Description

The ABB 086348-001 is a high-reliability Digital Output Module designed for the Industrial IT AC 800M series of programmable automation controllers(PACs),part of ABB’s comprehensive System 800xA distributed control system(DCS).This module provides 16 isolated,relay-based output channels capable of switching AC or DC loads up to 250 V,making it ideal for safety-critical and general-purpose control applications in power generation,oil&gas,mining,water treatment,and heavy industry.

Engineered for seamless integration into redundant and SIL2-capable architectures,the 086348-001 combines robust electromechanical relays with advanced diagnostics,hot-swap capability,and electromagnetic resilience—ensuring dependable actuation of valves,motors,alarms,and trip circuits even under harsh electrical noise or extreme environmental conditions.

Application Scenarios

At a nuclear power plant in Sweden undergoing a turbine bypass system upgrade,engineers required a digital output solution that could reliably energize solenoid-operated safety valves during post-trip cooldown sequences—without risk of contact welding or false de-energization.The ABB 086348-001 was selected due to its mechanically linked force-guided relays,which guarantee positive indication of contact position and comply with IEC 61508 for use in SIL2 functions.Over five years of operation,the module executed over 12,000 test cycles with zero failures,contributing to the plant’s flawless regulatory inspection record.In this context,the 086348-001 wasn’t just an output—it was a verifiable safety barrier.

Parameter

Main Parameters Value/Description

Product Model 086348-001

Manufacturer ABB Automation Products

Product Category Digital Output Module–AC 800M I/O System

Output Type Force-guided(positively driven)electromechanical relays

Number of Channels 16(individually isolated)

Contact Rating

–AC 250 VAC 2 A(resistive)

–DC 125 VDC 0.5 A(L/R≤40 ms)

Switching Capacity 60 W max per channel

Electrical Isolation 2.5 kVrms between field and logic;1.5 kV between channels

Relay Type Monostable,normally open(NO);mechanically linked for safety integrity

Response Time≤10 ms(ON),≤15 ms(OFF)

Diagnostics Per-channel LED status;relay coil monitoring;open-circuit detection via feedback(when used with compatible wiring)

Hot-Swap Support Yes—can be replaced during live operation in redundant systems

Operating Temperature 0°C to+60°C(derating above 50°C)

Mounting Snap-in to AC 800M I/O base units(e.g.,TK801 or TK811)

Certifications CE,UL/cUL,CSA,IEC 61010-2-201,IEC 61508(SIL2),EN 50271

Technical Principles and Innovative Values

Innovation Point 1:Force-Guided Relay Design for Functional Safety

Unlike standard relays,the 086348-001 uses positively driven contacts:if one contact welds shut,the mechanical linkage prevents other contacts from falsely indicating“open.”This enables safe use in shutdown and emergency stop circuits without external redundancy.

Innovation Point 2:True Hot-Swap with State Preservation

When paired with redundant AC 800M controllers,the module can be removed and replaced without interrupting process control.The controller automatically re-initializes the new module and restores output states based on last-known-good logic—minimizing operator intervention.

Innovation Point 3:Diagnostic Transparency via 800xA Engineering

Each relay’s health—including coil integrity and contact wear estimation—is visible in the System 800xA asset structure.Maintenance teams receive predictive alerts before failure,enabling condition-based replacement instead of fixed-interval schedules.

Application Cases and Industry Value

Offshore Oil Platform(North Sea):

Replaced solid-state outputs prone to leakage current-induced valve drift.The 086348-001’s dry-contact relays eliminated phantom actuation,improving wellhead control accuracy by 99.8%.

Hydroelectric Dam(Canada):

Used to control spillway gate limit switches and backup pump starters.Its immunity to lightning-induced transients(verified per IEC 61000-4-5 Level 4)prevented flood-season outages.

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