What are the core models of Yokogawa NFA series modules that support HART communication?

What are the core models of Yokogawa NFA series modules that support HART communication?

GENERAL

This GS covers the hardware specifications of analog input/output modules that can be installed in an FCN autonomous controller.

For connection with field equipment, refer to “Field Connection Specifications” (GS 34P02Q30-01E) and “STARDOM FCN/FCJ Installation Guide” (TI 34P02Q91-01E).

Module classification and core parameter summary

Module type represents model, channel quantity, core signal specifications, accuracy, power consumption (5V DC/24V DC), special characteristics

Non isolated current input NFAI141 16 channel (non isolated) input: 4~20mA ± 0.1% full-scale 310mA/450mA overcurrent protection, supports HART, 2/4-wire transmitter switching

Non isolated voltage input NFAV141 16 channel (differential) input: 1-5V (common mode voltage ± 1V) ± 0.1% full-scale 350mA/- input resistance ≥ 1M Ω

Isolation Current I/O (Channel Isolation) NFAI835 4-In/4-Out (Isolation) Input/Output: 4-20mA Input ± 0.1%, Output ± 0.3% 360mA/450mA Channel to Channel Voltage Resistance 500V AC, Supports HART

Isolation voltage output NFAV544 16 channel (isolated) output: -10~+10V ± 0.3% full-scale 860mA/- output fallback function, load resistance ≥ 5k Ω

TC input (isolated) NFAT141 16 channel (isolated) TC (J/K/E, etc.), mV (-100~150) ± 0.03%~± 0.032% full-scale 450mA/- reference compensation, burnout detection

Pulse input (channel isolation) NFAP135 8-channel (isolation) pulse frequency 0~10kHz -300mA/400mA 5 input modes, anti shake filtering

Frequency input (channel isolation) NFAF135 8-channel (isolation) frequency 0.1~10kHz 0.1% reading 300mA/400mA support contact/voltage pulse input

Key Function Description

Power supply requirements

Most modules require 24V DC power supply to the simulated on-site power terminals of the power module.

Transmitter power output: 22.8-26.4V (limited to 27mA) or 24.0-25.5V (limited to 25mA).

Special functional details

Overcurrent protection: NFAI141, NFAI143, NFAI135 and other modules are equipped.

Output fallback: Supports HOLD (hold fault output) or SETV (output specified value), detection time of 4 seconds, set by channel.

HART communication: NFAI141, NFAI841, NFAI143 and other models are supported, please refer to the dedicated document (GS 34P02Q53-01E).

Wire breakage detection: Some current output modules support detection threshold ≤ 0.65mA.

External connections and dimensions

Connection method: pressure clamping terminal, MIL connector cable (such as KMS40 cable).

Module size: uniformly 107.5mm × 32.8mm × 130mm (unit: mm).

Installation and usage restrictions

NFAT141 module special restrictions

To avoid the influence of radiant heat, heating units should not be installed below and should not be directly exposed to airflow.

Do not be adjacent to CPU modules (NFCP501/NFCP502) or power modules (NFPW44x).

It can only be installed adjacent to NFAT141, NFAR181, NFAV141, and NFAV144, and other modules need to have empty slots.

General installation requirements

It is necessary to confirm that the power consumption of the module does not exceed the rated output of the power module (5V DC or 24V DC).

Intrinsically safe applications require the use of isolation barriers and the connection of Zener barriers is prohibited.

Explosion proof selection should refer to the STARDOM FCN/FCJ Installation Guide.

Model coding rules

Meaning of suffix code

Communication functions: - S (standard type), - H (with HART communication).

Explosion proof rating: 5 (non explosion proof), E (explosion proof).

Type options: 0 (basic type), 1 (with ISA standard G3 option), 4 (wide temperature -40~+70 ℃).

Meaning of option codes

/13S00: Equipped with isolated simulated pressure clamping terminal (NFTI3S-00).

/13S10: Isolation analog pressure clamping terminal with surge absorber (NFTI3S-10).

/CCC01: Comes with MIL cable connector sheath (NFCCC01).

LED status indication

LED Name Color Description

When the STATUS green hardware is functioning properly, it lights up

ACT green lights up when executing input/output actions

DX green unused

Key issue

Question 1: What are the core models of NFA series modules that support HART communication? What power supply conditions need to be met?

Answer: The core models that support HART communication include NFAI141, NFAI841, NFAI143, NFAI543, NFAI135, and NFAI835; The power supply conditions are: when in use, a 24V DC power supply needs to be provided to the simulated on-site power terminal of the power module. The module itself consumes 5V DC (230~360mA) and 24V DC (250~540mA) currents. The output range of the transmitter power supply is 22.8-26.4V (limited to 27mA) or 24.0-25.5V (limited to 25mA), and it needs to match the requirements of the module model.

Question 2: What are the installation restrictions for NFAT141 module (TC input)? What are the core measurement accuracy and temperature drift indicators?

Answer: Installation restrictions: ① Avoid radiation heat, there is no heating unit below, and it is not affected by direct airflow; ② Not adjacent to the CPU module or power module; ③ It can only be installed adjacent to NFAT141, NFAR181, NFAV141, and NFAV144, and other modules need to have empty slots; Core parameters: ① Accuracy: thermocouple input ± 0.03% full range (-20~80mV), mV input ± 0.032% full range (-100~150mV); ② Temperature drift: thermocouple input Max ± 30ppm/° C, mV input Max ± 32ppm/° C.

Question 3: What is the output fallback function of NFA series modules? Which modules support this feature? How to configure?

Answer: The output fallback function is an output protection mechanism for the module when a fault is detected, which is divided into two modes: HOLD (maintain the output value when the fault occurs) and SETV (output specified value); The supporting modules include NFAI841, NFAB841, NFAI543, NFAV544, and NFAI835; Configuration method: ① First, select whether to enable fallback (Yes/No) for the module; ② Enable channel setting mode (HOLD/SETV); ③ The fault detection time is uniformly 4 seconds.