NFAI143-H50/A4S0 Yokogawa ProSafe-RS Datasheet & Technical Manual

NFAI143-H50/A4S0 Yokogawa ProSafe-RS Analog Input Module

NFAI143-H50/A4S0 Yokogawa ProSafe-RS Analog Input Module

Availability: 20 left in stock

Yokogawa NFAI143-H50/A4S0 Analog Input Module Configured for high-accuracy analog signal acquisition in ProSafe-RS safety systems, the Yokogawa NFAI143-H50/A4S0 (NFAI143 Analog...

SKU: NFAI143

Manufacturer: Yokogawa
Product No.: NFAI143
Product Type: Analog Input Modules
Product Origin: JAPAN
Payment:T/T, Western Union
Weight: 450g
Shipping port: Xiamen
Warranty: 12 months

Description Reviews

Yokogawa NFAI143-H50/A4S0 Analog Input Module

Configured for high-accuracy analog signal acquisition in ProSafe-RS safety systems, the Yokogawa NFAI143-H50/A4S0 (NFAI143 Analog Input Module) provides direct physical/electrical execution.

Hardware Specifications

Parameter	Specification
Model	NFAI143-H50/A4S0
Brand	Yokogawa
Origin	Japan
Weight	0.3 kg (Net), 0.45 kg (Shipping)
Dimensions	Standard rack-mounted module enclosure
Operating Temp	-20 to +60 deg C
Power Consumption	230 mA @ 5 VDC, 540 mA @ 24 VDC
Number of Channels	16 isolated input channels
Input Signal Range	4 to 20 mA DC (allowable up to 24 mA)
Resolution	16-bit A/D conversion
Accuracy	+/-0.1% of span
Data Update Cycle	10 ms
Isolation	1500 V RMS channel-to-backplane
Safety Integrity Level	SIL2 / SIL3 (IEC 61508 Certified)

Process Control and DCS Connectivity

The NFAI143-H50/A4S0 module processes 16 isolated current channels from field transmitters into digital safety signals. Internal optical isolation rated at 1500 V RMS prevents ground loops and electrical noise from interfering with system backplane communications. Designed for process interface architectures, the hardware supports 4-20 mA HART loop protocol signaling alongside integrated cold junction compensation (CJC) logic, ensuring high conversion precision and real-time open-wire fault detection across critical control loops.

Frequently Asked Questions

Q: What signal types does the NFAI143-H50/A4S0 module support on its input channels?

A: The module accepts standard 4 to 20 mA DC current signals from field transmitters, with an allowable maximum input current of 24 mA DC.

Q: How does the module maintain system isolation during electrical surge events?

A: Integrated channel-to-backplane galvanic isolation withstands up to 1500 V AC for 1 minute, preventing field-side transients from entering the backplane bus.

Field Installation Guidelines

Insert the NFAI143-H50/A4S0 module vertically into the designated backplane slot of the ProSafe-RS node unit until the locking mechanisms click into place. Tighten the top and bottom retaining screws to establish chassis grounding and mechanical retention. Connect the field wiring arm to the front terminal block, ensuring shielded twisted-pair cables are terminated at the cabinet earth bus to minimize noise pickup. Maintain clear vertical airflow paths above and below the rack to keep operating temperatures within the specified -20 to +60 deg C range.

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