AAI143-S03 Yokogawa Analog Input Module

AAI143-S03 AAI143 Yokogawa 16-Channel FIO Analog Input Card

AAI143-S03 AAI143 Yokogawa 16-Channel FIO Analog Input Card

Availability: 10 left in stock

Yokogawa AAI143-S03 FIO Analog Input Module Configured for high-density analog signal acquisition in CENTUM VP distributed control systems, the Yokogawa...

SKU: AAI143-S03

Manufacturer: Yokogawa
Product No.: AAI143-S03
Product Type: Analog Input Modules
Product Origin: JAPAN
Payment:T/T, Western Union
Weight: 500g
Shipping port: Xiamen
Warranty: 12 months

Description Reviews

Yokogawa AAI143-S03 FIO Analog Input Module

Configured for high-density analog signal acquisition in CENTUM VP distributed control systems, the Yokogawa AAI143-S03 (AAI143 Analog Input Module) provides direct physical/electrical execution.

Hardware Specifications

Parameter	Specification
Model	AAI143-S03 (also referencing NFAI143-S03 / AAI143-S00)
Brand	Yokogawa
Origin	Japan
Weight	0.50 kg
Dimensions	25.1 cm x 7.0 cm x 10.0 cm
Operating Temp	-20 to 70 deg C
Power Consumption	230 mA (at 5 V DC), 540 mA (at 24 V DC)
Number of Channels	16 isolated channels
Signal Type	4-20 mA DC
Input Resistance	250-350 Ohm (Power ON), greater than or equal to 500 kOhm (Power OFF)
Accuracy	Plus or minus 16 uA
Temperature Drift	Plus or minus 16 uA per 10 deg C
Data Update Period	10 ms
Isolation	1500 V AC between input and system for 1 minute

4-20 mA HART Loop Protocol and Channel-to-Channel Isolation

This FIO subsystem module integrates 16 isolated channels designed to process standard 4-20 mA current loops from field transmitters. It maintains a 1500 V AC galvanic isolation barrier between the external field wiring and the internal system backplane, preventing common-mode noise and electrical transients from disrupting the processor nodes. The hardware utilizes an internal input resistance of 250 to 350 Ohm during active operation to extract analog signals with a loop precision of plus or minus 16 uA. When configured inside a redundant node, the module continuously monitors channel diagnostics and executes automated hardware switchovers without interrupting active process loops.

Frequently Asked Questions

Q: How does the input impedance behave when the AAI143-S03 module loses power?

A: During active powered operations, the input resistance measures between 250 and 350 Ohm. If a power-down event occurs, the internal circuitry shifts the input impedance to greater than or equal to 500 kOhm, preventing signal loop loading.

Q: Does this module support hot-swap replacement while the node is powered and operating?

A: Yes, if configured in a dual-redundant pair, you can execute a hot-swap on the inactive card without interrupting the signal scanning of the companion module.

Q: What are the limits of the transmitter power supply provided by each channel?

A: The module supplies an isolated transmitter power source between 19.0 and 25.5 V DC, with a hardware current limit set to a maximum of 25 mA per channel to protect against direct short circuits.

Field Installation Guidelines

Shield Grounding: Connect all analog instrument cable shields to the system cabinet's dedicated instrument ground plate, ensuring only a single-ended ground point to prevent ground loop currents.
Corrosive Protection: For deployment in chemical or sulfur-rich environments, seal the enclosure cabinets to maintain the G3 environmental rating and preserve the integrity of the conformal coating.
Wiring Separation: Route the low-voltage field instrument cables and KS1 cables through dedicated wiring ducts, keeping them physically separated from high-voltage AC electrical lines by at least 15 cm.
Terminal Screws Torque: Secure the field wire terminations to the pressure clamp terminal block using a torque-calibrated screwdriver, checking that all connections are secure to eliminate intermittent loop impedance shifts.

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