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QD-6041/6043/6044 4-20mA Intrinsically Safe Isolator Barrier

Intrinsically safe 4–20mA isolator barriers with HART compatibility, ±0.1% accuracy, and flexible 1-in/1-out to 2-in/2-out configurations for reliable hazardous-area signal acquisition.
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QD-6041/6043/6044 4-20mA Intrinsically Safe Isolator Barrier

4-20mA current input safety barrier for hazardous area pressure and level transmitters

Reliable Current Input Measurement & Conversion

QD-6041 / QD-6043 / QD-6044 is a current input safety barrier designed around “Reliable Current Input Measurement & Conversion.” Supports 20mA, 4–20mA for stable current input measurement and system integration. The sensing structure converts the physical process variable into a clear signal for industrial monitoring and automation. The confirmed values highlighted here are 20mA, 4–20mA. The feature is directly relevant to control cabinet, hazardous-area instrument loop and industrial process projects. Improve measurement clarity and maintenance efficiency in control cabinet applications, helping engineers keep the installation, inspection and signal path easier to manage during long-term operation.

QD-6041 QD-6043 QD-6044 isolator barriers with flexible current signal channel configurations

Flexible Multi-channel Current Input Integration

QD-6041 / QD-6043 / QD-6044 is a current input safety barrier designed around “Flexible Multi-channel Current Input Integration.” Model options QD-6041, QD-6043, QD-6044 match different channel and point-count requirements. The channel and model arrangement makes it easier to match the number of field points without changing the overall cabinet architecture. The feature is directly relevant to control cabinet, hazardous-area instrument loop and industrial process projects. Handle more monitoring points with fewer separate cabinet modules, helping engineers keep the installation, inspection and signal path easier to manage during long-term operation.

intrinsic safety isolation between hazardous area 4-20mA transmitters and PLC DCS systems

Intrinsically Safe Current Input Isolation

QD-6041 / QD-6043 / QD-6044 is a current input safety barrier designed around “Intrinsically Safe Current Input Isolation.” Separates the hazardous-area current input loop from the safe-side control system. The isolated signal path separates the hazardous-area device from the safe-side control system and helps limit unwanted electrical interaction across the barrier. The feature is directly relevant to control cabinet, hazardous-area instrument loop and industrial process projects. Protect hazardous-area loops while keeping safe-side data stable, helping engineers keep the installation, inspection and signal path easier to manage during long-term operation.

Working Principle Diagram

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Technical Specifications

Signal Type:4-20mA analog; fully compatible with 2-wire loop-powered field transmitters


System Transmission Accuracy:±0.1% F.S., full-range temperature compensated


Temperature Drift Coefficient:≤30ppm/℃; minimal reading fluctuation from seasonal ambient temperature changes


Non-linearity Error:≤0.05% F.S.


Step Response Time:≤100ms; follows rapid process changes without lag


Adjustable Damping:0.1 ~ 10s selectable digital filtering


Load Regulation:≤0.05% F.S. per 100Ω load change


Power Supply Regulation:≤0.05% F.S. over full supply voltage range

Dimension Chart

Width x Height x Length: 17.7 mm x 110 mm x 118.9 mm

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Wiring Diagram

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