RONGDE RDAQ-1 Product Description

Overview

RONGDE RDAQ-1 is an intrinsically safe zener barrier for 4-20mA signal circuits, designed for use with RDLY series pressure transmitters in hazardous area installations. It limits the energy transferred into the explosive zone to maintain intrinsic safety, and serves as the isolation protection component between safe-side control equipment and field instruments. It is widely stocked as an OEM spare part for process automation and explosion-proof system maintenance.

Features

RONGDE RDAQ-1 adopts a dedicated zener protection circuit with low leakage current and stable performance without signal drift. It provides reliable energy limiting to meet Ex ia IIC explosion-proof requirements. The unit supports maximum 250 V AC/DC allowable voltage and delivers strong anti-interference performance for industrial field environments. It is built in a compact DIN-rail metal housing and uses screw terminals for convenient wiring. The barrier is designed for loop-powered 4-20mA transmitters and does not require extra power supply. It can be matched with certified intrinsically safe sensors for chemical, petrochemical and gas detection applications.

Specs

Brand: RONGDE Model: RDAQ-1 Product series: RDAQ Product category: Zener barrier, intrinsically safe safety barrier Explosion-proof marking: Ex ia IIC Max allowable voltage: 250 V AC/DC Signal type: 4-20 mA analog loop for RDLY pressure transmitter Mounting: 35 mm DIN rail Housing: Metal enclosure Protection class: IP30

Principle

RONGDE RDAQ-1 uses zener diodes and current-limiting resistors to restrict voltage and current entering the hazardous zone. When abnormal overvoltage or surge occurs on the safe side, the zener circuit clamps the voltage and limits the loop current below the ignition threshold of explosive gas mixtures. It passes the normal 4-20mA measurement signal while preventing dangerous energy from triggering explosion.

Applications

RONGDE RDAQ-1 is applied for intrinsic safety protection of pressure transmitters in hazardous locations. Typical applications include chemical dosing systems, petrochemical plants, gas monitoring stations, oil & gas field control panels, and spare replacement for existing RONGDE intrinsically safe instrument loops.