The HDH-21 is a universal, high-performance signal conditioner and isolator engineered for precision industrial automation. This versatile module expertly isolates and converts a wide range of DC voltage and current signals—including 0-5V, 0-10V, -10~+10V, and 4-20mA—into standard outputs like 4-20mA, 0-5V, or 0-10V. Consequently, it provides the critical interface to transmit clean, reliable signals from sensors and transmitters to PLCs, DCS systems, and display instruments.
Featuring a compact DIN rail design, it enables independent and space-saving installation in any control cabinet. Key technical advantages include high efficiency, excellent linearity, and low temperature drift for stable, accurate performance in demanding environments. For maximum flexibility, customers specify their exact input and output signal ranges (e.g., 0-5V in / 4-20mA out) when ordering. Ultimately, the HDH-21 protects your control systems from noise, ground loops, and signal distortion, ensuring integrity across your process loops in the GCC.
