Technical Specifications​

Input voltage: 120 VAC, single phase, 50/60 Hz.

Output current class: 15 A DC.

Output DC voltage: approximately 90% of applied AC input voltage.

Command signals: 4-20 mA optically isolated, 0-10 V, 0-±10 V or remote potentiometer according to ordered configuration.

Adjustments: multi-turn zero and span controls for command matching.

Indicators: control power indicator and command signal indicator.

Functional Features​

Accepts standard analog command signals for automatic process control.

Provides isolated 4-20 mA command input to reduce ground-loop interference.

Uses phase-fired SCR control for smooth DC output regulation.

Includes zero and span calibration for matching different control systems.

Offers front status indicators for power and command level troubleshooting.

Performance Parameters​

Output regulation follows command input after zero and span setup.

Green command indicator brightness is proportional to output voltage level.

Red power indicator confirms control power application.

Material Composition​

Enclosure and heat dissipating structure suitable for panel mounting.

SCR power semiconductors with heatsink assembly.

Control PCB with command isolation, calibration and firing circuits.

Terminal hardware for AC input, DC output and analog command wiring.

Structural Features​

Compact power control housing with separated power and control sections.

Accessible zero, span and calibration adjustments.

Dedicated AC input terminals, DC output terminals and command input terminals.

Status indicators on front section for commissioning and maintenance.

Working Principle​

The controller receives an analog command signal and compares it with output feedback. The firing circuit controls SCR conduction angle on each AC half-cycle. Increased command produces longer SCR conduction and higher average DC output; decreased command reduces conduction angle and lowers DC output. Output DC level remains approximately 90% of input AC peak rectified value according to load and firing conditions.

Installation Requirements​

Mount in a ventilated enclosure with adequate clearance for heat dissipation.

Verify AC supply voltage, frequency and current rating before connection.

Use properly sized conductors for 15 A DC output and SCR input current.

Separate command wiring from power wiring to avoid electrical noise.

Ground the enclosure and shielding according to local electrical codes.

Usage Precautions​

Do not exceed 120 VAC input rating and 15 A output current rating.

Confirm 4-20 mA input is optically isolated configuration before wiring.

Check zero and span settings before energizing the load.

Disconnect AC supply before servicing terminals or replacing fuses.

Avoid moisture, dust accumulation and insufficient ventilation during operation.