Description

DMFC12 415VAC Dual Mode Phase Angle & Burst Fire Controller

The DMFC12 Dual Mode Firing Circuit is a versatile and reliable power control solution designed for industrial applications. The DMFC12 Dual Mode Firing Circuit is a compact, high-performance thyristor (SCR) driver designed for precise industrial power control. Supporting both phase-angle and burst-fire modes, it provides flexible regulation for resistive and inductive loads across a wide range of applications.

Housed in a DIN-rail enclosure, the DMFC12 integrates easily into control panels and offers extensive signal compatibility, soft-start functionality, current limit capability, and phase-loss detection. With frequency tracking from 4Hz to 400Hz and a flexible auxiliary supply, this module is ideal for demanding installations where stability, accuracy, and reliability are essential.

Key Features

• Dual mode control: Phase-angle and burst-fire
• Adjustable soft-start: 0–30 seconds
• Current limit input via CT, Hall-effect device, or amplified shunt
• Wide signal compatibility:
  • 0–5V / 0–10V
  • 0–20mA / 4–20mA
  • Potentiometer control
• DIN rail mounting for simple integration
• Frequency tracking: 4Hz – 400Hz
• Operates from 18–24VAC or 24VDC supply
• Phase-loss detection
• High-resolution version available
• Compact, durable DIN enclosure

Benefits

• Precise and stable SCR firing control
• Suitable for unstable or variable frequency supplies
• Fast installation into existing panels
• Flexible control input options for easy system integration
• Improved protection and smoother load start-up

Technical Specifications

Phase Reference Voltage (PH1 & PH2) [10 & 11]

• 415VAC RMS ±10%
• Variable or fixed frequency: 4–400Hz

Auxiliary Power Supply [1 & 2]

• 18–24VAC or 24VDC @ 200mA nominal

Signal Input

• Signal span minimum: 0–4VDC
• Signal span maximum: 0–25VDC
• Signal zero offset: +60% / −40% of span
• Potentiometer: 1kΩ, 5kΩ, or 10kΩ
• Input resistance:
  • 5kΩ (Voltage signal)
  • 250Ω (mA signal) ±10%

Control & Protection

• Limit feedback input: 3–25VDC
• Soft start: 0–30 seconds adjustable
• Phase loss detection
• Trigger pulse height: 8VDC (open circuit)
• Trigger isolation: 2500VAC RMS
• Trigger pulse rating: 250mA into 10Ω

Environmental

• Storage temperature: 0°C to +65°C
• Maximum operating temperature: 70°C

Mechanical

• DIN enclosure dimensions (D × H × W): 122 × 70 × 56 mm

Applications

• Heater and furnace control
• Motor speed regulation (via SCR assemblies)
• Lighting control
• General industrial power regulation
• Systems requiring stable control across varying frequencies