Rosemount 3051CD2A02A1AH2B7M5K5L4D4Q4 Differential Pressure Transmitter Unit

Module Feature

3051CD2A02A1AH2B7M5K5L4D4Q4 belongs to Rosemount 3051C coplanar‑platform differential pressure transmitter. It uses high‑precision capacitive sensor module, supports 4‑20 mA analog output superimposed with HART digital communication signal. It features wide turndown ratio, long‑term stability, built‑in impulse‑line blockage diagnostic function. The coplanar structure allows direct assembly with manifold valve block, simplifies field installation. Multiple process connection options and hazardous‑area certifications are available. Widely applied for differential pressure, flow calculation and liquid‑level measurement in petrochemical, power plant, water treatment and refining industry.

Working principle

Process pressure from high‑side and low‑side ports acts on the capacitive sensing diaphragm. The diaphragm deflection changes capacitance value proportionally to differential pressure. Internal electronic circuit converts capacitance variation into standard 4‑20 mA analog signal, meanwhile HART protocol transmits digital measurement, status and diagnostic data over the same two‑wire loop. On‑board temperature compensation reduces measuring deviation caused by ambient and process temperature fluctuation.

Onboard components

Capacitive differential pressure sensor module, electronic main board, HART communication circuit, local LCD display unit, coplanar process connection base, isolating diaphragm, fill fluid, two‑wire terminal block, transmitter housing and sealing gaskets.

LED indicators

No standalone LED indicator. Measurement values, alarm and diagnostic information are shown on local LCD display. Fault status can also be read via HART handheld communicator or DCS system.

Hardware self‑diagnosis

Execute impulse‑line blockage detection, monitor sensor drift, check loop current consistency, inspect power‑supply loop voltage, read internal fault codes via HART, verify diaphragm over‑range alarm status.

Programming software

Configuration supported by Rosemount AMS software or HART hand‑held communicator. Parameters include range setting, damping, unit selection and diagnostic enablement; local keypad also supports on‑site adjustment.

Electrical & Process Parameters

Model:3051CD2A02A1AH2B7M5K5L4D4Q4 Brand:Rosemount Device type:Coplanar Differential Pressure Transmitter Signal Output:4‑20 mA + HART digital protocol Power Supply:Two‑wire loop power supply Function:Differential pressure, flow and liquid‑level measurement for process plant

Mechanical & Structure

Mounting:Coplanar manifold mount / bracket wall mount Protection class:IP66 / NEMA 4X Housing:Aluminum alloy explosion‑proof housing

Environmental

Operating temperature:-40℃ ~ +85℃ Storage temperature:-55℃ ~ +120℃ Ambient humidity:0~100% non‑condensing Certification:Hazardous area compliant, SIL capable, process instrument standard Status: Rosemount original 3051C series differential pressure transmitter

Installation

Mount transmitter on bracket or directly couple with coplanar manifold valve block. Run two‑wire shielded cable for power and signal loop. Complete impulse piping connection and perform pressure‑tightness test. Set measuring range, perform zero‑point trim after installation, verify output signal by HART communicator or host system.

Interface

High‑pressure and low‑pressure coplanar process ports, two‑wire signal terminal compartment, local LCD display and operation keypad, HART digital communication interface.

Diagnostic

Measurement drift: zero‑point drift caused by overpressure, impulse line blockage or process medium crystallization. Incorrect 4‑20 mA output: loop resistance out‑of‑range or wrong range configuration. Communication failure: cable damage, poor terminal contact. Process alarm: impulse line plugged, sensor over‑range warning.

Product Brief

Rosemount 3051CD2A02A1AH2B7M5K5L4D4Q4 coplanar differential pressure transmitter with HART protocol, delivers reliable differential pressure, flow and level measurement for heavy‑duty industrial process conditions.