ABB DSRF180A
ABB DSRF180A
ABB DSRF180A

ABB DSRF180A | Triconex TMR Safety System Analog Input

  • Brand:​ ABB (formerly Triconex)
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    Model:​ DSRF180A
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    Product Type:​ Analog Input Module
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    Series:​ Triconex Safety Instrumented System
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    Core Function:​ Provides 8 channels of 4-20mA analog input signal conditioning with Triple Modular Redundant (TMR) architecture for safety applications.
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    Key Specs:​ 8 channels, 4-20mA input, TMR design, high reliability.
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Part number: ABB DSRF180A
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Description

DSRF180A: Product Overview
The DSRF180A is an 8-channel analog input module designed for ABB’s Triconex Safety Instrumented System (SIS) platform. This module serves as the interface between field instrumentation and the triple modular redundant (TMR) safety controller in critical process applications. Installed in a Triconex chassis, its primary function is to accept 4-20mA signals from field transmitters measuring critical process variables such as pressure, temperature, level, and flow, converting these analog signals into digital values for processing by the TMR system.
The module incorporates three independent input circuits per channel that are constantly compared by the main processor to detect discrepancies. This TMR architecture ensures that no single point of failure can compromise the safety function, making it suitable for Safety Integrity Level (SIL) 3 applications as defined by international standards IEC 61508 and IEC 61511. The module’s design focuses on providing high reliability and diagnostic coverage for critical process safety applications.

ABB DSRF180A

ABB DSRF180A

DSRF180A: Technical Specifications
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    Model Number:​ DSRF180A
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    Manufacturer:​ ABB (Triconex)
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    Product Type:​ 8-Channel Analog Input Module
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    Input Channels:​ 8 channels
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    Input Signal:​ 4-20mA
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    Architecture:​ Triple Modular Redundant (TMR)
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    Resolution:​ 16-bit
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    Accuracy:​ ±0.1% of full scale
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    Update Time:​ 100 ms per channel
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    Isolation:​ Channel-to-channel and channel-to-system isolation
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    Power Supply:​ 5VDC from Triconex backplane
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    Operating Temperature:​ 0°C to 60°C
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    Safety Certification:​ SIL 3 capable (IEC 61508)

    ABB DSRF180A

    ABB DSRF180A

Core Features & Customer Value
The Triple Modular Redundant architecture provides the highest level of safety and availability for critical process applications. Each channel contains three independent input circuits that are voted on by the main processor. This design allows the system to continue operation even if one circuit fails, while immediately alerting operators to the need for maintenance. For safety engineers, this means achieving the required Safety Integrity Level (SIL 3) for the most demanding applications while maintaining process availability.
The module’s comprehensive diagnostic capabilities include continuous monitoring of circuit health, open wire detection, and out-of-range signal detection. These diagnostics provide early warning of potential failures, allowing for planned maintenance rather than emergency shutdowns. The high channel density (8 channels per module) optimizes cabinet space while maintaining complete channel-to-channel isolation, preventing fault propagation between channels.
Hot-swappable capability allows for module replacement without system shutdown, significantly reducing maintenance downtime. The module’s robust design ensures reliable operation in harsh industrial environments, with built-in protection against power surges and electrical noise.
Typical Applications
In refinery and petrochemical applications, the DSRF180A is used in Emergency Shutdown Systems (ESD) to monitor critical process variables such as reactor pressures, furnace temperatures, and compressor discharge conditions. The TMR architecture ensures that safety functions remain operational even with a component failure.
In power generation facilities, particularly in turbine control and burner management systems, this module provides reliable monitoring of safety-critical parameters. The high reliability and diagnostic capabilities support the continuous operation requirements of these applications while maintaining the necessary safety integrity.

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