ABB 3BSE003879R1 BB174 Backplane – 4-Slot I/O Bus for Advant Controller 110

Product Overview

The ABB 3BSE003879R1, commercially designated BB174, is a four-slot backplane (I/O bus carrier) that forms the mechanical and electrical backbone of an ABB SattLine / Advant Controller 110 I/O subgroup. In an industrial control cabinet, the ABB 3BSE003879R1​ is the passive printed-circuit backbone onto which up to four I/O modules—digital input, digital output, analog input, analog output, counter or communication interface—are mounted in a defined physical order. It distributes the 24 V DC operating supply, the module address lines, the data and control bus, and the shield reference from the controller to each module, while presenting a single, reproducible termination point for the field wiring. It is not a processor and it does not execute control logic; its value lies in doing something much less forgiving than computation: maintaining signal integrity, address integrity and ground integrity for every I/O point in the subgroup, silently, for decades.

The ABB 3BSE003879R1​ belongs to the BB170-series backplane family and is the four-slot member of that family, intended to be mounted in a 19-inch equipment rack as part of an ABB MasterPiece 200 / Advant Controller 110 / SattLine installation. A complete I/O subgroup is built by placing the appropriate mix of modules—for example DI, DI, DO, AI—into the four slots of the ABB 3BSE003879R1, connecting the bus extender to the previous or next backplane, and routing the field cables to the module terminals. The backplane enforces the slot numbering, which is not a cosmetic detail: in SattLine and Advant OCS addressing, the physical slot determines the I/O point address, so a module moved one position changes the process-variable map seen by the controller. This is why a damaged backplane is a serious fault—it can make a perfectly good I/O module appear failed, and it can do so intermittently, which is the most expensive kind of fault in a control system.

Constructed on a glass-fiber reinforced epoxy laminate with gold-plated edge connectors and a continuous ground plane, the ABB 3BSE003879R1​ is designed for the conducted and radiated interference of a switchgear and drive room. The bus is shielded, the supply is decoupled at the plane, and the module guides are precision-formed so that the 96-way connector mates squarely without pin splay. Rated IP20 for indoor cabinet use, the backplane operates from -25 °C to +70 °C and carries CE, RoHS and UL recognition. For plants operating 1980s and 1990s-vintage SattLine and Advant Controller 110 systems, the ABB 3BSE003879R1​ is the current-production continuation spare that preserves the rack layout, the module order, the addressing scheme and the field terminations—no re-engineering, no control-strategy rewrite, no cabinet modification.

Technical Specifications