YOKOGAWA AAI143‑H53

Technical Specifications: 16 input channels, 4‑20 mA DC input signal, support HART protocol, A/D conversion resolution 16‑bit, channel‑to‑system isolation, power supply 24 V DC supplied by node unit, ESB‑bus communication interface.

Functional Features: Wire‑break detection, over‑range input diagnosis, HART burst‑message processing, module‑level redundancy support, per‑channel signal filtering, screw‑type field‑wiring terminals, EMC‑optimized shielding design.

Application Scenarios: Petrochemical plant process‑variable acquisition, oil‑refinery DCS measurement‑signal input, chemical‑factory smart‑transmitter signal collection, power‑plant process monitoring, pulp‑and‑paper industry Centum‑VP system I/O configuration.

Performance Parameters: Basic accuracy ±0.1 % full scale, single‑channel scanning rate minimum 100 ms, operating temperature 0 ℃ ~ +60 ℃, relative humidity 5‑95 % non‑condensing, IP20 protection grade, revision S1 enhanced signal‑filtering performance.

Material Composition: Industrial‑grade flame‑retardant plastic housing, multi‑layer printed circuit board, isolation components, HART demodulation chip, gold‑plated ESB‑bus connector.

Structural Features: Standard node‑unit plug‑in module, front‑side field‑wiring screw terminals, module‑status LED indicator, rear‑edge ESB‑bus back‑plane connector, mechanical locking structure for node chassis.

Working Principle: Field 4‑20 mA analog signal with superimposed HART digital signal enters module channel; analog signal completes isolation and A/D conversion, HART digital signal is demodulated and parsed; converted measurement value and HART instrument diagnostic data are transmitted to DCS control node through ESB bus; receive host command and realize HART instrument parameter access operation.

Installation Requirements: Insert module into corresponding slot of Centum‑VP node unit, lock module fixing mechanism, connect field transmitter shielded cable to front‑side screw terminals, confirm node‑unit 24 V DC power‑supply normal, complete module hardware‑configuration in engineering software.

Usage Notes: Field shielded‑cable shield layer single‑end grounding, HART loop load resistance must satisfy HART specification, do not hot‑plug under non‑redundant power‑on condition, check wire‑break diagnostic alarm in case of abnormal measurement value.