Description

The PM 876 (Product ID: 3BDH000607R1) is a high-capacity central processing hardware controller unit belonging to the Symphony Plus distributed control system (DCS) platform. This hardware assembly orchestrates plant-wide control loops, handles process data calculation, and executes complex automation logic across continuous process fields. The PM 876 3BDH000607R1 is built with high-density physical on-board communication interfaces, providing 1 x Onet (Operations Network), 1 x redundant Cnet (Control Network), 1 x redundant Fnet (Field Network), 2 x PROFIBUS DP lines, and 1 x Ethernet channel. To preserve real-time user tables, calibration registers, and volatile memory states through complete main power input disruptions, the controller is shipped complete with an internal lithium metal backup battery cell. Firmware updates, including upgrades or downgrades, can be performed using a standard external USB flash drive or a dedicated system analyzer. When deployed in a redundant controller topology, the module interfaces via a separate NT 031 redundancy link connection cable.

Features

• Central industrial processor module for the Symphony Plus control and communication system architecture.
• Integrated communication network arrays including Onet, redundant Cnet, redundant Fnet, and an Ethernet interface.
• Dual physical built-in PROFIBUS DPV2 master interface channels for extended decentralized instrument loops.
• Flexible local software field servicing supporting quick firmware modification via an external USB-Stick.
• Built-in hardware support for redundant unit configuration paths using the NT 031 redundancy link cable.
• Factory package comes fully populated with a dedicated 30 g lithium metal backup battery cell.

Applications

• Large-scale multi-protocol network routing and processing control in power generation utilities.
• High-availability operations requiring hot-standby CPU redundancy and concurrent fieldbus link control.
• Automation drop consolidation bridging enterprise Ethernet networks with dedicated deterministic plant sub-networks.

Ordering Information

Technical Specifications

Installation Guidelines

• Cabinet Mounting: Secure the central chassis vertically inside a standard grounded control enclosure. Ensure all structural lock tabs engage completely to withstand vibration and establish an electrical grounding connection.
• Redundancy Linking: For dual-controller tracking setups, configure the adjacent twin unit and interconnect them using the required NT 031 redundancy link cable before completing the initialization sequence.
• Airflow Optimization: Keep a minimum 50 mm clearance gap clear above and beneath the external heat-sink surfaces to facilitate ventilation and prevent heat build-up inside the enclosure.
• Firmware Initialization: When applying firmware adjustments or updates locally via a USB-Stick, verify that the storage medium is correctly formatted and that power supply lines are fully stable throughout the installation loop.

Compliance and Certifications