The ABB COZBU 103 312/2 (Revision R1C) is a specialized communication interface board from the NEMCA series. This card is designed to facilitate high-speed data transmission and protocol conversion within ABB’s legacy control systems and power electronic assemblies. It serves as a vital bridge for system-level networking, ensuring synchronized communication between the central controller and peripheral I/O or drive modules.
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Product Specifications
| Feature | Details |
| Model Name | COZBU 103 312/2 |
| Revision | R1C |
| Product ID | COZBU 103 312/2 R1C |
| Country of Origin | Germany / Switzerland |
| Function | Communication Interface / Bus Coupler |
| Dimensions (WxHxD) | 233 x 160 x 20 mm (Standard Eurocard) |
| Net Weight | 0.48 kg |
| Power Consumption | +5V / +24V DC (via Backplane) |
| Interfaces | RS-232 / RS-485 / Specialized Fieldbus |
Operational Precautions
- Revision Compatibility: Ensure the R1C suffix matches your existing hardware; installing a different revision in a redundant system can cause bus synchronization errors.
- Jumper Configuration: Before swapping the card, document the jumper positions and DIP switch settings of the faulty unit and mirror them exactly on the replacement board.
- ESD Handling: This communication card uses high-speed logic buffers sensitive to static electricity. Always use a grounded anti-static wrist strap during installation.
- Backplane Insertion: To avoid damaging the 96-pin DIN connectors, align the card carefully with the rack guides and apply firm, even pressure until the locking levers are engaged.
FAQ (Questions & Answers)
Q: What is the primary role of the COZBU 103 312/2? A: It is typically used as a bus controller or communication gateway, allowing different segments of a control system to exchange process data and diagnostic messages.
Q: Is this card “Hot-Swappable”? A: No. In most NEMCA/COZBU rack systems, power must be removed from the subrack before inserting or removing communication cards to prevent data corruption or electrical damage.
Q: Does the “R1C” designation affect the firmware? A: Yes, the Revision R1C often implies specific onboard firmware or hardware optimizations. Always verify that your system software supports this specific hardware revision.
Similar Communication & Control Models
- COZBU 103 312/1: Earlier version with different port configurations.
- COZBU 101: Basic communication interface for local rack segments.
- NEMCA 103: Main processor or higher-level communication module for the series.
- SDCS-COM-8: Modern equivalent communication board for DCS series drives.
- 3BHE022293R0101: Optical communication interface for power electronic stacks.
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