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GLC Plug-in Signal Isolator for Control Cabinets

A plug-in modular isolator that enables fast, wiring-free module replacement to minimize downtime and simplify control cabinet maintenance.
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GLC Plug-in Signal Isolator

GLC signal isolator featuring a plug-in module design for easier cabinet maintenance. Designed for PLC, DCS, and automation control cabinets with quick replacement and easy inspection.

Plug-in Design for Easier Cabinet Maintenance

The GLC series features an innovative two-part design: a fixed wiring base and a removable functional module. This allows technicians to extract the active isolator unit directly from its base without disconnecting any field wiring or disturbing the surrounding cabinet layout. By eliminating the need to unscrew terminals, this design significantly accelerates replacement work and minimizes the risk of accidentally loosening adjacent wire connections. A clearer, tool-free plug-in maintenance path shortens system downtime during service intervals, keeps cabinet wiring strictly organized, and allows engineers to restore the analog signal loop with minimal disruption to the overall industrial control process.

GLC active signal isolator and converter. Compatible with 4-20mA, 0-20mA, 0-5V, and 0-10V current and voltage signals for flexible matching in common analog signal loops.

Active Signal Isolation & Conversion

Beyond basic transmission, it acts as a reliable barrier against electrical noise, ground loops, and interference, delivering clean, isolated signals to downstream equipment. This comprehensive compatibility enables engineers to connect varied field instruments to standard PLC analog input modules or indicators using a single product family. Instead of redesigning the signal chain or procuring distinct isolator models for every unique instrument, procurement teams can standardize on the GLC series. Selecting the appropriate input and output combination within the same uniform module structure ensures easier system matching, cleaner cabinet integration, and significantly fewer compatibility hurdles during site commissioning or equipment upgrades.

GLC signal isolator with stronger overload protection. Supports 2x rated continuous overload and 5x rated overload for 10 seconds, ensuring reliability under unstable field signal fluctuations.

Stronger Overload Protection

More reliable under unstable field signal fluctuations

Field signal fluctuations, temporary voltage surges, and abnormal process conditions are common challenges in heavy industrial environments. The GLC signal isolator is built with robust internal circuitry designed to tolerate severe electrical stress, offering 2× continuous overload protection and the ability to withstand a 5× overload for up to 10 seconds.

Working Principle Diagram

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Technical Specifications

Input Load / Input Impedance:Current ≤ 50 Ω; Voltage ≥ 300 kΩ


Maximum Output Load Resistance:Current ≤ 500 Ω; Voltage ≥ 10 kΩ


Response Time:≤ 10 ms


Temperature Drift (ppm/℃):5 ppm/°C


Linearity Error:≤±0.1% FS


Zero & Span Adjustment:Side-mounted adjustable potentiometer


Support Reverse Signal:Supports 20–4 mA, 0–10 V


Transmitter Power Supply:DC 24 V power supply standard across the entire series


Isolation Mode(Input / Output / Power):Three-terminal electromagnetic isolation


Dielectric Withstand Voltage:2500 V AC


Insulation Resistance:≥100 MΩ

Dimension Chart

L*W*H : 122mm x 18mm x 96mm

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Wiring Diagram

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Phone: +86-19715617532
Add: Building 14, University Science and Technology Park, Fenghuangshan Economic Development Zone, Xiangshan District, Huaibei City, Anhui Province

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