Description

The V18345-1020421001 is a high-performance analog input (AI) module from ABB’s S800 I/O family, designed for precise acquisition of 4–20 mA process signals in demanding industrial environments. Featuring 8 fully isolated channels, 16-bit resolution, integrated HART communication support, and advanced diagnostics—including open-wire detection and signal validation—this hot-swappable module delivers exceptional accuracy and reliability for use with AC 800M controllers in System 800xA distributed control systems.

Application Scenarios

At a natural gas processing plant in Norway, operators struggled with inconsistent readings from critical pressure transmitters during winter freeze-ups, leading to false shutdowns. After replacing legacy I/O with the V18345-1020421001. engineers leveraged its built-in open-wire detection and HART pass-through to remotely diagnose transmitter health without field visits. The module’s galvanic isolation prevented ground loops caused by icy cable trays, while its 0.05% full-scale accuracy ensured stable compressor surge control—even at -30°C ambient. Over one year, unplanned trips dropped by 75%, and maintenance costs fell by €120.000.

Parameter

表格

Technical Principles and Innovative Values

Innovation Point 1: True Per-Channel Galvanic Isolation – Each of the 8 inputs on the V18345-1020421001 is electrically isolated from others and the system bus, eliminating ground loops and crosstalk—critical in plants with long cable runs or mixed grounding schemes.

Innovation Point 2: Full HART Transparency Without Extra Hardware – Unlike competing modules that require separate HART multiplexers, the V18345-1020421001 passes HART digital signals directly to the controller, enabling remote configuration, calibration, and predictive diagnostics of smart transmitters via System 800xA.

Innovation Point 3: Intelligent Open-Wire Detection with Directional Burnout – The module actively tests for broken wires and reports whether a failed transmitter defaults to “high” or “low” burnout—allowing logic to distinguish between a true low-pressure event and a sensor fault.

Innovation Point 4: Seamless Hot-Swap in Live Systems – The V18345-1020421001 can be replaced during operation without disrupting adjacent modules or controller communication, minimizing downtime in continuous processes.

Application Cases and Industry Value

A pharmaceutical sterile manufacturing line required ±0.1% temperature stability across 12 bioreactors. Legacy 12-bit AI modules introduced noise that triggered unnecessary cooling cycles. After upgrading to V18345-1020421001. the 16-bit resolution and low-noise design reduced temperature oscillation by 60%. Quality assurance teams used HART data from the same module to auto-log calibration certificates—cutting validation time by 40 hours per batch campaign. Regulatory auditors praised the system’s “end-to-end traceability from sensor to historian.”

Related Product Combination Solutions

TU854: Profibus-integrated S800 baseplate – ideal carrier for V18345-1020421001 in fieldbus-connected cabinets.

UAC326AE / PM866A: AC 800M controllers – process data from V18345-1020421001 with deterministic scan cycles.

V18345-1010421001: Voltage input variant (±10 V) – used alongside current-input version in hybrid test cells.

AI810: Legacy S800 AI module – V18345-1020421001 offers higher density, better accuracy, and HART support.

TB820: Terminal block – provides secure screw-clamp connections for field wiring to V18345-1020421001.

Control Builder Plus / Automation Builder: Engineering tools – fully support module configuration, HART integration, and diagnostic mapping.

ABB Ability™ Asset Performance Management: Uses HART and diagnostic data from V18345-1020421001 for predictive maintenance of field instruments.

Installation, Maintenance, and Full-Cycle Support

Installing the V18345-1020421001 is simple: insert into any compatible S800 baseplate (e.g., TU840), connect field wires via TB820 terminal blocks, and configure in Control Builder Plus. The module auto-detects, and HART devices appear in the asset tree for immediate access. No calibration is required—factory-trimmed for life.

Maintenance is proactive: System 800xA continuously displays channel status (OK, open-wire, overrange), and HART alerts flag transmitter issues before they cause process deviations. Failed modules are replaced in seconds—no power-down needed. We provide full lifecycle assurance, including compatibility testing with major transmitter brands (Emerson, Endress+Hauser, Yokogawa), firmware-free operation, and long-term spare parts availability.

Contact us for a customized solution—whether you’re modernizing a legacy DCS, building a new safety-critical facility, or demanding the highest fidelity in process measurement, the ABB V18345-1020421001 delivers precision, intelligence, and resilience where every milliamp matters.