Description
YOKOGAWA AAI143‑S00
Technical Specifications: Input‑signal range: 4‑20 mA DC; total channel quantity: 16 channels; channel‑to‑channel galvanic isolation; analog‑to‑digital conversion resolution: 16‑bit; supports over‑range detection and field‑loop open‑wire detection; operating power draws from CENTUM‑VP rack backplane bus; operating temperature: 0 °C‑60 °C; storage temperature:‑20 °C‑70 °C; relative humidity: 10‑90 %RH non‑condensing; FIO rack‑slot mounting; front‑panel LED indicators for RUN status, module fault and channel diagnostic alarms; weight: 0.80 kg.
Functional Features: Sixteen galvanically isolated 4‑20 mA analog‑input channels for field process transmitters; per‑channel open‑loop detection identifies broken field‑transmitter wiring; channel‑wise galvanic isolation blocks ground‑loop interference originating from distributed field‑instrumentation; hardware self‑diagnosis detects internal‑module hardware defects and backplane‑bus communication abnormalities; front‑panel LED status group provides visual RUN and fault indication; transmits digital‑measurement‑data to CENTUM‑VP CPU via rack backplane bus.
Application Scenarios: Chemical‑plant process‑variable signal acquisition from 4‑20 mA field transmitters; petrochemical‑refinery pressure, flow and level‑transmitter‑signal input; oil‑gas‑processing‑plant process‑parameter‑measurement‑point collection; power‑plant auxiliary‑system analog‑signal‑acquisition loops; CENTUM‑VP DCS‑system spare‑part replacement and maintenance projects.
Performance Parameters: Analog‑input‑measurement accuracy satisfies CENTUM‑VP DCS process‑control requirements; channel‑to‑channel isolation dielectric strength complies with process‑control‑industrial standards; vibration and shock resistance meets cabinet‑mount control‑hardware criteria; supports continuous 24‑7 operation inside non‑condensing industrial‑control cabinets.
Material Composition: Orange V0 flame‑retardant engineering‑plastic rack‑module housing; FR‑4 multi‑layer glass‑fiber printed circuit board; high‑precision analog‑to‑digital‑conversion chips; per‑channel galvanic‑isolation components; gold‑plated backplane edge‑connector contacts; multi‑color SMD LED status indicators; metal mechanical locking latches.
Structural Features: Standard CENTUM‑VP FIO rack‑slot physical dimension; rear‑side gold‑plated edge‑connector interfaces with rack backplane bus; front‑panel mounts RUN and fault‑status LED indicators; side metal latches lock module securely into FIO rack I/O slot; all field‑transmitter wiring completes externally through compatible terminal‑block assembly.
Working Principle: Field 4‑20 mA current‑signals from process transmitters travel through matched terminal‑block assembly to AAI143‑S00 input channels. Each‑channel analog‑front‑end converts loop‑current‑signal into corresponding voltage‑value. Galvanic‑isolation circuits separate field‑instrument analog‑domain from module‑internal digital‑logic‑domain. Analog‑to‑digital converter transforms analog‑measurement‑values to 16‑bit digital‑data. Digital‑measurement‑data transmits to CENTUM‑VP CPU over rack backplane‑bus. Onboard‑diagnostic‑logic detects open‑loop‑field‑wiring‑faults and internal‑module‑hardware‑failures, and drives front‑panel LED‑indicators accordingly.
Installation Requirements: Insert AAI143‑S00 into valid I/O slot of CENTUM‑VP FIO main rack or expansion rack; engage side‑mechanical‑latches to complete‑mechanical‑fixation; use matched terminal‑block‑assemblies for all field‑transmitter‑wiring; deploy shielded twisted‑pair cables for 4‑20 mA field‑signal‑transmission; separate analog‑signal‑cables from high‑power‑motor‑and‑inverter‑power‑cables; implement reliable‑protective‑grounding for control‑cabinet‑and‑rack‑assembly.
Usage Notes: Follow official hot‑swap‑operation‑procedures for module‑replacement on powered‑on‑rack; configure input‑signal‑parameters inside CENTUM‑VP‑engineering‑software during‑commissioning; verify field‑transmitter‑loop‑power‑configuration matches‑module‑specification; avoid‑deployment‑in‑environments‑with‑corrosive‑gas,‑liquid‑splash‑or‑condensation; inspect‑terminal‑block‑screw‑tightening‑torque‑during‑periodic‑system‑maintenance‑cycles.
