NFAI143-H50 Yokogawa Centum VP Datasheet & Technical Manual

NFAI143-H50 Yokogawa Centum VP Analog Input Module

NFAI143-H50 Yokogawa Centum VP Analog Input Module

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Yokogawa NFAI143-H50 Field I/O Analog Input Module Configured for 4-20 mA transmitter signal processing in Yokogawa Centum VP platforms, the...

SKU: NFAI143-H50

Manufacturer: Yokogawa
Product No.: NFAI143-H50
Product Type: Analog Input Modules
Product Origin: JAPAN
Payment:T/T, Western Union
Weight: 240g
Shipping port: Xiamen
Warranty: 12 months

Description Reviews

Yokogawa NFAI143-H50 Field I/O Analog Input Module

Configured for 4-20 mA transmitter signal processing in Yokogawa Centum VP platforms, the Yokogawa NFAI143-H50, also cataloged as the NFAI143 Analog Input Module, provides direct physical/electrical execution. It operates within the Field I/O (FIO) subsystem to acquire primary process variables from 2-wire and 4-wire field transmitters across 16 isolated channels.

Suffix Breakdown & Model Matrix

Option Code	Description	Technical Details
NFAI143	Base Model Code	Analog Input Module (16-channel, isolated)
-H	Signal Type / Function	4 to 20 mA current input signal with HART communication support
5	Dual-Redundancy / Standalone	Standard mounting style for single or dual-redundant node deployment
0	Special Specification	Standard tropicalization / Basic specification

Hardware Specifications

Parameter	Specification
Model	NFAI143-H50
Brand	Yokogawa
Origin	Japan
Weight	0.24 kg
Dimensions	32 x 123 x 130 mm
Operating Temp	0 to 55 deg C
Power Consumption	0.4 A at 24 VDC nominal
Number of Channels	16 channels (isolated)
Input Signal	4 to 20 mA DC / 1 to 5 VDC
Allowable Input Current	24 mA DC
Transmitter Power Supply	24.0 to 25.5 VDC (output current limit: 25 mA per channel)
Transmitter Interface	Configurable 2-wire or 4-wire per channel via jumper pins
Measurement Accuracy	±0.1% of full scale
Temperature Drift	Max ±0.01%/deg C
Data Update Cycle	10 ms
Input Step Response Time	100 ms
Isolation Withstand Voltage	1500 VAC for 1 minute (between input channels and system)
Relative Humidity	10 to 90% RH (non-condensing)

HART Communication and Process Isolation Features

The module provides full support for the 4-20 mA HART loop protocol, allowing superimposition of digital diagnostic data onto standard analog signals without interrupting primary process updates. Integrated channel-to-system galvanic isolation rated at 1500 VAC suppresses ground potential differences and prevents high-voltage common-mode electrical noise from entering the FIO backplane. Each channel features short-circuit current limiting set to 25 mA, protecting onboard power distribution circuits when driving field-mounted 2-wire pressure, flow, or level transmitters.

Frequently Asked Questions

Q: How is individual channel selection configured between 2-wire and 4-wire field transmitters?

A: Channel modes are set independently via hardware setting pins located directly on the module circuit assembly, establishing proper internal transmitter loop power delivery or passive signal sensing.

Q: What protection is provided against external current surges on the signal inputs?

A: Every channel features built-in overcurrent protection that clamps inputs above allowable limits, maintaining functional circuit safety up to a maximum continuous current of 24 mA DC.

Q: Can this module be installed into redundant node units under active power?

A: Yes, the module supports hot-swap replacement within dual-redundant FIO node configurations, enabling online module replacement without disturbing adjacent signal channels or interrupting system communication.

Field Installation Guidelines

Verify complete removal of hazardous voltage source lines prior to inserting the NFAI143-H50 into the targeted FIO rack slot. Ensure all channel setting jumpers match the exact field wiring topology (2-wire loop-powered vs. 4-wire self-powered) for every connected instrument. Secure signal line shielding to the dedicated cabinet grounding bus using a single-point termination scheme to avoid ground loop noise. Maintain standard separation distances between low-level analog wiring runs and high-voltage AC lines within cabinet wireways.

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