ABB DSBB170A 57310256-EB Replacement for ADVANT MOD 300

Product Overview

ABB DSBB170A 57310256-EB Replacement for ADVANT MOD 300: Seamless DCS Backplane Upgrade

The ABB DSBB170A (part number 57310256-EB) is the Bus Backplane Board at the heart of the ADVANT MOD 300 Distributed Control System. As ABB progressively phases out legacy ADVANT hardware in favor of the System 800xA platform, facilities running MOD 300 controllers face increasing pressure to source reliable backplane replacements before OEM support windows close entirely. TOPNLMS stocks tested, ready-to-ship DSBB170A units to help your engineering team execute a controlled, low-risk migration rather than an emergency shutdown repair.

The DSBB170A backplane provides the passive bus interconnect that links processor modules, I/O modules, and communication modules within the MOD 300 rack. Its 57310256-EB revision designation confirms compatibility with the full range of ADVANT MOD 300 controller families, including the AC 450 and AC 410 processor boards. When a backplane fails or shows intermittent bus errors, the entire rack loses communication integrity — making a verified replacement unit the fastest path back to stable operation without rewriting control logic or reconfiguring field wiring.

Compatibility Comparison Table

Seamless Upgrade Solutions

A successful DSBB170A backplane replacement rarely happens in isolation. In most MOD 300 retrofit projects, the backplane swap is one step in a broader system stabilization or migration effort. During installation, engineers frequently inspect and replace adjacent components to avoid repeat outages.

The processor module seated directly on this backplane — typically an ABB DSPC172 or DSPC176 AC 450 CPU board — should be tested for firmware currency and memory integrity before the new backplane is commissioned. If the processor is also end-of-life, sourcing a tested DSPC172 alongside the DSBB170A eliminates a second maintenance window. Similarly, the rack power supply modules such as the DSBC172A or DSBC176A supply the 24 VDC rail that feeds the backplane bus; a degraded power supply can cause the same bus error symptoms as a failed backplane, so both should be verified during the same outage.

On the I/O side, the DSDI110A digital input modules and DSDO115A digital output modules plug directly into the backplane slots. If the backplane failure was caused by a slot-level short or overcurrent event, the adjacent I/O modules should be bench-tested before reinsertion. For analog process signals, the DSAI130A analog input module and DSAO120A analog output module are common companions in MOD 300 process control cabinets and should be included in the pre-commissioning checklist.

Communication continuity is equally critical. The DSCB110 communication board handles the AF100 fieldbus link between the MOD 300 controller and remote I/O stations or supervisory SCADA systems. If the backplane failure disrupted AF100 traffic, the DSCB110 should be reseated and its termination resistors verified. For sites integrating MOD 300 with modern DCS or SCADA via PROFIBUS DP, the DSCS140 communication module provides the gateway function and should be confirmed operational after the backplane swap. In control cabinets where signal isolation is required between field instruments and the backplane bus, DSAX110 signal conditioning modules are frequently installed in adjacent DIN-rail positions and should be inspected for continuity.

Finally, for engineers performing the first live commissioning after a backplane replacement, an ABB TK212A programming cable or equivalent AMPL/MasterView 800 connection is required to verify controller status, download the control application, and confirm I/O mapping before returning the loop to automatic mode. Having this cable and a laptop with the correct ADVANT Builder or Control Builder M software version on-site before the maintenance window begins is essential to minimizing total downtime.

Retrofit Guidance FAQ

Q: Do I need to rewire field terminals when replacing the DSBB170A backplane?
A: No. The DSBB170A is a passive backplane — all field wiring connects to the I/O modules, not the backplane itself. Replacing the backplane requires only removing the rack modules, swapping the backplane board, and reinserting the modules. Field terminal blocks remain undisturbed.

Q: Will my existing AC 450 control application run without modification after the backplane swap?
A: Yes, provided the replacement DSBB170A carries the same 57310256-EB revision. The control application resides in the DSPC172/DSPC176 processor module’s battery-backed RAM. As long as the processor module is handled correctly during the swap (battery intact, module not powered down for extended periods), the application is preserved and will resume execution on the new backplane without reprogramming.

Q: Is the DSBB170A compatible with both AF100 and MB300 communication modules?
A: Yes. The 57310256-EB revision of the DSBB170A supports both the ADVANT Fieldbus 100 (AF100) and the MB300 internal bus, making it compatible with the full range of MOD 300 communication modules including the DSCB110 and DSCS140.

Q: What is the physical installation space requirement?
A: The DSBB170A fits the standard ABB ADVANT MOD 300 19-inch rack enclosure. No cabinet modifications are required. Verify that the rack model matches (S100 I/O rack vs. MOD 300 controller rack) before ordering, as backplane form factors differ between rack types.

Q: Can this backplane be used in a System 800xA migration project?
A: The DSBB170A is a MOD 300 native component. In a full System 800xA migration, the MOD 300 rack and backplane are typically decommissioned and replaced with S800 I/O stations. However, for phased migrations where MOD 300 racks remain operational during the transition, the DSBB170A extends the service life of existing hardware while the new 800xA infrastructure is commissioned in parallel.

Q: How do I verify the backplane is functioning correctly after installation?
A: After reinserting all modules and applying rack power, use the DSPC172/DSPC176 processor’s front-panel LED indicators to confirm bus communication status. Connect via TK212A programming cable and use ADVANT Builder or Control Builder M to verify all I/O module addresses are recognized and the control application has resumed in RUN mode before releasing the loop to automatic control.

Warranty Assurance

Every DSBB170A 57310256-EB unit shipped by TOPNLMS is covered by a 12-month warranty from the date of delivery. Prior to shipment, each unit undergoes a functional inspection including visual examination for physical damage, connector pin integrity check, and board-level continuity verification. Units that do not pass inspection are not listed for sale.

If a unit is found to be defective on arrival (DOA) or fails within the warranty period under normal operating conditions, TOPNLMS will arrange a replacement shipment or issue a refund — whichever the customer prefers. Our after-sales response target is within 24 hours on business days. Customers are asked to retain the original packaging and provide a brief fault description to expedite the warranty claim process.

For urgent plant maintenance situations, we recommend contacting us directly by phone or email before placing an order so we can confirm stock availability, estimated shipping time, and any export documentation requirements for your destination country. We ship globally from Xiamen, China, with DHL Express, FedEx International Priority, and UPS Worldwide Expedited as standard carrier options.

TOPNLMS is an independent supplier of industrial automation components. We are not an authorized ABB distributor. All ABB trademarks and part numbers are referenced for compatibility identification purposes only.