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Product Introduction
The ABB PM876-1 (3BDH000707R1) is a powerful and high-performance CPU module designed for use within the ABB AC 800M controller family. It is primarily used in process automation applications where speed, flexibility, and reliability are critical. The PM876-1 serves as the central processing unit of the control system, enabling seamless communication with I/O modules, field devices, and supervisory systems via multiple industrial protocols. Built with a robust design, it ensures uninterrupted operation even in demanding industrial environments such as oil & gas, chemical, power, and water treatment facilities.
Key Features and Advantages
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High Processing Performance: Equipped with a fast processor and optimized memory architecture for real-time execution of control tasks.
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Large Memory Capacity: Supports complex applications with extensive logic and large configuration data.
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Redundancy Support: Enables CPU redundancy for mission-critical systems to maximize uptime.
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Modular Integration: Seamlessly integrates into the ABB 800xA system and connects with various communication modules like CI854, CI870.
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Versatile Communication: Supports multiple protocols including Ethernet, MODBUS, PROFIBUS, and FOUNDATION Fieldbus through expansion interfaces.
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Rugged Industrial Design: Engineered to withstand harsh operating conditions including temperature variation, vibrations, and electrical noise.
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Secure Operations: Integrated protection against unauthorized access and program manipulation.
Technical Specifications
| Parameter | Specification |
|---|---|
| Product Name | PM876-1 |
| ABB Ordering Code | 3BDH000707R1 |
| Processor Type | High-performance industrial CPU |
| Internal Memory (RAM) | 64 MB |
| Flash Memory | 16 MB |
| Operating System | Real-time OS (ABB proprietary) |
| Communication Ports | 2x Ethernet (RJ45), 1x Service Port |
| Supported Protocols | MODBUS TCP/IP, Ethernet/IP, PROFIBUS, etc. |
| Redundancy Support | Yes (CPU Redundancy Pairing) |
| Mounting | DIN rail mounting |
| Power Supply Voltage | 24 V DC |
| Power Consumption | Approx. 6 W |
| Operating Temperature | -25°C to +70°C |
| Storage Temperature | -40°C to +85°C |
| Relative Humidity | 5% to 95%, non-condensing |
| Dimensions | 185 × 100 × 60 mm |
| Weight | 0.65 kg |
Applications
The ABB PM876-1 is ideally suited for advanced control applications across a wide range of industries:
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Oil and Gas Processing Units
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Power Generation (Thermal, Hydro, Nuclear)
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Chemical Manufacturing Plants
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Water and Wastewater Management
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Pulp and Paper Mills
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Pharmaceutical Automation
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Metal & Mining Process Control
It is specifically designed for applications that require high-speed processing, complex logic handling, and system redundancy.
Installation Instructions
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Ensure Proper Environment: Install the PM876-1 in a clean, vibration-free control cabinet with suitable airflow.
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Mounting: Secure the unit on a DIN rail using mounting clips provided. Ensure correct vertical orientation.
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Connect Power: Supply 24 V DC using shielded cables to reduce electrical noise.
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I/O and Communication Wiring: Connect to I/O modules and communication interfaces (e.g., CI854 for PROFIBUS).
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Firmware Configuration: Use ABB Control Builder M or 800xA system software to configure the CPU, download the application, and set up communication protocols.
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Testing: Perform loop checks and validation to ensure accurate system integration before commissioning.
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Redundancy Setup (optional): For critical applications, install a second PM876-1 and connect via redundancy link as per ABB guidelines.
Frequently Asked Questions (FAQ)
Q1: What is the main function of the PM876-1 CPU module?
A1: It acts as the central controller for processing logic and managing communications in ABB’s AC 800M system.
Q2: Can PM876-1 be used in redundant configurations?
A2: Yes, it fully supports CPU redundancy to enhance system reliability and prevent downtime.
Q3: What is the recommended software for programming the PM876-1?
A3: ABB Control Builder M or System 800xA Engineering tools are used for configuration and programming.
Q4: What kind of communication ports does the module have?
A4: It includes dual Ethernet ports and a serial service port for programming and diagnostics.
Q5: Does it support integration with legacy ABB systems?
A5: Yes, it is backward compatible with other ABB modules within the 800xA framework.
Q6: What power supply voltage is required for PM876-1?
A6: The module operates with a 24V DC regulated power supply.
Q7: Can the PM876-1 operate under harsh environmental conditions?
A7: Yes, it is designed for industrial environments with wide temperature and humidity tolerances.
Q8: How do I identify if a firmware update is required?
A8: Use ABB’s Diagnostic Toolset or check via the Control Builder environment during connection.
Q9: What is the lifespan of the PM876-1 module?
A9: When properly maintained, it can reliably operate for over 10 years in typical industrial settings.
Q10: What safety standards does PM876-1 comply with?
A10: It meets industrial safety and EMC compliance standards such as CE, RoHS, and UL.
Related or Compatible Models (Same Series)
| Model Number | Description |
|---|---|
| PM864A 3BSE018161R1 | Compact CPU with Ethernet and redundancy |
| PM865 3BSE031151R1 | High-performance CPU with redundancy |
| PM866 3BSE050198R1 | Enhanced memory CPU for AC 800M |
| PM891K01 3BSE053241R1 | Advanced CPU with expanded I/O capacity |
| CI854AK01 | Communication interface for PROFIBUS |
| CI871K01 | Communication interface for MODBUS |
Popular ABB Models (Same Brand)
| Model | Function | Dimensions (mm) | Weight (kg) |
|---|---|---|---|
| PM864A 3BSE018161R1 | Compact CPU for AC 800M | 186 × 59 × 117 | 0.42 |
| CI854AK01 | PROFIBUS-DP interface module | 110 × 35 × 100 | 0.18 |
| PM865K02 3BSE031151R1 | High-speed CPU with redundancy | 186 × 59 × 117 | 0.46 |
| CI871K01 | MODBUS communication module | 110 × 35 × 100 | 0.20 |
| AI810 3BSE008516R1 | Analog input module (8 channels) | 186 × 59 × 117 | 0.35 |
| DO820 3BSE008514R1 | Digital output module (16 channels) | 186 × 59 × 117 | 0.36 |
| DI830 3BSE008518R1 | Digital input module (16 channels) | 186 × 59 × 117 | 0.34 |
| CI862 3BSE092690R1 | HART protocol communication interface | 110 × 35 × 100 | 0.19 |
