Basler Electric IFM-105 – Firing Circuit Chassis Assembly

The Basler Electric IFM-105 (part number 9324100105) is a firing circuit chassis assembly engineered to provide precise, isolated gate drive pulses to SCR and thyristor stacks. Powered from a standard 120 V AC supply, this unit ensures accurate phase‑angle firing with high noise immunity, making it a critical component in static excitation systems and power converters.

Design and Operation

The IFM-105 integrates pulse generation, isolation, and amplification stages within a rugged chassis. It accepts synchronising signals from the AC line and a control voltage from the regulator, producing complementary firing pulses for dual‑SCR configurations. The chassis is compatible with both single‑phase and three‑phase bridge arrangements.

• Supply voltage: 120 V AC ±10%, 50/60 Hz

• Control input: 0–10 V DC or 4–20 mA

• Output pulse width: adjustable 20–150 μs

• Galvanic isolation: 2500 V RMS between input and output

• LED indicators: power, pulse‑enable, and fault

• Mounting: panel or chassis mount

• Operating temperature: 0 °C to +60 °C

Applications

Commonly used in brushless exciter systems, battery chargers, and DC motor controls.

Installation

Wiring via screw terminals. Onboard adjustments for pulse width and phase shift.

Reliability

Built with high‑grade components and conformal‑coated circuit boards.

In summary, the Basler Electric IFM‑105 firing circuit chassis delivers reliable SCR triggering for demanding power conversion applications.