ABB PM876 3BDH000607R1 AC 800M Series Central Processing Unit
Manufacturer: ABB
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Part Number: PM876 3BDH000607R1
Condition：New with Original Package
Product Type: Central Processing Units
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Country of Origin: Sweden
Payment:T/T, Western Union
Shipping port: Xiamen
Warranty: 12 months
ABB PM876 3BDH000607R1 Central Processing Unit
The ABB PM876 3BDH000607R1, also cataloged as the PM876 CPU Controller, operates as a dedicated hardware component for high-availability process automation and logic execution within Symphony Plus Melody Rack and System 800xA network platforms.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | PM876 (3BDH000607R1) |
| Brand | ABB |
| Origin | SWEDEN |
| Weight | 2.06 kg |
| Dimensions | 300 mm x 400 mm x 130 mm |
| Operating Temp | Standard industrial cabinet range |
| Power Consumption | System standard dependent |
| Communication Interfaces | 1x Onet, 1x Cnet (redundant), 1x Fnet (redundant), 2x PROFIBUS DPV2, 1x Ethernet |
| Protocols Supported | PROFIBUS DP, Modbus TCP, IEC 61850 |
Industrial Control & Firmware Architecture
The PM876 utilizes advanced backplane bus communication velocity to maintain deterministic data exchange across distributed control nodes. Firmware management is facilitated through an integrated USB interface, allowing for version control and compatibility updates without requiring complete system off-lining. The architecture supports I/O density scaling through modular expansion and maintains synchronization in high-availability configurations via redundant Cnet and Fnet links. Firmware flash compatibility is verified against the specific system software revision to ensure stable boot-up cycles and register mapping.
Frequently Asked Questions
Q: Does the PM876 support hot-swapping during active process operations?
A: Yes, the module is engineered for hot-swappable replacement. When configured in a redundant pair using the NT031 link cable, the secondary controller assumes master control, allowing the primary unit to be extracted without interrupting the control loop.
Q: How is data integrity maintained during a power loss event?
A: The controller utilizes an integrated 30 g Lithium Metal battery to provide localized power for non-volatile data retention, ensuring the integrity of process variables and configuration parameters during transient power failures.
Field Installation Guidelines
- Mounting and Orientation: Ensure the module is installed in a vertical orientation within the Symphony Plus Melody Rack to facilitate natural convection cooling. Maintain at least 50 mm of clearance above and below the unit for airflow.
- Grounding and Shielding: Utilize high-integrity shielding for all PROFIBUS and Ethernet communication cables. Connect cable shields to the designated chassis ground point to mitigate common-mode noise and electromagnetic interference (EMI).
- Battery Handling: Before initial operation, verify that the battery activation tab is removed if applicable. Replace the lithium battery every 2-3 years, or immediately upon the generation of a low-battery diagnostic alarm, to prevent potential data loss.
- Cable Management: Route redundant communication paths (Cnet/Fnet) through separate physical cable trays to prevent single points of failure caused by mechanical cable damage.