UNS2881B-PV1 3BHE009319R0001
UNS2881B-PV1 3BHE009319R0001
UNS2881B-PV1 3BHE009319R0001

ABB UNS2881B-PV1 3BHE009319R0001 | Advant Master DCS Serial/Fieldbus Adapter

  • Brand: ABB
  • Model: UNS2881B-PV1 3BHE009319R0001
  • Product Type: Communication Interface Module
  • Series: Advant OCS (Open Control System)
  • Core Function: Provides serial/fieldbus communication interface for Advant OCS, enabling data exchange between controllers and field devices.
  • Key Specs: Supports multiple protocols (e.g., RS-485, PROFIBUS PA); includes signal conditioning and isolation.
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Part number: ABB UNS2881B-PV1 3BHE009319R0001
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Description

UNS2881B-PV1 3BHE009319R0001: Product Overview
This component is a communication interface module designed for integration within ABB’s Advant Open Control System (OCS), a distributed control system (DCS) architecture. Its position in an automation system is to act as a decentralized node, typically mounted in an Advant I/O station located near process equipment. It bridges the gap between the central controller (e.g., Advant Master) and field devices, handling protocol conversion, signal conditioning, and electrical isolation to ensure reliable data transmission in electrically noisy industrial environments.
The core functionality involves acquiring process signals (e.g., 4-20mA analog, digital contacts) from field instruments, converting them to digital format, and transmitting data to the central DCS via the Advant fieldbus. It supports multiple communication protocols, including RS-485 and PROFIBUS PA, and performs error checking, signal filtering, and galvanic isolation (500Vrms) to protect the control system from ground loops and transient surges. The module also executes simple local logic (e.g., interlocks) to reduce central controller load.
This module belongs to the Advant OCS product family, a platform recognized for its modularity, scalability, and adherence to open standards. Benefits include reduced field wiring through distributed I/O, simplified system expansion via plug-and-play modules, and a unified engineering environment (Control Builder) that streamlines configuration and maintenance. The platform’s distributed architecture minimizes single points of failure, enhancing system availability for continuous process operations.

UNS2881B-PV1 3BHE009319R0001

UNS2881B-PV1 3BHE009319R0001

UNS2881B-PV1 3BHE009319R0001: Technical Specifications
  • Model Number: UNS2881B-PV1 3BHE009319R0001
  • Manufacturer: ABB
  • Product Type: Communication Interface Module
  • System Compatibility: ABB Advant OCS / Advant Master DCS
  • Protocol Support: RS-485, PROFIBUS PA, Modbus RTU (via configuration)
  • Number of Channels: 8x Digital Input, 4x Digital Output, 4x Analog Input (4-20mA)
  • Isolation: 500Vrms channel-to-backplane, 1500Vrms input-to-output
  • Power Supply: 24 V DC (from I/O station backplane)
  • Operating Temperature: 0°C to +55°C
  • Storage Temperature: -40°C to +70°C
  • Dimensions: 45mm (W) x 119mm (H) x 112mm (D)
  • Weight: Approximately 0.4 kg
  • Certifications: CE, UL, ATEX Zone 2 (with approval)
Core Features & Customer Value​
Multi-protocol support enhances integration flexibility. The module’s ability to handle RS-485, PROFIBUS PA, and Modbus RTU allows connection to diverse field devices—from legacy sensors to modern smart instruments—without protocol converters. For engineers, this simplifies system design and avoids additional hardware costs. For end-users, it ensures compatibility with existing infrastructure, protecting prior investments.
Galvanic isolation safeguards system integrity. The 500Vrms isolation barrier prevents ground potential differences and transient voltages (e.g., from inductive loads) from damaging the control system. This reduces nuisance trips, extends controller lifespan, and minimizes troubleshooting time spent diagnosing noise-related faults—critical for maintaining uptime in 24/7 operations.
Local logic execution offloads the central controller. Simple functions like pump interlocks or alarm threshold checks are processed at the I/O station, reducing data traffic to the main DCS. For plant operators, this ensures faster response to field events (e.g., immediate pump shutdown on high pressure) and frees controller capacity for complex control strategies.
Modular design aligns with Advant OCS scalability. The module can be added to or replaced in an existing I/O rack without system overhaul, adapting to evolving process needs. Hot-swappable functionality allows maintenance without shutting down the station, minimizing production loss. For maintenance teams, this reduces downtime and simplifies spare parts management.

UNS2881B-PV1 3BHE009319R0001

UNS2881B-PV1 3BHE009319R0001

Typical Applications​
In a natural gas processing plant, this module is installed in a remote I/O station near a compressor skid. It communicates with HART-enabled pressure transmitters via PROFIBUS PA, executes local logic to trip the compressor on overpressure, and relays data to the central DCS for monitoring.
At a wastewater treatment facility, the module interfaces with dissolved oxygen (DO) sensors and control valves. It converts 4-20mA DO signals to digital values, adjusts valve positions via analog outputs, and logs data for compliance reporting—all while isolating signals from moisture-induced corrosion.
In a pulp mill’s bleaching process, the module connects to chlorine residual analyzers and motor starters. It processes digital inputs from safety interlocks, triggers emergency shutdowns via outputs, and transmits real-time data to the DCS for quality control.

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