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QD-6024/6930 Intrinsically Safe Switching Output Isolator Barrier

Intrinsically safe switching output isolator barriers with fast response, low leakage, short-circuit protection, and flexible channel configurations for reliable hazardous-area control.
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QD-6024/6930 Intrinsically Safe Switching Output Isolator Barrier

switching output safety barrier for isolated control signals from safe area to hazardous equipment

Integrated Control Function for Faster System Response

QD-6024 / QD-6930 is a switching output safety barrier designed around “Integrated Control Function for Faster System Response.” Provides clear switching, alarm or relay functions for equipment control and interlocking. The alarm, relay, switching or control function turns the measured condition into a clear action for pumps, valves, warning devices or equipment interlocks. The feature is directly relevant to control cabinet, hazardous-area instrument loop and industrial process projects. Respond faster to abnormal conditions and equipment control demands, helping engineers keep the installation, inspection and signal path easier to manage during long-term operation.

QD-6024 and QD-6930 switching output barriers with single and dual channel options

Direct Single-channel Switching Output Conversion

QD-6024 / QD-6930 is a switching output safety barrier designed around “Direct Single-channel Switching Output Conversion.” Model options QD-6024, QD-6930 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 isolator separating safe area controls from hazardous area output circuits

Intrinsically Safe Switching Output Isolation

QD-6024 / QD-6930 is a switching output safety barrier designed around “Intrinsically Safe Switching Output Isolation.” Separates the hazardous-area switching output 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

On-State Output Accuracy:±0.5% FS @ 25℃ reference ambient


Load Regulation:< 0.1% FS across full allowable load range


Line Regulation:< 0.05% FS within 18~36 V DC supply range


Output Ripple & Noise:< 20 mVpp (on-state, full load condition)


Maximum Allowable Load Resistance:0 ~ 400 Ω (stable rated output maintained)


Off-State Leakage Current:< 0.1 mA, eliminates false triggering of downstream devices


Turn-on / Turn-off Response Time:< 2 ms (10% to 90% step change)


Input Switching Hysteresis:~10% of threshold, suppresses contact bounce & field noise interference


Output Short-Circuit Protection:Built-in self-recovering protection, automatic recovery after fault clearance


Common Mode Rejection Ratio (CMRR):≥ 120 dB @ 50/60 Hz


Normal Mode Rejection Ratio (NMRR):≥ 60 dB @ 50/60 Hz

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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