Description

BM3 3-Phase Burst Fire Trigger Module (MONO-LINK™)

The BM3 3-Phase Burst Fire Trigger Module is designed for precise and reliable control of resistive heating loads in industrial and commercial environments. Using advanced MONO-LINK™ gate-to-gate firing technology, the module eliminates phase timing issues commonly associated with multi-phase power control, ensuring stable and consistent operation.

With zero-voltage switching, the BM3 minimises electrical noise and eliminates radio frequency interference (RFI), making it ideal for sensitive environments. Its proportional burst-fire operation delivers accurate power regulation based on manual or DC input signals, providing smooth and efficient heater control across a wide range of applications.

Key Features

• Fires triacs or thyristors up to 440VAC

• MONO-LINK™ gate-to-gate firing for synchronised operation

• Zero-voltage switching for RFI-free performance

• Opto-isolated output for safe and reliable triggering

• Status LED for quick visual diagnostics

• Proportional burst-fire control via manual or DC signal

Benefits

• Stable three-phase heater control without phase timing issues

• Reduced electrical interference and improved system reliability

• Precise proportional power control

• Simple integration into heating and ventilation systems

• Safe operation with isolated trigger outputs

Typical Applications

• Air curtains

• Space heaters

• Industrial furnaces

• Ovens and drying equipment

• General resistive heating systems

Technical Specifications

Control & Signal

• Signal span minimum: 0–2V DC

• Signal span maximum: 0–25V DC

• Signal zero offset: 0–30% of span

• Cycle time base: nominal 1 second

• Manual potentiometer: 2kΩ, 5kΩ or 10kΩ

Electrical Ratings

• Maximum gate/line voltage: 440V AC

• dv/dt rating: 100V/µs

• Trigger output rating: 0.8A

• Trigger isolation voltage: 2500V RMS

• AC input supply: 18–24V AC/DC @ 65mA

• Auxiliary output: 5V DC @ 5mA (protected)

• Line frequency: 50/60Hz

Protection & Indicators

• Opto-isolated trigger output

• Status LED indicator

• MONO-LINK fuse: F100mA (HRC)

Environmental

• Storage temperature: −20°C to +85°C

• Maximum ambient operating temperature: 65°C

Connections

• Power connections: 6.3mm AMP tags