NFAI143-H50/A4S00 Yokogawa Analog Input Module

Analog Input Module | Yokogawa NFAI143-H50/A4S00

Analog Input Module | Yokogawa NFAI143-H50/A4S00

Availability: 10 left in stock

Yokogawa NFAI143-H50/A4S00 Analog Input Module Configured for precise analog telemetry acquisition in CENTUM VP Field Control Units, the Yokogawa NFAI143-H50/A4S00...

SKU: NFAI143-H50/A4S00

Manufacturer: Yokogawa
Product No.: NFAI143-H50/A4S00
Product Type: Analog Input Modules
Product Origin: JAPAN
Payment:T/T, Western Union
Weight: 250g
Shipping port: Xiamen
Warranty: 12 months

Description Reviews

Yokogawa NFAI143-H50/A4S00 Analog Input Module

Configured for precise analog telemetry acquisition in CENTUM VP Field Control Units, the Yokogawa NFAI143-H50/A4S00 (NFAI143 Analog Input Module) provides direct physical/electrical execution across process control networks.

Suffix Breakdown & Model Matrix

The complete catalog code NFAI143-H50/A4S00 identifies a specific hardware configuration within Yokogawa FIO module options:

NFAI143: Base model code for 16-channel, isolated 4-20 mA / 1-5 VDC analog input module.
-H: HART communication protocol pass-through support.
5: Standard type without explosion protection.
0: Basic logic structure.
/A4S00: Suffix combination specifying dual-redundant terminal board interface layout with standard paint coating.

Hardware Specifications

Parameter	Specification
Model	NFAI143-H50/A4S00
Brand	Yokogawa
Origin	Japan
Weight	0.25 kg
Dimensions	120 x 28 x 90 mm
Operating Temp	-20 to +55 deg C
Power Consumption	~6 W (draws from 24 VDC system rail)
Input Channels	16 isolated channels
Signal Range	4-20 mA DC, 1-5 V DC, +/-10 V DC
Converter Resolution	16-bit A/D conversion
Transmitter Power	24.0 to 25.5 VDC loop power (25 mA current limit per channel)
Galvanic Isolation	1500 VAC for 1 min (channel-to-system and channel-to-channel)

DCS Process Control & Transmitter Loop Interfaces

The NFAI143-H50/A4S00 acquires current telemetry loops from both 2-wire and 4-wire field transmitters, converting continuous process signals through a 16-bit A/D converter matrix. Integrated HART protocol routines transparently pass secondary field variables and diagnostic data to central controllers without interrupting primary control scans. Channel-to-channel isolation prevents localized field ground loops from compromising neighboring measurement circuits. Furthermore, individual channel driver circuits execute automatic cold junction compensation (CJC) scaling routines for temperature measurement loops, eliminating ambient thermal drift across external field wiring junction points.

Frequently Asked Questions

Q: Does removing external transmitter loop power interrupt communication across the internal backplane?

A: Internal logic uses galvanically isolated power barriers; losing field transmitter power or opening a field loop affects only that specific channel, keeping backplane data transfers active.

Q: How does the module react to a short-circuit condition on a 2-wire field loop?

A: Each channel incorporates an active current limiting circuit that caps output to 25 mA, preventing internal component thermal damage and isolating the field fault.

Q: Can maintenance personnel hot-swap the NFAI143-H50/A4S00 in redundant baseplate setups?

A: Maintenance technicians can safely extract and replace the module during active system operation when installed in a dual-redundant module pair without disrupting process control cycles.

Field Installation Guidelines

Seat the module vertically into the designated FIO node unit slot until the top and bottom locking latches click firmly into place.
Terminate incoming 4-20 mA field conductors to the designated pressure clamp terminal block, ensuring 2-wire loops connect to the integrated 24 VDC transmitter power terminals.
Connect the individual twisted-pair shield drain wires to the system functional grounding bar rather than the module frame chassis.
Maintain a minimum distance of 100 mm between low-level analog input wiring and AC power distribution cables within cabinet wire raceways.
Verify cabinet convection fan operation to ensure ambient air temperatures surrounding the card rack stay within the -20 to +55 deg C operational limit.

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