Product Short Description
Product Introduction
The ABB TU846 is a redundant Module Termination Unit purpose-built for the ABB S800 I/O system and Advant 800xA DCS platform. It is designed exclusively for redundant configurations of the CI840/CI840A field communication interface and redundant I/O modules. As a passive interface component, it provides dual power, dual ModuleBus, and dual PROFIBUS connections, enabling fault-tolerant communication between field devices and the control system. It supports vertical DIN‑rail mounting and integrates mechanical keying to ensure correct module installation, making it a core component for high‑availability industrial automation systems.
Description
Technical Specifications
- Part Number: 3BSE022460R1
- Type: Redundant Module Termination Unit (MTU) for CI840/CI840A
- Mounting: Vertical DIN‑rail mounting with latching mechanism
- Power Supply: 24 V DC redundant power input
- Communication Interfaces:
- Dual electrical ModuleBus connections (A/B)
- Dual PROFIBUS DP/DPV1 ports (A/B)
- Dual service tool connections
- Optical ModuleBus port support via TB846 adapter (for TB842)
- Addressing: Two rotary switches for station address setting (0–99)
- Mechanical Keying: Four mechanical keys (two per position), six positions each → 36 configurations
- ModuleBus Length: Max. 2.5 meters from TU846 to terminator
- Dimensions: 47 mm (W) × 186 mm (H) × 124 mm (D)
- Weight: Approx. 0.5 kg
- Operating Temperature: -25°C to +60°C
- Humidity: 5%–95% non‑condensing
- Certifications: CE marked
- Compatible Modules: CI840, CI840A, redundant S800 I/O modules (AI, AO, DI, DO, etc.)
Key Features
- Full Redundancy Support: Dual power, dual ModuleBus, and dual PROFIBUS paths eliminate single points of failure for CI840 and redundant I/O.
- Mechanical Keying System: Prevents incorrect module insertion; configurable via screwdriver for 36 module‑type setups.
- Dual Station Addressing: Two rotary switches enable independent address configuration for redundant paths.
- Optical ModuleBus Compatibility: Supports fiber‑optic ModuleBus extension via TB846 adapter and TB842 module.
- Secure DIN‑Rail Installation: Latching device ensures stable mounting and reliable grounding.
- Passive Design: No active electronics, minimizing maintenance and failure points.
- Space‑Optimized Vertical Mount: Reduces cabinet footprint compared to horizontal mounting.
- Easy Wiring & Service: Clearly labeled terminals and accessible connections simplify installation and troubleshooting.
- Hot‑Swap Compatibility: Supports module replacement without full system shutdown (when configured properly).
Application Scenarios
- Process Automation & DCS: Critical role in ABB Advant 800xA and AC800M systems for oil & gas, refining, chemical, and pharmaceutical plants requiring redundant PROFIBUS communication.
- Power Generation & Distribution: Used in turbine control, boiler management, and grid automation for reliable I/O termination in power plants.
- Water & Wastewater: Deployed in SCADA and process control for water treatment facilities, ensuring continuous operation of pumps, valves, and monitoring instruments.
- Manufacturing & Heavy Industry: Integrated into automotive, metal, and machinery production lines for high‑availability signal termination in PLC‑based control systems.
- Marine & Offshore: Suitable for shipboard and offshore platforms where redundancy and durability in harsh environments are mandatory.
- Industrial Infrastructure: Applied in intelligent building management, fire safety systems, and critical infrastructure control requiring uninterrupted communication.
Reviews
There are no reviews yet.