement control board for Dometic™ Marine Air™ Passport IO™ A redesigned, newly manufactured, replacement control board. Drop-in compatible with existing electrical boxes.
Guides & Information
EasyStart Wiring Diagram
Before You Buy This board replaces Marine Air and Dometic Passport IO series power supplie
Compatible Models
Dometic Passport IO A, Marine Air Passport IO series (VTD, VCD, CSD, SVCD, CMCD, SCMCD, AH Passport IO)