Description

FC36M 110V Three-Phase Dual Mode Thyristor Firing Board

The FC36M 110V Dual Mode Firing Board is a microprocessor-based three-phase thyristor driver designed to provide accurate and reliable control of SCRs (thyristors) in industrial power control applications. Supporting both phase-angle and burst-fire firing modes, the FC36M offers flexible control for resistive and inductive loads, making it suitable for a wide range of industrial processes.

Designed for seamless integration into power control assemblies, the FC36M simplifies installation by eliminating the need for external phasing supply transformers. Available in 110V, 230V, 415V, and 480V supply versions, this model is configured for 110V AC operation and features opto-isolated control inputs, adjustable ramp control, over-current protection, and an RJ45 communications port for enhanced system integration.

This version operates on 110V AC supply.

Key Features

The FC36M 110V Dual Mode Firing Board delivers advanced SCR firing control for industrial power systems, combining flexible operating modes with comprehensive protection and easy integration.

• 110V AC supply version
• Microprocessor-based three-phase thyristor driver
• Dual operating modes: Phase Angle and Burst Fire
• Switch-selectable phase reversal
• Suitable for resistive and inductive loads
• Analogue and digital opto-isolated control inputs
• Adjustable soft-start ramp (0–30 seconds)
• Current limit and over-current latching protection
• LED status indicators for system monitoring
• RJ45 communications port for integration
• Simplified wiring with no external phasing transformer required

Technical Specifications

• Supply Voltage: 110V AC ±10%
• Frequency: 50/60Hz
• Controller Type: Microprocessor-based three-phase thyristor driver
• Operating Modes: Phase Angle or Burst Fire (switch selectable)
• Primary Fusing: Two HRC F1A ceramic fuses (20 × 5mm)
• Current Consumption: 350mA (full conduction)
• Initial Short-Circuit Gate Current: 500mA
• Sustaining Short-Circuit Gate Current: 250mA
• Initial Pulse Voltage: 9V
• Sustaining Pulse Voltage: 5V
• Pulse Train Frequency: 25kHz
• Voltage Control Inputs: 0–5V DC or 0–10V DC
• Input Resistance: 10kΩ / 20kΩ
• Current Control Input: 4–20mA
• Current Input Resistance: 240Ω
• Opto-Isolated Digital Inputs: 5–24V DC
• Ramp Adjustment: 0–30 seconds
• Current Limit / Over-Current Trip: 0–100mV DC or 0–25V DC
• Load Selection: Resistive or Inductive (SW4 selectable)
• Operating Temperature: 0°C to +65°C
• Storage Temperature: 0°C to +65°C

PCB Dimensions

• PCB Size: 162mm (L) × 108mm (W) × 40mm (H)
• Fixing Holes: 4 × M3.5 clearance holes
• Fixing Centres: 150mm × 62mm

DIN Rail Enclosure

• Dimensions: 166mm (L) × 128mm (W) × 70mm (H)

Operation

The FC36M firing board generates precise gate firing pulses for three-phase SCR power controllers. Users can select between phase-angle firing for proportional power regulation or burst-fire control for efficient switching of resistive heating loads.

Control signals may be provided using analogue voltage, current, or digital opto-isolated inputs. Adjustable ramp control allows gradual power increase during start-up, while built-in over-current protection helps safeguard connected equipment.

The board supports both resistive and inductive load configurations, making it suitable for a broad range of industrial power control applications.

Applications

The FC36M 110V Thyristor Driver is ideal for:

• Three-phase SCR power controllers
• Industrial power supplies
• Half-controlled rectifiers
• Fully controlled rectifiers
• AC motor control
• DC motor control
• Soft starter systems
• Electric heater controllers
• Induction generators
• AC voltage regulators
• Industrial process control
• Manufacturing equipment
• Power conversion systems

Benefits

• Precise three-phase SCR firing control
• Supports both phase-angle and burst-fire operation
• Simplifies system wiring and installation
• Compatible with analogue and digital control signals
• Adjustable soft-start reduces electrical stress
• Built-in over-current protection improves system safety
• Suitable for both resistive and inductive loads
• Reliable microprocessor-based operation
• Easy integration into industrial control systems
• Multiple supply voltage options available across the FC36M range

Safety & Installation

• Installation should only be carried out by suitably qualified personnel.
• Isolate all power supplies before installation or maintenance.
• Ensure the correct 110V supply version is used.
• Fit appropriate external circuit protection in accordance with local electrical regulations.
• Configure load type and operating mode correctly before commissioning.
• Install within the specified operating temperature range and provide adequate enclosure ventilation.

X20004 – FC36M User Manual(7)