Functional Description

The ABB RB520 (3BSE003528R1) is a dummy module (filler module) used in ABB Advant OCS / Advant Master controller systems. It is installed in unused submodule positions to maintain the mechanical and electrical integrity of the rack configuration.

The RB520 does not perform control processing, signal acquisition, or communication functions. Its main purposes are:

Filling unused submodule carrier slots
Maintaining correct rack configuration
Providing mechanical protection for unused positions
Preserving airflow and shielding inside the control cabinet
Preventing incorrect installation of active modules

Technical Specifications
Parameter Specification
ABB Type Designation RB520
Article Number 3BSE003528R1
Module Type Dummy / Filler Module
System ABB Advant OCS / Advant Master AC450 family
Installation Location Submodule slot / carrier position
Weight Approx. 0.028 kg
Dimensions Approx. 185 × 84 × 28 mm (depending on version/source)
Function Slot termination / unused position cover

Typical Applications

The RB520 is commonly found in ABB legacy control systems such as:

ABB Advant Controller AC450
ABB Advant Master systems
ABB Advant OCS DCS platforms
Industrial process control cabinets

Typical industries include:

Power generation
Oil & gas
Chemical processing
Pulp and paper
Water treatment
Manufacturing plants

Related ABB Modules
Module Description
RB510 (3BSE003527R1) Dummy module for submodule carrier
RB520 (3BSE003528R1) Dummy module for submodule slot
RB530 (3BSE003529R1) Dummy module for S500 plug-in unit single
RB540 (3BSE004693R1) Dummy module for S500 plug-in unit double

Maintenance Notes

When maintaining ABB Advant systems:

Keep unused slots equipped with the correct dummy modules.
Do not replace RB520 with active I/O or communication modules without engineering configuration.
Verify rack type and carrier compatibility before replacement.
For discontinued Advant systems, original spare RB520 modules are typically used for lifecycle support.

Recommended other models：