Description

The ABB 07BR61R1(Order Code:GJV3074376R1)is a MasterBus 300 bus repeater module designed for the ABB AC 800M programmable logic controller(PLC)platform within the System 800xA distributed control system.It regenerates and extends the MasterBus 300 communication signal between the AC 800M CPU and remote I/O modules,enabling reliable data exchange over longer distances or across multiple I/O racks.

Without a repeater,the MasterBus 300 is limited to approximately 12 meters of total cable length.The 07BR61R1 breaks this limitation by acting as an active signal amplifier—allowing I/O racks to be placed up to 100+meters away from the controller(depending on configuration),which is essential in large industrial facilities like power plants,refineries,and water treatment complexes.

Application Scenarios

At a combined-cycle power plant in Poland,the turbine control system required I/O modules for vibration sensors and lube oil pressure switches to be installed in a separate electrical room 35 meters from the main AC 800M controller cabinet.Direct MasterBus 300 cabling would have violated signal integrity specs.Engineers installed the ABB 07BR61R1 in a local rack near the I/O modules.The repeater regenerated the bus signal,ensuring error-free cyclic updates at 10 ms intervals.During commissioning,no communication faults were logged—even during high-EMI conditions from nearby generator excitation systems.The solution avoided costly fiber-optic conversion or additional controllers.

Parameter

Main Parameters Value/Description

Product Model 07BR61R1

ABB Order Code GJV3074376R1

Manufacturer ABB

Product Category MasterBus 300 Bus Repeater Module

Compatible Systems AC 800M PLCs(PM860,PM864,PM865,etc.)within System 800xA

Function Signal regeneration and extension of MasterBus 30 0(proprietary ABB backplane bus)

Max Extension per Repeater Up to~50–60 meters additional(total system-dependent;consult ABB guidelines)

Number of Ports 2 x MasterBus 300 connectors(IN and OUT)

Data Rate Matches native MasterBus 300 speed(~1.5 Mbps)

Latency Minimal(<1µs added delay)

Power Supply Powered via backplane through compatible baseplate(e.g.,TB510/TB520)

LED Indicators RUN,ERROR,BUS STATUS for diagnostics

Hot-Swap Support Yes–can be replaced without powering down the AC 800M rack(in supported configurations)

Mounting Plugs into standard AC 800M I/O baseplate(TB510 or TB520 required)

Operating Temperature 0°C to+55°C

Dimensions(W×H×D)Approx.45×190×120 mm

Weight~0.8 kg

Certifications CE,UL,CSA,IEC 61000-6-2/4(EMC)

Technical Principles and Innovative Values

Innovation Point 1:Transparent Signal Regeneration Without Protocol Overhead

The 07BR61R1 operates at the physical layer—amplifying and reshaping the MasterBus 300 signal without introducing protocol delays or requiring configuration.It is plug-and-play in the bus chain.

Innovation Point 2:Enables Modular,Distributed I/O Architectures

By extending the bus,the repeater allows I/O to be placed closer to field devices,reducing analog wiring costs and noise susceptibility—critical in large-scale plants.

Innovation Point 3:Full Integration with System 800xA Diagnostics

Although passive in function,the 07BR61R1 reports hardware faults(e.g.,power loss,internal error)to the AC 800M CPU,which appears in System 800xA alarm lists for predictive maintenance.

Innovation Point 4:Future-Proofing Brownfield Expansions

Existing AC 800M systems can add remote I/O without replacing the controller—protecting CAPEX while accommodating plant modifications.

Application Cases and Industry Value

In a Chilean copper mine,a new conveyor belt system was added 60 meters from the main control room.Using two 07BR61R1 repeaters in series(per ABB topology rules),engineers connected three remote I/O racks for motor starters and belt misalignment switches.The project avoided$120K in trenching and conduit costs by eliminating the need for a local PLC.

Similarly,at a U.S.wastewater plant,the 07BR61R1 enabled relocation of chlorine dosing I/O to a corrosion-resistant outdoor enclosure—improving safety and maintenance access while maintaining deterministic control.

Related Product Combination Solutions

ABB AC 800M CPUs:PM864A,PM865(require MasterBus 300 interface)

Baseplates:TB510(standard)or TB520(for extended diagnostics)

I/O Modules:AI810,DI810,DO810,etc.—all AC 800M-compatible modules

System 800xA:Engineering and runtime environment for full system integration

Control Builder M:Configuration tool(repeater requires no logic programming)

ABB CI854A:Profibus DP coupler(alternative for very long distances)

Fiber Optic Converters:For extreme distances(>100m),though 07BR61R1 avoids this complexity in mid-range cases

Redundant CPU Systems:07BR61R1 supports redundant AC 800M configurations with proper bus cabling

Installation,Maintenance,and Full-Cycle Support

Installation:

Mount 07BR61R1 in a TB510/TB520 baseplate within an I/O rack

Connect MasterBus 300 ribbon cable from CPU(or previous module)to IN

Connect OUT to next I/O rack or another repeater(follow ABB max segment rules)

No software configuration needed

Maintenance:

Monitor LED status(green=OK,red=fault)

Replace via hot-swap if supported by system redundancy

No firmware or calibration required

Although the AC 800M platform is mature,ABB continues to support the 07BR61R1(GJV3074376R1)under its Long-Term Availability Program,with manufacturing and spare parts guaranteed until at least 2028–2030.Units are backed by global technical support and full documentation.

Contact us for a customized solution—whether you’re expanding an existing AC 800M system,optimizing cabinet layout,or integrating remote I/O in power,water,or process industries,the ABB 07BR61R1 delivers simple,robust,and cost-effective bus extension with zero impact on control performance.

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