NFAI143-S50 S1 YOKOGAWA Analog Input Module

YOKOGAWA NFAI143-S50 S1 CENTUM VP Analog Input Module

YOKOGAWA NFAI143-S50 S1 CENTUM VP Analog Input Module

Availability: 20 left in stock

YOKOGAWA NFAI143-S50 S1 Isolated Analog Input Module Configured for direct analog signal acquisition in CENTUM VP, ProSafe-RS, and STARDOM process...

SKU: NFAI143-S50 S1

Manufacturer: Yokogawa
Product No.: NFAI143-S50 S1
Product Type: Analog Input Modules
Product Origin: JAPAN
Payment:T/T, Western Union
Weight: 300g
Shipping port: Xiamen
Warranty: 12 months

Description Reviews

YOKOGAWA NFAI143-S50 S1 Isolated Analog Input Module

Configured for direct analog signal acquisition in CENTUM VP, ProSafe-RS, and STARDOM process control architectures, the YOKOGAWA NFAI143-S50 S1 (NFAI143-S50 Isolated Analog Input Module) provides direct physical/electrical execution. The hardware conditions up to 16 current loop field devices, converting raw inputs into digitally sampled values for real-time automation logic.

Hardware Specifications

Parameter	Specification
Model	NFAI143-S50 S1
Brand	YOKOGAWA
Origin	Japan
Weight	0.3 kg
Dimensions	2.5 x 12.7 x 12.7 cm
Operating Temp	-20 to +70 deg C
Power Consumption	24 VDC external transmitter supply (22.8 to 26.4 VDC operating window)
Input Channels	16 channels, individually isolated
Input Signal Range	4-20 mA DC, 0-20 mA DC (Allowable measurement headroom up to 24 mA DC)
A/D Resolution	16-bit
Measurement Accuracy	+/-0.1% of full scale
Data Refresh Cycle	10 ms
Isolation Rating	Galvanic isolation (channel-to-channel and channel-to-system backplane bus)

Channel Isolation and Cold Junction Compensation

The hardware incorporates dedicated channel-to-channel and channel-to-system galvanic isolation to eliminate ground loops across distributed field wiring networks. Integrated signal processing circuitry manages internal cold junction compensation (CJC) alongside automated linearisation routines for process instrument integration. The onboard transmitter power supply maintains loop voltages between 22.8 VDC and 26.4 VDC with an active current limit threshold capped at 25 mA per channel. Channel circuits feature an internal input impedance of 250 Ohm during energized operation, rising above 500 kOhm upon power disruption to safeguard interconnected loop components.

Frequently Asked Questions

Q: What is the backplane behavior when input signal levels exceed the standard 20 mA loop threshold?

A: The module maintains continuous internal processing and A/D conversion up to 24 mA DC without initiating hardware channel fault trips or clipping data structures.

Q: How does the internal channel impedance change during a total module power failure?

A: Active internal current loop resistance rests at approximately 250 Ohm under normal operating conditions. When system power removes from the unit, the input circuit transitions to a high-impedance state equal to or exceeding 500 kOhm.

Q: Does removing field connections affect the backplane refresh timing for remaining channels?

A: Channel scanning occurs via concurrent conversion hardware, maintaining a consistent 10 ms data refresh cycle and 100 ms step response time across active channels regardless of open-circuit conditions on adjacent terminal blocks.

Field Installation Guidelines

Secure the module onto the designated backplane rack location using the alignment guides, engaging locking mechanisms fully before applying power.
Route all 4-20 mA analog input signal wiring through shielded twisted-pair cables to prevent electromagnetic coupling in harsh industrial environments.
Terminate shield drain wires at the system ground terminal bar while leaving the field instrument end isolated to minimize ground loop potentials.
Ensure pressure clamp terminal connections remain torqued within manufacturer parameters to prevent micro-interruption of low-level DC currents.
Maintain clear ventilation pathways around the enclosure assembly to keep operating temperatures within the specified -20 to +70 deg C thermal envelope.

What's clients say about us

Excellent Emergency Support!

Our production line was down due to a faulty Bently Nevada monitor. We found it in stock here and they shipped it via DHL immediately. Back in operation within 48 hours—truly a lifesaver for our plant.

Mark Thompson

Maintenance Manager, USA

Reliable Source for New Spares

Finding brand new, original modules is critical for our safety. This team delivers factory-fresh components with full certification. Their commitment to only selling new products makes them our most trusted partner.

Robert Hoffmann

Engineering Lead, Germany

Top-tier Service and Quality

We have sourced Honeywell and Schneider parts here for two years. Every shipment arrives well-packaged with original factory seals intact. Clear communication and the best lead times in the industry.