NFAR181-S00 Yokogawa RTD Input Module

NFAR181-S00 Yokogawa RTD 4-Channel Input Module

NFAR181-S00 Yokogawa RTD 4-Channel Input Module

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Yokogawa NFAR181-S00 RTD Input Module The Yokogawa NFAR181-S00, also cataloged as the NFAR181 RTD Input Module, operates as a dedicated...

رمز المنتج: NFAR181-S00

Manufacturer: Yokogawa
Product No.: NFAR181-S00
Product Type: RTD Input Modules
Product Origin: JAPAN
Payment:T/T, Western Union
Weight: 450g
Shipping port: Xiamen
Warranty: 12 months

وصف التقييمات

Yokogawa NFAR181-S00 RTD Input Module

The Yokogawa NFAR181-S00, also cataloged as the NFAR181 RTD Input Module, operates as a dedicated hardware component for temperature signal acquisition from Resistance Temperature Detectors (RTD) within CENTUM VP Distributed Control System platforms.

Hardware Specifications

Parameter	Specification
Model	NFAR181-S00
Brand	Yokogawa
Origin	Japan
Weight	0.1 kg (Module weight) / Shipping: 0.35 to 0.45 kg
Dimensions	2.2 x 12.4 x 12.6 cm
Operating Temp	-20 deg C to +70 deg C
Power Consumption	24 V DC (via backplane)
Input Channels	4 channels
Resolution	16-bit
Mounting Type	DIN rail mount (within standard FIO rack slot)
Isolation	1500 V AC withstand voltage (input-to-system)
Environmental Rating	ISA G3 corrosion resistance
Style	Style S2
Certifications	CE, UL, SIL2 compliance

DCS Process Control & Instrumentation Attributes

The NFAR181-S00 utilizes high-resolution 16-bit analog-to-digital converters to translate continuous resistance changes from physical RTD sensors into digital temperature variables. The module hardware employs channel-to-channel isolation and 1500 V AC input-to-system galvanic barriers to suppress ground loop current spikes and high-frequency common-mode noise. For precise measurement execution, the analog front-end supports automatic lead-wire resistance compensation for 3-wire or 4-wire RTD configurations, offsetting measurement errors caused by signal cable run lengths without requiring software-based correction matrices.

Frequently Asked Questions

Q: What are the electrical implications of the "S00" suffix on this module?

A: Suffix "S00" specifies the standard physical version containing no intrinsic explosion protection circuits. When deploying RTD sensors in explosive or hazardous atmospheres, external intrinsic safety barriers must be placed between the field sensors and the NFAR181-S00 input channels.

Q: How does the module handle a broken RTD wire or open sensor condition?

A: The module contains hardware-level burnout detection circuitry. If an open circuit or wire break is detected on any of the 4 channels, the input channel state shifts to an overscale or underscale alarm limit depending on configuration, transmitting a dedicated error flag to the system controller.

Q: Does this module require external loop power for RTD sensors?

A: No. The NFAR181-S00 generates its own stable constant current source to feed the RTD elements, measuring the resulting voltage drop to determine temperature variations.

Field Installation Guidelines

Mounting Method: Slide the module into its designated slot within the FIO node rack. Ensure both top and bottom locking ears snap onto the frame to provide a stable connection to the system backplane.
Shielding Protocol: Route all RTD signal lines in individual shielded twisted pairs. Terminate the overall shielding braids at the cabinet instrument ground bar, maintaining absolute isolation from high-voltage AC cabling.
Lead-Wire Resistance Balance: For 3-wire and 4-wire RTD hookups, ensure all copper conductor lengths and wire gauges are identical to allow the internal compensation circuitry to balance the line resistance.
Operating Environment: Install inside a sealed, temperature-controlled enclosure to verify the ambient temperature does not exceed the 70 deg C operating threshold.

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