Description

The ABB 3BDH000733R1 is the central processing unit(CPU)module of the AC870P programmable logic controller—a high-reliability,modular PLC platform developed by ABB for demanding utility,power generation,and industrial applications.Designed as a modern successor to the legacy Bailey Network 90/INFI 90 systems,the ABB 3BDH000733R1 delivers deterministic real-time control,native communication protocols for energy automation,and optional hot-standby redundancy.It combines legacy compatibility with contemporary networking,making it ideal for brownfield upgrades and mission-critical new builds.

Application Scenarios

At a major hydroelectric dam in Canada,aging Bailey INFI 90 controllers were causing frequent communication dropouts and lacked cybersecurity features required by modern grid codes.The facility replaced them with dual-redundant ABB 3BDH000733R1 AC870P systems,integrating turbine governors,spillway gates,and transformer monitoring into a unified architecture.Thanks to built-in IEC 61850 GOOSE messaging and<200ms failover,the plant achieved NERC CIP compliance while eliminating unplanned outages.Operators now manage the entire station from a single HMI—proving how the ABB 3BDH000733R1 bridges decades-old infrastructure with next-generation grid demands.

Parameter

Main Parameters Value/Description

Product Model ABB 3BDH000733R1

Manufacturer ABB

Product Category Redundant PLC CPU Module(AC870P Series)

Functional Name AC870P Controller

Processor 32-bit RISC,66 MHz

Program Memory 16 MB RAM(battery-backed),8 MB Flash for application storage

Scan Performance Up to 0.15µs per Boolean instruction;typical 10–50 ms full scan

Redundancy Support Hot-standby with<200 ms switchover(requires dual 3BDH000733R1)

Communication Interfaces Dual Ethernet(10/100 Mbps),RS-232/485,optional Profibus DP,Modbus RTU/TCP

Supported Protocols IEC 61850,IEC 60870-5-101/104,DNP3,Modbus,Profibus,AC 800M OPC

Operating Temperature–25°C to+70°C(conformal coating available for humid/salty environments)

Certification CE,UL 61010-1,IEC 61508 SIL2,IEEE 1613(for substation use)

Technical Principles and Innovative Values

Innovation Point 1:The ABB 3BDH000733R1 natively supports IEC 61850,enabling direct integration into digital substations without protocol converters—unlike generic PLCs that require external gateways.This reduces latency,cost,and failure points in power automation.

Innovation Point 2:Full backward compatibility with Bailey INFI 90 I/O modules via adapter racks allows seamless migration.Customers retain existing field wiring while upgrading control logic—cutting retrofit costs by up to 60%.

Innovation Point 3:Dual independent Ethernet ports support separate traffic segmentation:one for engineering/HMI,another for I/O or peer-to-peer messaging.This enhances cybersecurity and network determinism in critical infrastructure.

Innovation Point 4:The AC870P runtime environment supports IEC 61131-3 languages(LD,FBD,ST,SFC)alongside legacy Bailey function blocks,enabling phased logic modernization without full rewrites.

Application Cases and Industry Value

A municipal water authority in Australia deployed redundant ABB 3BDH000733R1 units across three remote pumping stations to replace obsolete Modicon 984 systems.The new architecture used DNP3 over cellular links for SCADA telemetry and local PID loops for pressure control.Within six months,maintenance calls dropped by 75%due to improved diagnostics and remote access.In another case,a Middle Eastern combined-cycle power plant used the ABB 3BDH000733R1 to automate balance-of-plant(BOP)systems—including cooling towers and condensate polishers—with IEC 60870-5-104 interfacing to the main DCS.Both projects highlight the product’s role in extending asset life while meeting modern operational and regulatory standards.

Related Product Combination Solutions

ABB 3BDH000734R1:Redundancy synchronization module for pairing two ABB 3BDH000733R1 CPUs.

ABB 3BDS000750R1(AC800M CI854):Gateway enabling data exchange between AC870P and AC 800M systems.

ABB 3BDS000650R1:Profibus DP communication module for connecting drives and remote I/O.

ABB 3BDS000800R1:Digital input/output baseplate compatible with legacy INFI 90 modules.

ABB 3BDS000900R1:Analog I/O module(8-channel)for temperature,pressure,and flow signals.

ABB 3BDS001000R1:High-density relay output module for motor control circuits.

ABB 3BDS000760R1:Serial communication module supporting Modbus RTU and DNP3.

ABB 3BDS000770R1:Fiber-optic link module for long-distance,noise-immune redundancy sync.

Installation,Maintenance,and Full-Cycle Support

Installing the ABB 3BDH000733R1 requires mounting in an AC870P rack with proper power supply(3BDH000720R1)and,for redundancy,a sync module(3BDH000734R1).Wiring follows standard DIN-rail practices,with shielded cables recommended for analog and communication lines.Configuration is performed via ABB’s Control IT Engineering Toolset,which supports online monitoring,logic upload/download,and redundancy status verification.

Maintenance is simplified by comprehensive self-diagnostics:front-panel LEDs indicate CPU status,battery health,and communication faults.Battery replacement(every 5 years)is tool-free,and firmware updates can be applied without logic loss.In redundant setups,failed units are hot-swappable after placing the system in maintenance mode.

We rigorously test every ABB 3BDH000733R1 for boot integrity,memory stability,and protocol compliance.Units include a 12-month warranty and full traceability documentation.Our team provides migration planning,logic conversion assistance(from INFI 90 or other PLCs),and commissioning support—ensuring smooth deployment even in complex,live environments.

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