ABB DO802 3BSE022364R1 Replacement for AC800M S800

Product Overview

ABB DO802 3BSE022364R1 Replacement for AC800M S800 I/O: Seamless Migration & Upgrade Solution

The ABB DO802 (3BSE022364R1) is an 8-channel digital output relay module designed for the ABB AC800M distributed control system platform, operating within the S800 I/O family. For facilities running legacy AC800M controllers — including older PM861, PM864, or PM865 processor modules — the DO802 represents a direct, wiring-compatible replacement that eliminates the need for panel rewiring, I/O address remapping, or control cabinet structural modification.

Whether your existing DO802 has failed, is approaching end-of-life, or your site is migrating from an older ABB Advant OCS or MOD 300 architecture to the current AC800M platform, this module provides a validated upgrade path with minimal engineering overhead. The relay output design (250 VAC / 5 A per channel) is electrically identical to earlier-generation ABB digital output modules, ensuring that existing field wiring to actuators, solenoid valves, motor starters, and signal lamps can be reconnected without modification.

Compatibility Comparison Table

Seamless Upgrade Solutions

A successful AC800M I/O migration rarely involves a single module swap. In practice, engineers replacing a failed or obsolete DO802 will also evaluate the surrounding system architecture. The TB820V2 Modulebus modem and TU830V1 terminal unit are the standard mounting and communication interface components for the DO802 within an S800 I/O station — both should be inspected and replaced if showing signs of wear or corrosion.

For sites migrating from Advant OCS, the CI840A PROFIBUS DP adapter module is commonly deployed to bridge legacy field devices to the AC800M controller, allowing the DO802 to coexist with older instrumentation without requiring a full field device replacement. Similarly, the AI810 and AI820 analog input modules are frequently upgraded in the same maintenance window, since they share the same S800 I/O station and Modulebus infrastructure.

Where the control cabinet includes a PM864A or PM866 processor module, engineers should verify that the firmware version supports the DO802’s relay output diagnostics — particularly the open-circuit detection feature introduced in later hardware revisions. The SD802 power distribution module and SS822 power supply unit are also common co-replacements, as aging power infrastructure is a leading cause of intermittent relay output faults that are misdiagnosed as module failures.

For applications requiring signal isolation between the DO802 relay outputs and high-voltage field loads, a signal isolator barrier (such as those in the ABB HART or Pepperl+Fuchs series) is recommended as part of the retrofit bill of materials. Finally, sites using Control Builder M Professional for programming should ensure the hardware library is updated to recognize the DO802’s diagnostic function blocks before commissioning the replacement module.

Retrofit Guidance FAQ

Q: Can I replace the DO802 without rewiring the terminal unit?
A: Yes. The DO802 mounts directly onto the TU830V1 or TU831V1 terminal unit. Field wiring remains connected to the terminal unit throughout the swap — the module itself is hot-swappable in most AC800M configurations, subject to your site’s safety procedures.

Q: Do I need to modify my Control Builder M project after replacement?
A: In most cases, no. If the replacement DO802 carries the same hardware revision, the existing I/O configuration and function block assignments remain valid. If the hardware revision differs, a minor hardware configuration update in Control Builder M may be required before downloading to the controller.

Q: Is the DO802 compatible with PROFIBUS DP or PROFINET architectures?
A: The DO802 communicates via the S800 Modulebus (a proprietary ABB I/O bus), not directly via PROFIBUS DP or PROFINET. Integration with PROFIBUS DP is achieved through the CI840A or CI854A communication interface module mounted in the same I/O station.

Q: What is the physical installation space requirement?
A: The DO802 occupies a standard S800 I/O module slot. No additional cabinet space is required beyond the existing I/O station footprint. The module dimensions are compatible with all standard AC800M S800 I/O station configurations.

Q: Can the DO802 replace older DO810 or DO820 modules?
A: The DO802 is not a direct pin-for-pin replacement for DO810 or DO820 modules, as those use different terminal unit configurations. However, with the appropriate TU830V1 terminal unit and a wiring adaptation, the DO802 can fulfill the same functional role in most relay output applications.

Warranty Assurance

Every ABB DO802 3BSE022364R1 unit shipped from TOPNLMS is covered by a 12-month warranty from the date of shipment. Prior to dispatch, each module undergoes functional verification including output relay actuation testing, Modulebus communication handshake validation, and visual inspection for physical damage or counterfeit indicators.

In the event of a confirmed module defect within the warranty period, TOPNLMS will arrange a replacement unit or issue a full refund — whichever the customer prefers. Our average response time for warranty claims is under 24 hours on business days. Replacement units are dispatched from our Xiamen warehouse with priority shipping to minimize your plant downtime.

For urgent procurement requirements — including same-day quotation, export documentation, and customs clearance support for international shipments — contact our technical sales team directly. We maintain buffer stock of high-demand AC800M S800 I/O modules to support emergency replacement scenarios.

All units are shipped in original or equivalent anti-static packaging with full traceability documentation available upon request.