PLCs, Power Supplies & Others

Precision Pulse Amplification for Drive Systems

This amplifier pulse board generates and conditions firing pulses for thyristor power converters. The SAFT 123 PAC SAFT123PAC provides isolated gate drive signals for high-power SCR and IGCT modules. It receives control commands from the main processor and translates them into precise timing pulses. Moreover, the board includes built-in protection against short circuits and pulse transformer faults. Its robust design ensures reliable firing even under demanding electrical noise conditions.

Technical Specifications and Physical Attributes

The SAFT123PAC operates on a 24 V DC control supply for its internal logic. It delivers pulse outputs with an amplitude of approximately 5 V at 300 mA. The board features optical isolation between the control section and power stage. It measures 180 mm in width and 110 mm in depth for standard subrack mounting. The unit weighs approximately 0.6 kg. Furthermore, the SAFT123PAC supports a maximum switching frequency of 1 kHz. Its operating temperature ranges from -20 °C to +55 °C for various industrial environments.

Installation and Application Guidance

This board interfaces between the control system and high-power semiconductor devices. First, insert the SAFT123PAC firmly into the designated subrack slot. Then, connect the control signals from the main processor board via the ribbon cable. For the output, wire the pulse transformer leads to the corresponding terminals. Always verify the wiring polarity to avoid damage to the power semiconductors. The SAFT123PAC finds common use in DC drives, AC variable speed drives, and excitation systems.

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