FLXA21-D-P-D-AA-P1-NN-A-N-LA-N-NN/U Yokogawa

FLXA21-D-P-D-AA-P1-NN-A-N-LA-N-NN/U Yokogawa analog module

Product  Description：

Yokogawa Analog Modules, primarily designed for the CENTUM VP Distributed Control System (DCS) and the FA-M3 Range-free Multi-controller series, are high-precision components used to interface continuous physical variables with the digital processing environment. These modules serve as the vital link between field instruments (such as temperature transmitters, flow meters, and pressure sensors) and the central control system, executing highly accurate analog-to-digital (A/D) and digital-to-analog (D/A) conversions.

Product Parameters

The technical parameters of Yokogawa Analog Modules are engineered to provide maximum accuracy and reliability for process control:

• Signal Channels: Offered in varying densities, typically 4-channel, 8-channel, or high-density 16-channel configurations.

• Input and Output Ranges: Supports standard process signals including 4-20mA DC current loops, 1-5V DC, 0-10V DC voltage inputs, as well as direct connections for Thermocouples (Types K, J, T, E, R, S, B, N) and Resistance Temperature Detectors (RTDs like Pt100).

• Conversion Resolution: Employs high-resolution A/D converters, typically 16-bit, ensuring exceptionally fine granularity in data representation.

• Accuracy Rating: Delivers extreme precision, with standard modules offering an accuracy of plus or minus 0.05 percent to 0.1 percent of the full scale.

• Sampling and Update Rate: Fast response times with input sampling intervals typically ranging from 10 milliseconds to 100 milliseconds per channel.

• Isolation Voltage: Robust galvanic isolation between channels and the system logic circuitry, often rated up to 1500V AC or higher to withstand unexpected field surges.

Product Advantages

Yokogawa Analog Modules are highly regarded in the process automation sector due to several distinct operational benefits:

• Dual-Redundancy Capability: Many Yokogawa modules support a redundant configuration where two modules operate simultaneously. If the primary module experiences a fault, the backup seamlessly takes control without interrupting the process loop.

• Integrated HART Communication: Select modules feature built-in support for the HART protocol, allowing the DCS to pass digital asset management data, diagnostics, and calibration parameters directly through the standard 4-20mA analog wiring.

• Online Module Replacement: Supports true "hot-swapping" functionality, allowing maintenance technicians to replace a faulty module while the system is powered and running, reducing downtime in continuous-production plants.

• Exceptional Noise Rejection: Advanced hardware filtering techniques provide superior common-mode and normal-mode noise rejection, ensuring signal integrity even in environments with heavy electromagnetic interference.

• Long-Term Stability: Built with high-grade components that minimize thermal drift, ensuring that the module maintains its calibration accuracy over years of continuous operation.

Product Applications

These modules are widely deployed across industries where precise process regulation is mandatory:

• Petrochemical and Refining: Monitoring and controlling critical loops for temperature, pressure, and level in distillation columns and cracking units.

• Liquefied Natural Gas (LNG): Managing precise flow measurements and cryogenic temperature sensing throughout the liquefaction and transport process.

• Power Generation: Interfacing with boiler drum level transmitters, steam temperature sensors, and turbine pressure gauges in thermal and nuclear power plants.

• Pharmaceutical and Biotech: Regulating delicate environmental conditions and bioreactor inputs where even slight measurement deviations can ruin an entire production batch.

• Water and Wastewater Treatment: Monitoring chemical dosing, dissolved oxygen levels, and effluent flow rates across large-scale municipal infrastructure.

Important Precautions

To preserve the accuracy and safety of Yokogawa Analog Modules, operators must adhere to these strict installation and handling guidelines:

• Shield Grounding Rules: Always utilize shielded twisted-pair cables for all analog signals. The cable shield must be grounded at a single point (typically at the DCS cabinet side) to prevent ground loops from distorting the analog readings.

• Separation of Field Wiring: Never route low-voltage analog signal cables in the same conduit or cable tray as high-voltage power lines or motor control wiring to avoid inductive noise coupling.

• Unused Channel Configuration: To prevent open-circuit alarms and erratic readings caused by floating inputs, ensure that all unused channels are either short-circuited with a jumper wire or disabled within the system configuration software.

• Proper Terminal Tightening: Ensure that all terminal block screws are tightened to the manufacturer's exact torque specification. Loose terminal connections introduces variable resistance, which directly degrades the accuracy of current and voltage signals.

• Ambient Temperature Monitoring: Install the modules within an enclosure that maintains the specified operating temperature range. Avoid placing high-heat generating components directly beneath the analog input rack to prevent accelerated component aging and thermal drift errors.

The structure and details of the product：

Our services：

Shipping Port:  China

Payment: Bank of Chicago, Bank of Singapore

Express cooperation: fedex, DHL, UPS and your express account

Service: Professional Sales provides 24 hours /7 days online service

Warranty: one year

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