Product Core Brief

• Model： SE4303T01
• Brand： Emerson DeltaV
• Full Name： AI 4–20 mA HART CHARM (Characterization Module)
• Series： DeltaV CHARM I/O 分布式现场模块化 I/O 系统
• Core Function： Single-channel analog input CHARM module, collects 4–20mA analog signals from temperature, pressure, flow transmitters, fully supports HART 7 protocol. It supplies loop power to 2-wire transmitters, realizes signal conditioning, isolation, self-diagnosis, and transparent HART data transmission to DeltaV controller & AMS asset management software. Adopts hot-swap design, pluggable on CHARM carrier terminal block without powering down the cabinet.
• Product Type： Miniature pluggable single-channel analog input I/O CHARM module
• Key Specs： 4–20mA / 0–20mA signal range; built-in 24V loop power supply; HART v7 pass-through; channel open/short circuit diagnosis; galvanic isolation between field and system bus
• Note: Original OEM spare; must be matched with DeltaV CHARM carrier base for installation; compatible with safe zone cabinets, intrinsically safe variants available for hazardous area.

 

Key Technical Specifications

Electrical Signal Parameters

1. Standard signal span: 4–20mA, optional 0–20mA full range 0–24mA
2. Field transmitter compatibility:
   • 2-wire passive transmitter: 15V supply at 20mA output
   • 3-wire / 4-wire active transmitter direct access
3. HART communication: HART 7 transparent transmission, real-time upload device variable, device diagnostic, calibration data to AMS
4. Measurement accuracy: ±0.1% FS within 0℃ ~ +60℃ operating temperature
5. Channel isolation: Galvanic isolation between field loop and CHARM bus, withstand 500VAC insulation voltage
6. Power consumption per module: 0.33W typical

Mechanical & Mounting

• Form factor: Compact mini plug-in CHARM module, single-channel independent design
• Mounting: Snap onto DeltaV dedicated CHARM carrier terminal block (multiple CHARMs stacked on one carrier)
• Overall dimension: 86mm × 28mm × 16mm; net weight ~0.04kg
• Lock structure: Spring snap lock, support online hot swap without disconnecting field wiring

Environmental & Compliance

• Operating temperature: 0℃ ~ +60℃
• Storage temperature: -40℃ ~ +85℃
• Humidity: 5%–95% RH non-condensing
• Environment grade: ISA S71.04 G3 severe industrial gas environment (refinery, power plant)
• Protection class: IP20 (cabinet internal installation)
• Certifications: CE, UL, RoHS industrial automation standard

 

Product Introduction

is the core analog input module of Emerson DeltaV CHARM distributed I/O architecture, widely used in thermal power, oil & gas, chemical, pharmaceutical, water treatment process control systems.Traditional rack I/O adopts multi-channel fixed card design; CHARM I/O breaks the limit, each corresponds to one field transmitter channel, flexible expansion according to on-site point quantity, no waste of redundant channels.Built-in HART 7 transparent tunnel function: Operators can read transmitter internal temperature, calibration records, sensor fault codes directly through DeltaV workstation or AMS asset management platform, realizing predictive maintenance without on-site handheld HART communicator.Support full-channel self-diagnosis: Automatically detect open circuit, short circuit, over-range signal, low loop voltage, and upload fault alarms to DCS in real time. Hot-swap maintenance greatly reduces production downtime when single channel fails; only replace the faulty without touching other field loops.Typical matching equipment: Pressure transmitter, temperature RTD/TC transmitter, flow differential pressure transmitter, liquid level HART transmitter.

 

QA & Testing SOP

1. Incoming InspectionCheck original Emerson serial label; inspect plastic housing without crack, gold contact pin no oxidation, PCB conformal coating intact.
2. Signal Calibration TestConnect standard 4–20mA signal source, verify full-span measurement accuracy within ±0.1% FS; test HART communication read/write device parameter normally.
3. Fault Diagnosis SimulationSimulate loop open circuit, short circuit, over-range current, confirm DCS workstation pop up corresponding channel fault alarm.
4. Hot Swap Durability Test500 times plug/unplug test on carrier base, ensure no signal loss during switching.
5. Final PackagingIndependent ESD anti-static bag sealed, attached serial number test report with 24-hour continuous operation log.

 

Installation Pitfalls & Replacement Guide

Critical Installation Mistakes To Avoid

❗ Mix AI CHARM with DI/DO CHARM Models is dedicated analog input module; cannot replace digital I/O CHARM (SE4301, SE4302 series), internal circuit power supply and signal processing logic are completely different.❗ Overload 2-Wire Transmitter LoopDo not cascade multiple 2-wire transmitters on one channel; excessive loop load causes insufficient supply voltage, signal drift and HART communication loss.❗ ESD Damage During HandlingMust wear grounded anti-static wristband when plugging/unplugging CHARM; static discharge damages internal A/D conversion chip and HART transceiver circuit.❗ Long Parallel Layout With High-Voltage Power CableSeparate 4–20mA HART signal cables from AC 220V/24VDC power cables with ≥10cm clearance; EMI interference leads to analog value jitter and HART communication timeout.

4-Step Replacement Guide

1. Pre-operation PreparationEnter DeltaV workstation to set bypass interlock for the corresponding measurement loop; no need to cut cabinet 24V power (support hot swap). Photograph field transmitter wiring on carrier terminal block for reference.
2. RemovalPinch the side spring lock of , pull the faulty CHARM straight out horizontally from carrier slot.
3. InstallationAlign the gold contact end of new with carrier slot, push fully until the snap lock clicks locked.
4. Commission VerificationCancel loop bypass; monitor real-time analog value on operator station, read HART device information to confirm stable signal and no fault alarms.

 

FAQ

Q1: What is the advantage of single-channel CHARM compared with traditional multi-channel I/O card?A: Flexible point-by-point expansion, no redundant channel waste; single channel fault only affects one transmitter without impacting other measurement points; hot-swap maintenance without cabinet power-off, lower maintenance cost.

Q2: Does supply power to 2-wire HART transmitters?A: Yes, built-in regulated 24V loop power, output 15V minimum voltage at 20mA current, fully compatible with all standard 2-wire HART transmitters.

Q3: Can this module realize remote HART calibration through DeltaV system?A: Yes, HART 7 transparent tunnel supports remote reading device diagnostics, set range, zero calibration via DeltaV or AMS asset management software.

Q4: What faults indicate damaged CHARM module?A: Fixed full-scale / zero analog value, continuous channel open/short circuit false alarm, HART device offline prompt, severe signal fluctuation under stable process condition.

Q5: What warranty applies to original spare parts?A: Standard 12-month OEM factory warranty covering A/D conversion circuit, HART transceiver and power loop components; damage from ESD mishandling, overvoltage surge, wrong wiring loop overload is excluded from warranty coverage.