August 5, 2026 – AutomationDirect has added Gefran GRM-H series SCR power controllers that convert analog signals (0–10 V, 4–20 mA), PWM duty-cycle outputs, potentiometer, and discrete ON/OFF commands from PLCs and PID controllers into precise SCR-based control of AC power for industrial heating applications.
These ultra-compact controllers are available in 10 A, 25 A, 50 A, and 75 A models rated for 480 VAC (60-530 VAC working range). They provide advanced current limiting and continuous load monitoring to improve heater protection and process stability. Specialized control functions, including soft-start ramping and closed-loop power regulation, reduce startup inrush currents and maintain consistent energy delivery despite line voltage fluctuations and load resistance changes caused by temperature or aging. Select models offer Modbus RTU (RS-485) communication for networked system integration and centralized control. All models include an integrated, correctly-sized heatsink, eliminating the need for separate heatsink selection or sourcing.
Control modes include burst firing with optimized cycle time, fixed cycle time, half-single-cycle, and phase angle firing, providing flexible performance across a wide range of heating applications.
Configuration is supported via the free NFC (Near Field Communication) smartphone app for no-power, no-PC programming directly on the factory floor. The free GF_eXpress PC software connects via USB-TTL cable (GRM-H-USB-CBL accessory) or RS-485 and supports parameter duplication and sharing.
About AutomationDirect:
In business since 1994, AutomationDirect is a distributor offering thousands of industrial automation products for electrical control systems, including PLCs, operator interfaces, AC drives, motors, stepper systems, sensors, motor controls, enclosures and more. Their prices are typically well below the list price of more traditional automation companies because of their business model and focus on efficiency, and the majority of their products are stocked for fast shipping. Plus, get free two-day delivery on orders over $49; some limitations apply. For more information and the most current pricing on products contact them at 800-633-0405 or visit https://www.automationdirect.com/
Editorial Contact: Tina Gable
Phone: 678-455-1845
Email: tgable@automationdirect.com
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