YOKOGAWA AAI143-S00 Analog Input Module

Product Overview

The YOKOGAWA AAI143‑S00 is an isolated analog input module of the FIO series, compatible with the CENTUM VP DCS control system. It mainly acquires field 4‑20 mA DC current signals and supports connection to 2‑wire and 4‑wire transmitters. Featuring module‑level electrical isolation, the AAI143‑S00 provides 16 input channels and supports dual‑redundant configuration. It is installed on ESB, optical ESB bus node units and FIO field control units, converting field analog signals into internal digital data recognizable by the FCS to collect process parameters such as pressure, flow and liquid level in industrial processes. The suffix‑S of AAI143‑S00 denotes the standard model, and‑0 represents the basic version. The AAI143‑H00 module with‑H suffix in the same series supports HART digital communication, while the AAI143‑S00 itself has no HART capability.

Technical Specifications

• Model: AAI143‑S00
• Number of Channels: 16 channels, module‑level isolation
• Input Signal: 4‑20 mA DC
• Maximum Allowable Input Current: 24 mA
• Withstand Voltage Rating: 1500 V AC for 1 minute between input side and system side; reduced to 500 V AC when KS1 dedicated cable is used
• Input Impedance at Power‑on: 270 Ω (20 mA) ~ 350 Ω (4 mA)
• Input Impedance at Power‑off: ≥500 kΩ
• Measurement Accuracy: ±16 µA
• Data Refresh Cycle: 10 ms
• Transmitter Power Supply Output: ≥19.0 V under 20 mA condition; ≤25.5 V under 0 mA condition, output current limit 25 mA
• Temperature Drift: ±16 µA/10℃
• Power Consumption: 5 V DC: 230 mA; 24 V DC: 540 mA
• Weight: 0.3 kg
• Installation Bus: ESB bus, optical ESB bus node unit, FIO field control unit; ER bus node unit is not supported
• HART Function: Not supported
• External Connection: Compression terminal, MIL connector cable, KS1 dedicated cable

• Redundancy Mode: Supports dual redundancy; two identical modules are installed in adjacent odd‑even slots for redundant switching

Core Advantages

• Module‑level electrical isolation blocks ground‑loop interference, ensuring stable signals in industrial sites with strong electromagnetic interference and preventing on‑site faults from damaging circuitries on the FCS controller side.
• High‑density acquisition with 16 channels. A single AAI143‑S00 accepts 16‑channel 4‑20 mA signals, reducing the number of modules in cabinets and saving cabinet installation space.
• Supports dual‑redundant operation. When deployed in pairs for redundant architecture, single‑module failure will not interrupt process acquisition loops, improving the availability of the overall DCS system and suiting continuous non‑stop production processes.
• Transmitter loop power supply capability. Each channel can switch between 2‑wire and 4‑wire transmitter modes via independent jumpers, directly powering field 2‑wire instruments and eliminating extra on‑site power wiring.
• Fast signal refresh with a 10 ms data update cycle and 100 ms step response, meeting real‑time acquisition requirements for most process industries.

Product Features

The AAI143‑S00 belongs to YOKOGAWA FIO‑series analog I/O modules. It measures 130 mm×107.5 mm×32.8 mm, fits standard FIO slot dimensions and supports hot‑swap maintenance, so replacement can be performed without system shutdown. Each channel is configured for 2‑wire or 4‑wire transmitter mode via onboard DIP jumpers, and power‑supply mode cannot be switched through software configuration.

Withstand voltage performance varies with matching cables. When self‑made MIL cables are adopted, withstand voltage depends on the cable’s own electrical parameters. The KS1 dedicated matching cable only provides 500 V AC withstand voltage, which shall be noted during model selection and construction.

The AAI143‑S00 is strictly prohibited from being connected in series with Zener safety barriers. For intrinsically safe explosion‑proof scenarios, isolated safety barriers must be used for explosion‑proof isolation instead of Zener barriers.

Application Fields

Process‑industry DCS projects including petrochemical, coal chemical, thermal power generation, water treatment, metallurgy and paper‑making. It collects 4‑20 mA analog signals output by pressure, flow and level transmitters to realize process variable monitoring, and is suitable for production facilities with heavy interference and high requirements for continuous system operation. The AAI143‑S00 is mostly used for ordinary analog acquisition points. Select the AAI143‑H‑series module if HART smart instrument diagnosis and reading are required.

Same‑brand Products Comparison

• AAI143‑S00: Module‑level isolation,16 AI,No HART,Basic isolated 4‑20 mA input, cost‑effective
• AAI143‑H00: Module‑level isolation,16 AI,With HART,Upgraded version of AAI143‑S00 with HART communication
• AAI141‑S00: Non‑isolated,16 AI,No HART,No isolation, low cost, for low‑interference scenarios
• AAI135‑S00: Channel‑to‑channel isolation,8 AI,No HART,8 channels with mutual channel isolation, complete fault independence

• AAV144‑S00: Module‑level isolation,16 AI,No HART,Isolated voltage input module for 1‑5V /‑10~+10V signals

Related Matching Products

• Terminal Blocks & Adapters & Cables: ATA4S‑00, ATA4S‑10, ATA4D‑00, ATA4D‑10, ATK4A‑00, ACCC01, AEA4D
• Compatible Hardware Units: ANB10S, ANB10D, ANB11S, ANB11D, AFV30S/D, AFV40S/D, AFF50S/D
• Engineering Software: LHS5100 / LHMS5100 standard Builder configuration tool

FAQ

Notes

• When the KS1 dedicated cable is used with AAI143‑S00, input‑to‑system withstand voltage drops to 500 V AC. Corresponding withstand‑voltage specifications for selected cables shall be considered in engineering design.
• 2‑wire / 4‑wire transmitters require hardware DIP‑jumper setting for each channel; power‑supply mode cannot be modified via software.
• Dual‑redundant terminal bases must be adopted for redundant configuration; ordinary single‑channel terminal bases cannot be mixed‑used.
• Zener safety barriers are forbidden for intrinsically safe explosion‑proof loops; only isolated safety barriers are permitted.
• Route analog signal cables separately from high‑power power cables during installation to mitigate external electromagnetic interference.
• The module supports hot‑swap. Avoid plug‑and‑swap operations on critical acquisition loops vulnerable to process disturbance.

Product Tags

YOKOGAWA AAI143‑S00, AAI143‑S00, AAI143, Yokogawa FIO module, Analog Input Module, DCS Card, 4‑20 mA Isolated AI Module, Yokogawa FIO‑series Module, CENTUM VP I/O Module, 16‑channel isolated analog input module