Description
Product Overview
The ABB DSBB175 is an MXB bus backplane associated with ABB Advant automation and legacy industrial control rack architectures. Its primary role is to provide the physical electrical interconnection between plug-in control and I/O modules installed within the rack. Product references identify DSBB175 as a bus backplane and associate it with ABB AC S100 / Advant Controller 31 environments. Some supplier records also identify the related ABB number 57310256-ER, while other listings show revision or ordering references such as 57310256-CC.
Unlike an active processor or I/O card, a backplane does not perform application logic itself. It provides the common bus and electrical distribution path required for installed modules to communicate and receive system power. For legacy automation maintenance, that makes correct rack compatibility essential. Personally, I would verify the complete part number and revision printed on the board before replacement because supplier databases contain inconsistent descriptions and identifiers for this model.
Technical Specifications — DSBB175
| Parameter | Value |
|---|---|
| Product Model | DSBB175 |
| Manufacturer | ABB |
| Product Type | MXB Bus Backplane |
| System / Platform | ABB Advant / AC S100 |
| Primary Function | Module bus interconnection and rack-level distribution |
| Power Distribution | System backplane supply; exact rating requires verification |
| Communication / Bus | MXB bus |
| Operating Temperature | Not reliably confirmed from primary documentation |
| Mounting | ABB automation rack / backplane assembly |
| Dimensions (H × W × D) | Verify against rack and hardware revision |
| Weight | Approximately 0.1–0.6 kg reported by different suppliers |
| Typical Interfaces | Plug-in module bus and rack electrical connections |
| Related ABB Number | 57310256-ER / 57310256-CC reported |
| Compliance | Verify against the installed ABB system |
Supplier documentation consistently identifies the component as a bus backplane, but physical dimensions, weight, and ordering-number relationships vary considerably between listings. These details should therefore be confirmed from the actual board label and rack documentation before procurement.

ABB DSBB175
Key Features and Benefits — DSBB175
- Provides the common electrical and bus interface for compatible ABB rack modules.
- Supports communication between installed controller and I/O cards through the rack architecture.
- Simplifies replacement of damaged or degraded rack interconnection hardware.
- Suitable for maintaining legacy ABB Advant and AC S100 installations.
- Passive backplane construction reduces the complexity associated with active electronic modules.
- Useful as a maintenance spare when obsolete rack hardware remains critical to plant operation.
- Exact rack and revision matching helps prevent connector and bus incompatibility.
A backplane fault can be deceptively difficult to diagnose because individual processor or I/O cards may appear healthy while intermittent bus contacts, damaged connectors, or power-distribution issues affect the entire rack.
Related Models
DSBB110A — ABB backplane-related reference used in older Advant and S100 control architectures. Verify rack compatibility before substitution.
DSAI146 — ABB analog input module commonly associated with the same broader legacy control-system spare-parts environment.
DSAO110 — ABB analog output module used in compatible legacy I/O architectures, depending on the rack configuration.
DSDI — ABB digital input module family encountered in related Advant/S100 systems.
Installation and Maintenance — DSBB175
Before replacing the backplane, isolate the relevant control-system power and follow the approved ABB maintenance procedure. Record the rack layout, installed module positions, connector orientation, and any visible revision markings.
Inspect mating connectors for oxidation, contamination, bent contacts, or mechanical damage. Check mounting hardware and grounding connections before installation. After replacement, verify rack power distribution and confirm that every installed module is recognized correctly by the control system.
During storage, protect the backplane from moisture, dust, static discharge, and mechanical impact. Keep connectors covered and avoid unnecessary handling of conductive contacts.
Product Warranty — DSBB175
Warranty depends on supplier condition, including new, refurbished, repaired, or used status. Procurement records should specify the exact part number, revision, physical condition, test status, and warranty period. Actual-unit photographs are strongly recommended because available market listings show multiple references and inconsistent physical specifications.
The ABB DSBB175 should be purchased as an exact rack-compatible bus backplane, with the installed system architecture and board revision verified before replacement.
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