YOKOGAWA DYA Vortex Flow Converter

YOKOGAWA DYA Vortex Flow Converter

Introduction

The YOKOGAWA DYA Vortex Flow Converter is the remote type converter component of the digitalYEWFLO series, designed to work seamlessly with DY-series vortex flowmeter detectors (DY-N models) in applications where the converter must be mounted separately from the measurement point-. With over 450,000 vortex flow units installed worldwide-, the DYA converter inherits the field-proven reliability of the digitalYEWFLO platform while offering installation flexibility for high-temperature, space-constrained, or hazardous-area applications-.

Core Technology: SSP (Spectral Signal Processing)

At the heart of every YOKOGAWA DYA Vortex Flow Converter lies SSP (Spectral Signal Processing)—Yokogawa’s proprietary digital signal processing technology-. SSP intelligently analyzes the detected frequency spectrum and applies a segmented band-pass filter that allows only genuine vortex frequencies to pass through while effectively eliminating noise. This ensures stable and accurate measurements even under harsh process conditions with significant pipeline vibration or flow disturbances-.

Key Technical Specifications

Power Supply

The DYA converter supports flexible power supply configurations depending on the installation environment:

General-purpose and flameproof types: 9 to 32 V DC-

Intrinsically safe type (Entity model): 9 to 24 V DC

Intrinsically safe type (FISCO model): 9 to 17.5 V DC

Output Signals

The DYA converter provides multiple output options including 4–20 mA DC analog output, pulse output, and BRAIN or HART communication protocols-. For Fieldbus communication type models (output code F), the converter conforms to FOUNDATION Fieldbus specifications.

Ambient Temperature Range

Remote type converter without indicator: –40 to +60°C
Remote type converter with indicator: –30 to +60°C

Enclosure Protection

IP67 degree of protection ensures reliable operation in demanding industrial environments.

Electrical Connections

ANSI 1/2 NPT female or ISO M20 × 1.5 female

Remote Cable Specifications

Maximum cable capacitance: 160 nF-

Model Code Explanation: DYA-D2D/KF1

To understand the configuration flexibility of the YOKOGAWA DYA series, let us examine the complete model code DYA-D2D/KF1.

This designation breaks down as follows:

The DYA-D2D/KF1 configuration represents a remote type vortex flow converter with 4–20 mA DC + BRAIN communication, ANSI 1/2 NPT female electrical connection, an integral indicator, and ATEX flameproof certification for hazardous area deployment. The /KF1 option complies with EN50014 and EN50018 standards with type of protection EExd IIC T6 for the converter.

Common DYA Model Configurations

The DYA series offers multiple suffix-code combinations to suit diverse application requirements. Common configurations include:

DYA-D0D – 4–20 mA DC + BRAIN communication, no electrical connection option specified, with indicator-

DYA-D0N – 4–20 mA DC + BRAIN communication, no electrical connection option specified, without indicator-

DYA-D2N – 4–20 mA DC + BRAIN communication, ANSI 1/2 NPT female connection, without indicator-

DYA-D4D – 4–20 mA DC + BRAIN communication, ISO M20 × 1.5 female connection, with indicator-

DYA-D2D/SY – 4–20 mA DC + BRAIN communication, ANSI 1/2 NPT female, with indicator, with standard factory settings-

For Fieldbus applications, configurations such as DYA-E2D (HART communication) are also available-. Complete systems often combine a DY detector with a DYA converter, for example: DY200-NBLBA2-2N+DYA-D2D+DYC-1-30.

ATEX Flameproof Approval (/KF1)

The /KF1 option provides ATEX flameproof certification for the DYA converter:

Applicable Standards: EN50014, EN50018

Type of Protection: EExd IIC T6

Group/Category: II 2G

Ambient Temperature: –40 to +60°C (without indicator)

Enclosure: IP67