ABB 61336125G Replacement for Symphony Plus / Advant

Product Overview

ABB 61336125G Replacement for Symphony Plus / Advant: Seamless DCS Migration & Smooth Transition

When your ABB Symphony Plus or Advant distributed control system reaches end-of-life or a critical board failure occurs, unplanned downtime is not an option. The ABB 61336125G DCS Control Board is a proven, field-tested replacement module engineered for smooth, low-risk migration from legacy Advant OCS and Symphony Plus architectures. Whether you are retiring an aging Advant Controller AC450, decommissioning an obsolete Advant Controller AC110, or simply replacing a failed board in an active Symphony Plus S800 I/O station, the 61336125G delivers the electrical, mechanical, and protocol compatibility your engineering team demands — without forcing a full system redesign.

This board is designed to slot directly into existing ABB Advant and Symphony Plus racks and backplanes. Mounting dimensions, connector pinouts, and DIN rail footprint are preserved from the original specification, meaning your control cabinet layout, cable harnesses, and terminal wiring remain untouched. Field engineers report that replacement can be completed during a scheduled maintenance window without rewiring the marshalling cabinet or modifying the existing cable schedule.

From a communications standpoint, the 61336125G maintains full compatibility with the MasterBus 300 and PROFIBUS DP protocols commonly deployed across Symphony Plus and Advant installations. If your existing system relies on an Advant Fieldbus 100 segment or a CI854 PROFIBUS communication interface module, the replacement board integrates without requiring protocol gateway additions or firmware bridging. This is particularly valuable in brownfield plants where the control network topology cannot be easily modified.

Power supply compatibility is another critical migration consideration. The 61336125G operates within the standard 24 VDC supply range used across the Symphony Plus S800 I/O family and Advant OCS cabinets. Existing ABB SD821 or SD822 power supply modules continue to serve the replacement board without derating or additional power conditioning. This eliminates one of the most common hidden costs in legacy DCS board replacements.

For sites running ABB 800xA System or Composer Harmony as the engineering and operator interface layer, the 61336125G integrates transparently. No changes to the control builder project, function chart logic, or SFC sequences are required. Your existing IEC 61131-3 programs, PID loop configurations, and alarm management settings remain fully intact after the board swap. This dramatically reduces the validation and re-commissioning effort compared to a full controller migration.

Compatibility Comparison Table

Seamless Upgrade Solutions

A successful DCS migration rarely involves a single board replacement. In most Symphony Plus and Advant retrofit projects, the 61336125G is deployed alongside a coordinated set of supporting modules to ensure system-wide compatibility. During the upgrade process, engineers typically audit and replace the CI854A PROFIBUS DP communication interface module to ensure the fieldbus segment operates at the correct baud rate and node addressing after the control board swap. Where the existing Advant rack uses an older TB820 Modulebus modem, replacement with a current-generation TB820V2 Modulebus optical modem is recommended to maintain signal integrity across the S800 I/O bus.

On the I/O side, the existing AI810 analog input modules and DI810 digital input modules in the S800 I/O station remain fully operational with the 61336125G — no I/O reconfiguration is required. However, if the migration scope includes expanding the I/O count or adding new measurement points, AO810 analog output modules and DO810 digital output modules can be added to the existing I/O station without disrupting the running process. For installations where signal isolation is required between field instruments and the DCS I/O bus, inline signal isolators compatible with the S800 terminal unit wiring standard are recommended.

Power distribution within the control cabinet should also be reviewed during the migration. The existing ABB SD821 24 VDC power supply module typically provides adequate capacity for the 61336125G and the associated I/O station, but if the cabinet load has increased due to added I/O modules or communication interfaces, an SD822 redundant power supply module should be considered to maintain availability targets. For sites with strict SIL requirements, the power supply redundancy configuration should be validated against the safety instrumented system design basis.

Finally, for engineering teams performing the migration remotely or preparing the replacement board offline, an ABB TK212A programming cable or equivalent USB-to-serial adapter compatible with the Advant engineering port is essential for pre-configuration and functional testing before the board is installed in the live cabinet. Having the replacement board pre-configured and bench-tested before the maintenance window significantly reduces on-site commissioning time and minimizes the risk of extended process downtime.

Retrofit Guidance FAQ

Q: Do I need to rewire the terminal blocks when replacing with the 61336125G?
A: No. The 61336125G uses the same connector and terminal pinout as the original Advant and Symphony Plus control boards. Your existing cable harness, marshalling wiring, and field instrument connections remain unchanged.

Q: Will my existing IEC 61131-3 control programs run without modification?
A: Yes. The 61336125G is a hardware replacement that does not alter the control logic layer. Programs created in ABB Control Builder or Composer Harmony are retained in the controller project and do not require re-compilation or re-download after the board swap, provided the firmware version is compatible.

Q: Is PROFIBUS DP communication maintained after the replacement?
A: Yes. The 61336125G supports PROFIBUS DP at the same baud rates and node addresses as the original board. No changes to the PROFIBUS segment configuration, GSD files, or DP master parameters are required.

Q: Does the replacement board fit in the existing cabinet slot?
A: Yes. The 61336125G has the same physical dimensions and rack mounting interface as the original Advant and Symphony Plus control boards. No cabinet modification, additional DIN rail, or slot adapter is required.

Q: What if my system uses MasterBus 300 instead of PROFIBUS?
A: The 61336125G is compatible with MasterBus 300 communication architecture. The existing MasterBus segment, node addressing, and communication parameters are preserved after the replacement.

Q: How do I verify the replacement board before installing it in the live system?
A: TOPNLMS performs a pre-shipment functional test on every 61336125G unit. Additionally, engineering teams can perform bench testing using an ABB TK212A programming cable connected to the engineering port before the board is installed in the production cabinet.

Warranty Assurance

Every ABB 61336125G DCS Control Board supplied by TOPNLMS is covered by a 12-Month Warranty from the date of shipment. Prior to dispatch, each unit undergoes a documented functional test to verify board initialization, communication interface operation, and power supply compatibility. Units that do not pass the pre-shipment test are not shipped.

In the event of a warranty claim, TOPNLMS provides a replacement unit or full refund within the warranty period. Our after-sales response team is reachable at [email protected] or +86 18359293191 and responds to warranty inquiries within one business day. Replacement units for warranty claims are prioritized for dispatch from our Xiamen warehouse to minimize the impact on your production schedule.

For procurement teams requiring documentation, TOPNLMS can provide a test report, packing list, and commercial invoice for each shipment. All units are shipped with ESD-protective packaging and appropriate export documentation for international customs clearance.

Stock availability is maintained for the 61336125G to support both planned maintenance schedules and emergency breakdown replacements. Contact our team to confirm current inventory levels and lead times before raising a purchase order.