Description

ABB DSCS131 57310001‑LM MasterFieldbus Communication Unit Product Description

Technical Specifications

• Product Model: DSCS131 57310001‑LM
• Brand: ABB
• Warranty: One Year
• Input Voltage: 24 VDC ±10%
• Operating Temperature: -20°C to +60°C
• Storage Temperature: -40°C to +85°C (non‑condensing)
• Response Time: Determined by bus load, typical <12 ms cycle update
• Protection Class: IP20 (chassis slot‑mount installation)
• Accuracy Class: Industrial‑grade fieldbus signal processing
• Output Frequency: MasterFieldbus native communication cycle
• Rated Current Range: Max 100 mA, power consumption ≤2.4 W
• Communication Interface: Redundant MasterFieldbus backplane interface
• Supported Protocols: ABB MasterFieldbus proprietary protocol
• Overload Capacity: Built‑in bus surge suppression, galvanic isolation between fieldbus and controller backplane
• Dimensions: 321.3 mm × 228.6 mm ×19.8 mmABB Group

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Product Overview

The DSCS131 57310001‑LM is a redundant MasterFieldbus communication unit built for ABB Advant Master / Advant OCS legacy DCS platforms. This board acts as the master bus controller, managing bidirectional real‑time data traffic between the main DCS controller and distributed fieldbus‑connected I/O nodes. It resolves common legacy‑system pain points such as single‑point communication failure, bus synchronization drift, and unstable data transmission across distributed control cabinets. The ABB unit delivers redundant bus operation to avoid total communication loss during hardware faults, preserving process availability for safety‑relevant loops. It targets plant maintenance engineers, system integrators, and operators conducting spare‑part replacement, system expansion or life‑cycle extension for installed ABB Advant DCS assets.

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Key Functions

Redundant MasterFieldbus Bus Control

This ABB communication unit runs as the master node for the MasterFieldbus network, supporting dual‑channel redundant bus operation. If one communication channel develops wiring or hardware faults, the secondary path takes over data transfer automatically without process interruption. This redundancy eliminates single‑point failure risks for distributed I/O communication loops.

Distributed I/O Real‑Time Data Synchronization

The module coordinates cyclic data exchange between the central DCS controller and remote fieldbus I/O units. It handles polling timing, signal framing and data alignment to maintain consistent scan cycles across distributed cabinets. Accurate time alignment prevents mismatched field‑signal values that could trigger false interlock actions.

Galvanic Isolation & Bus Surge Suppression

Integrated isolation circuitry separates the MasterFieldbus wiring from the DCS internal backplane. This blocks ground‑loop interference and transient voltage surges coming from field cabling. It protects the main controller hardware and improves communication stability in electrically noisy industrial control rooms.