ABB IEMMU21 Rear-Mount Module Mounting Unit (MMU), Alternate Part Code: 6642626-1, for ABB Bailey INFI 90 / Symphony Harmony DCS System

ABB IEMMU21 Rear-Mount Module Mounting Unit (MMU), Alternate Part Code: 6642626-1, for ABB Bailey INFI 90 / Symphony Harmony DCS System Core Function Description The IEMMU21 is a 19-inch rack-mounted backplane chassis designed exclusively for ABB Bailey INFI90 distributed process control DCS platforms: Core Function Description The IEMMU21 is a 19-inch rack-mounted backplane chassis designed exclusively for ABB Bailey INFI90 distributed process control DCS platforms: Provides mechanical housing, slot rails, and integrated multi-layer backplane bus for up to 12 standard INFI90 controller, I/O, communication, and power supply modules (10 slots if two power modules are installed) Distributes four regulated DC power rails (+5V, +15V, -15V, +24V) from system power modules to all inserted modul