Description
Key Technical Specifications
| Parameter | Value |
|---|---|
| Manufacturer | ABB |
| Module Designation | COM0034 |
| ABB Part Number | 2RCA023019A0004C |
| Product Type | Communication Module / PCB |
| Relay Family | ABB Relion 615 Series |
| Associated Models | REF615E-D, REU615E-D, REM615E-D, RED615E-D |
| Functional Role | Communication interface |
| Installation | Internal relay module |
| System Application | Feeder, voltage, motor, and other protection/control applications |
| Protection Functions | Determined by the complete 615-series relay configuration |
| Auxiliary Voltage | Determined by complete relay; examples documented as 48–250 VDC / 100–240 VAC |
| Frequency | 50/60 Hz for applicable complete relay configurations |
| PCB Identification | COM0034 |
| Additional Reference | 111921 / configuration-dependent |
| Country Marking on Some Assemblies | India |
| Lifecycle | Legacy/configuration-dependent |
A critical distinction: 2RCA023019A0004C is the COM0034 communication board, not the complete REF615/REU615/REM615/RED615 relay. Product records show the same COM0034 number installed in different 615-series relay assemblies.
The complete relay’s electrical rating must therefore not automatically be assigned to the COM0034 PCB itself. For example, one documented REF615E-D assembly lists 48–250 VDC / 100–240 VAC auxiliary supply, 100/110/115/120 V nominal voltage, and <10 W consumption; those are specifications of that complete relay configuration, not standalone COM0034 input ratings.
Product Introduction
ABB 2RCA023019A0004C
The ABB 2RCA023019A0004C is an internal communication module used in ABB Relion 615-series protection and control relays. It is identified in assemblies such as REF615E-D, REU615E-D, REM615E-D, and RED615E-D, where it forms part of the relay’s communication architecture.
For maintenance teams, this distinction matters. Replacing is a board-level repair, not a complete protection-relay replacement. The correct board revision, relay model, hardware configuration, firmware compatibility, and communication options need to be confirmed before installation.
COM0034
Application Scenarios & Field Pitfalls
Engineering Pain Point
A protection relay may continue measuring current and voltage correctly while losing station communication. That often leads engineers to replace the entire relay unnecessarily. If local protection functions remain normal but the relay disappears from the substation network, the communication hardware and its configuration deserve attention first.
Typical Applications
- Medium-Voltage Distribution — Communication interface within ABB Relion feeder protection and control relays.
- Utility Substations — Networked protection relays exchanging measurements, status, events, and control information with supervisory systems.
- Industrial Power Distribution — Feeder and motor protection systems integrated into plant electrical automation.
- Switchgear Protection — Communication-enabled protection and control panels where 615-series relays provide local protection and remote monitoring.
Technical Pitfalls to Avoid
- Do not confuse with a complete protection relay.
The part number 2RCA023019A0004C identifies the communication PCB. The complete relay has a separate product designation and configuration code. - Identify the host relay before replacing the board.
has been documented in different 615-series relay assemblies. A board that physically fits is not automatically correct for every firmware or hardware configuration. - Record the complete relay configuration.
Photograph the relay label and record the full order/configuration code before removing . This is more useful than simply recording “REF615.” - Check whether the problem is actually communication hardware.
Verify Ethernet/serial wiring, network switches, addressing, protocol configuration, and station settings before condemning the internal communication board. - Do not transfer configuration blindly.
Protection settings and communication parameters are separate concerns. A replacement communication board may require system-specific configuration after installation. - Preserve the original firmware information.
Hardware compatibility alone is not sufficient. Firmware revision and the complete relay’s configuration can determine whether the replacement operates correctly. - Check the relay’s communication LEDs and diagnostics.
If local protection and HMI functions remain available but network communication fails, use the relay diagnostics to distinguish a physical-link problem from an internal communication-module problem. - Avoid assigning complete-relay voltage ratings to .
Documented 615-series relay assemblies may have auxiliary supplies such as 48–250 VDC / 100–240 VAC, but those values describe the complete relay. They should not be treated as board specifications. - Use ESD protection during board replacement.
is an electronic PCB installed inside a protection relay. Use appropriate antistatic handling procedures and avoid touching exposed circuitry. - Perform communication testing after installation.
Do not stop when the relay powers up. Confirm the network link, station communication, remote measurements, event reporting, time synchronization if applicable, and SCADA/control-system visibility.
Related Products
- ABB REF615E-D — Feeder protection and control relay. can form part of the internal hardware assembly. The complete relay provides feeder protection functions; itself does not replace the complete relay.
- ABB REU615E-D — Voltage protection and control relay. Documented assemblies use / 2RCA023019A0004C as part of the relay hardware. The application is voltage protection rather than standard feeder protection.
- ABB REM615E-D — Motor protection and control relay. appears in documented REM615E-D assemblies, providing the communication portion of the relay architecture. Motor protection functions come from the complete relay configuration.
- ABB RED615E-D — Voltage/differential protection relay family. Documented hardware listings also associate / 2RCA023019A0004C with RED615E-D assemblies.
- ABB REF615 — Earlier/related feeder protection relay family. It is relevant when maintaining 615-series protection installations, but exact communication hardware and firmware should be checked before substitution.
- ABB RET615 — Transformer protection and control relay in the same Relion 615 family. It uses a different protection application, although the broader hardware architecture shares the 615-series platform concept.
- ABB REG615 — Generator/interconnection protection and control relay in the Relion 615 family. It is useful when tracing common 615-series hardware and configuration practices, but its protection application differs from REF615.
- ABB REM615 — Motor protection and control relay. It is the relevant 615-series alternative when the application involves motor protection rather than feeder protection.
- ABB COM modules within Relion 615 — Other communication configurations may exist depending on protocol and relay order code. The exact communication hardware should be determined from the complete relay configuration rather than assumed from the model family.
